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Siemens RMH760 Manual

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Type: Manual
Category: Controller
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CE1N3131en 
03.07.2003 

Siemens Building Technologies

HVAC Products

 

 

3

131

 

 

 

 

 

 Synco™700 

 

Heating Controllers 

RMH760

 

 

• 

Heating controller for medium-size and large buildings. The RMH760 is used 
as a heating circuit or primary controller. The controller is supplied with 105 
preprogrammed heating plants  

• 

Boiler temperature control, control of a second heating circuit and DHW heat-
ing with extension modules  

• 

Menu-driven operation with separate operator unit (plug-in type or detached) 

Use 

• 

Office and administrative buildings 

• 

Commercial buildings and shops 

• 

Schools 

• 

Hospitals 

• 

Industrial buildings and workshops 

• 

Apartment blocks and terraced houses  

 

• 

Heating sections of ventilation and air conditioning plants 

• 

Distribution zones of ventilation and air conditioning plants 

• 

Heating systems with own heat source  

• 

Heating zones of a larger plant  

• 

Basic load heating systems  

 
 

Buildings  

Plants  

 


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Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

03.07.2003 

Functions 

Several of the functions listed require extension modules.  

 

Room operating modes are:  

• 

AUTO: Automatic changeover between 3 setpoints according to the time program 

• 

Comfort: Continuously heating to the Comfort setpoint 

• 

Precomfort: Continuously heating to the Precomfort setpoint 

• 

Economy: Continuously heating to the Economy setpoint 

• 

Protective mode: Heating to the setpoint of Protective mode, if necessary  

 

• 

Year clock with automatic summer-/wintertime changeover 

• 

7-day clocks for time program with a maximum of 6 switching points per day  

 

• 

Holiday and special day program with 16 periods per year  

• 

Selectable room operating mode for the holiday periods  

• 

Selectable DHW operating mode for the holiday periods 

• 

Time program for special days  

 

2 ready configured inputs for:  

• 

Flow temperature (averaging possible)  

• 

Outside temperature 

 

3 freely configurable inputs, optionally for:  

• 

Reception of the following measuring signals:  

− 

Room temperature (averaging possible)  

− 

Return temperature  

− 

Wind speed  

− 

Intensity of solar radiation  

• 

Connection of a remote setpoint adjuster with relative or absolute room setpoint 
adjustment  

• 

Connection of an external switch for:  

− 

Operating mode changeover  

− 

Timer function  

− 

Changeover to holiday mode 

− 

Changeover to special day  

− 

Indication of faults  

 

If more than 3 configurable inputs are required, extension modules must be used.  

 

Remote operation with multifunctional room unit via Konnex bus 

 

• 

Heating circuit controller  

− 

Weather-compensated flow temperature control via the heating circuit mixing 
valve, with adjustable setpoints of Comfort, Precomfort, Economy and Protective 
mode  

− 

Adjustable influence of room temperature, solar radiation and wind  

− 

Optimized setback and heating up  

− 

Boost heating and quick setback 

− 

Automatic heating limit for demand-dependent control of the heating with adjust-
able heating limits for the Comfort and Economy modes  

− 

Automatic changeover to summer operation (heating off)  

− 

Room model for room functions without room sensor  

• 

Primary controller

 

 

Demand-dependent precontrol via the mixing valve in the common flow, based on 
the received heat demand signals  

 

• 

Maximum limitation of the room temperature 

• 

Minimum and maximum limitation of the flow temperature 

• 

Minimum or maximum limitation of the return temperature 

Note 

Room operating modes  

Clock functions  

Holiday functions 

Ready configured inputs 

Freely configurable in-
puts 

Note 

Remote operation 

Control functions 

Limitation functions  

 


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Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

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• 

Limitation of the rate of flow temperature increase  

 

• 

Control of an actuator with 3-position 

or

 DC 0…10 V control 

• 

Pump control (system or heating circuit pump) 

• 

Control of maximum 2 twin pumps  

• 

Indication of heat demand  

• 

Configurable relays  

 

• 

Mixing valve overrun, mixing valve kick  

• 

Pump overrun, pump kick  

• 

Outside temperature-dependent frost protection for the plant  

• 

Frost protection for the building 

• 

Overload supervision  

• 

Fault relay  

• 

Handling of status and error messages  

 

• 

Outside temperature simulation 

• 

Wiring test 

• 

Storage and reset of parameter sets 

 

• 

Demand-dependent boiler temperature control  

• 

Boiler pump control  

• 

Control of a 1- or 2-stage 

or

 modulating burner; modulating burner with 3-position 

or

 

DC 0…10 V control 

 

• 

Control of a second heating circuit  

• 

Maintained boiler return temperature with own mixing circuit  

• 

Control of an actuator with 3-position 

or

 DC 0…10 V control 

 

• 

Storage tank charging with charging pump, with or without mixing valve control 

• 

Storage tank charging via internal or external heat exchanger  

• 

Time programs for DHW heating and the circulating pump 

• 

Operating modes: AUTO, continuously Normal, continuously Reduced, Protective 
mode 

• 

Legionella function 

 

For a more detailed description of all controller functions, refer to Basic Documentation 
P3131.  

Type summary 

Type of unit 

Type reference 

Data Sheet 

Heating controller (default languages de, fr, it, es) 

RMH760-1 

N3131 

Heating controller (default languages de, en, fr, nl) 

RMH760-2 

N3131 

Heating controller (default languages sv, fi, no, da) 

RMH760-3 

N3131 

Heating controller (default languages pl, cs, sk, hu) 

RMH760-4 

N3131 

 

Operator unit, plug-in type 

RMZ790 

N3111 

Operator unit, detached 

RMZ791 

N3112 

Servicetool 

OCI700.1 

N5655 

 

Boiler module 

RMZ781 

N3135 

Heating circuit module 

RMZ782 

N3135 

DHW module  

RMZ783 

N3135 

Twin pump module 

RMZ786 

N3145 

 

Switching functions  

Supervisory and protec-
tive functions  

Service functions 

Boiler functions (requir-
ing boiler module 
RMZ781) 

Second heating circuit 
(requiring heating circuit 
module RMZ782) 

DHW functions  
(requiring DHW module 
RMZ783) 

Note 

Heating controller 

Operator and service 
units 

Extension modules 

 


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Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

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Universal module with 4 universal inputs and 
4 relay outputs 

RMZ787 

N3146 

Universal module with 4 universal inputs and 
2 analog and 2 relay outputs 

RMZ788 

N3146 

Module connector for detached extension modules 

RMZ780 

N3138 

Ordering 

When ordering, please give type reference according to the above table. 
The required operator unit and extension modules must be ordered as separate items.  
Room units, sensors, actuator and valve must also be ordered separately.  

Equipment combinations 

Type of sensor 

Type of sensing 
element, signal 

Type reference  Data Sheet 

Outside sensor 

LG-Ni 1000 

QAC22 

N1811 

Outside sensor 

NTC 575  

QAC32 

N1811 

Strap-on temperature sensor  

LG-Ni 1000 

QAD22  

N1801 

Immersion temperature sensor   LG-Ni 1000 

QAE2… 

N1791 

Cable temperature sensor  

LG-Ni 1000 

QAP21.3  

N1832 

Room temperature sensor 

LG-Ni 1000 

QAA24  

N1721 

Room temperature sensor 

LG-Ni 1000 

QAA64  

N1722 

Wind effect sensor  

DC 0…10 V 

QAV92 

N1946 

Solar impact sensor  

DC 0…10 V 

QLS60 

N1943 

 

Type of room unit 

Type reference  Data Sheet 

Room temperature sensor with setpoint adjuster  

QAA25 

N1721 

Room temperature sensor with setpoint readjuster 

QAA27 

N1721 

Room unit with Konnex interface 

QAW740 

N1633 

 
 

Type of remote setpoint adjuster 

Type reference  Data Sheet 

Remote setpoint adjuster, signal 0…1000 

 

BSG21.1 

N1991 

Remote setpoint readjuster, ±3 K 

BSG21.5 

N1991 

 
All types of electromotoric and electrohydraulic actuators from SBT HVAC Products can 
be used: 

• 

Operating on AC 24…230 V  

• 

3-position control 

• 

DC 0…10 V modulating control 

For detailed information about actuators and valves, refer to Data Sheets 
N4000…N4999. 

Product documentation 

Type of document  

Number 

Product Range Description  

S3110 

Basic Documentation 

P3130 

Installation instructions 

74 319 0344 0 

Operating Instructions (de, en, fr, nl) 

74 319 0346 0 

Declaration of Conformity (CE) 

T3110 

Environmental Declaration 

E3110…01 

Suitable sensors 

Suitable room units 

Suitable remote 
setpoint adjusters 

Suitable actuators 

 


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Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

03.07.2003 

Technical design 

The controller is supplied with 28 basic types of heating plant preprogrammed. They 
have been selected to cover the majority of standard applications. Some of them re-
quire extension modules.  
When commissioning a plant, the relevant basic plant type must be entered. All associ-
ated functions, terminal assignments, settings and displays will automatically be acti-
vated, and parameters not required will be deactivated.  
 
 
 

Precontrol can only be provided by the controller. There are 2 choices:  

With mixing valve:  

With system pump: 

 

P1 P2 

 

31

31

S

01

Y1

B1

M1

B7*

B7

 

31

31

S

02

B1*

M1

 

B1 Flow 

temperature 

sensor 

B1* Flow temperature sensor 

(optional, for display only) 

B7  Return temperature sensor (op-

tional, for minimum limitation) 

B7*  Return temperature sensor (op-

tional, for maximum limitation) 

M1  System pump (can be a twin 

pump) 

Y1 Mixing 

valve 

Measuring input B7 for the return temperature can be configured for either minimum or 
maximum limitation.  
 

The control of 1 or 2 heating circuits can be provided either by the controller or the 
RMZ782 heating circuit module. The available choices are the same with both types of 
unit, provided the required connection terminals for the desired auxiliary function are 
present.  
Please also note the following:  

• 

If the controller and heating circuit module do not have a sufficient number of config-
urable connection terminals, an additional extension module can be used  

• 

If the controller is used as a primary controller, the RMZ782 heating circuit module 
must be used for the control of the heating circuit  

• 

A second heating circuit must be controlled with the RMZ782 heating circuit module  

• 

Measuring input B7 for the return temperature can be configured for either minimum 
or maximum limitation  

Y1

M1

B1

B7

B7*

B9

A5

B5

B91
B92

31

31

S

39

R5

 

A5  Room unit (optional)  
B1 Flow 

temperature 

sensor 

B5  Room temperature sensor (optional) 
B7  Return temperature sensor (optional, for minimum limitation)  
B7*  Return temperature sensor (optional, for maximum limitation) 
B9 Outside 

sensor 

B91  Solar impact sensor (optional)  
B92  Wind effect sensor (optional)  
M1  Heating circuit pump (can be a twin pump)  
R5  Remote setpoint adjuster (optional)  
Y1 Mixing 

valve 

 

 

Mode of operation 

Use of individual de-
vices  

Precontrol 

Heating circuit control  

 


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Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

03.07.2003 

Boiler temperature control requires the RMZ781 boiler module. There are three 
choices: 

Pump in the flow: 

Boiler pump in the bypass:   

G1

 

G2

 

 

31

31

S

03

B2

M2

B7

 

31

31

S

04

B2

M2 B7

 

B2  Boiler temperature sensor  
B7  Return temperature sensor 

(optional, for minimum limitation)

 M1  Boiler pump or system pump 

(can be a twin pump)  

M2  Bypass pump (can be a twin 

pump) 

 
 
In plants with maintained boiler return temperature with own mixing valve, the following 
types of modules are required, in addition to the controller:  

• 

Heating circuit module RMZ782; it controls the boiler return temperature via a mixing 
valve, depending on the temperature acquired with B1. The module also controls 
boiler pump M1 

• 

Boiler module RMZ781; this module controls the boiler temperature depending on 
the temperature acquired with B2, and also controls system pump M2  

One of the basic types 4–… must be selected on the controller.  

G3 

31

31

S

41

M2

RMZ782

RMZ781

B2

B1

M1

Y1

Y2

 

B1  Boiler return temperature sensor (controlled variable) 
B2  Boiler temperature sensor  
M1  Boiler pump (can be a twin pump)  
M2  System pump (can be a twin pump)  
Y1 Mixing 

valve 

Y2  Balancing valve  

 
 
DHW heating requires the RMZ783 DHW module. There are 5 choices: 

DHW1

 

DHW2

 

31

31

S

34

M4

B41

B4

E7

M3

 

E7

31

31

S

35

M3

M4

B41

B4

Y5

B3

 

DHW3

 

DHW4

 

31

31

S

36

M3

M4

B3

Y5

E7

B41

B4

 

31

31

S

37

M3

M4

B3

Y4

B41

M5

B31

E7

B4

 

 

 

 

Boiler temperature control 

Maintained boiler return 
temperature 

DHW heating 

 


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Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

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DHW5

 

 

31

31

S

38

M3

M4

B3

B41

B4

M5

B31

E7

 

B3  Charging temperature sensor 
B31  Primary flow temperature sensor (optional) 
B4  Storage tank sensor at the top 
B41  Storage tank sensor at the bottom (optional)  
E7  Electrical immersion heater (optional)  
M3  Charging pump (can be a twin pump) 
M4  Circulating pump (optional)  
M5   Primary pump (can be a twin pump) 
Y5   Mixing valve or 2-port valve 

 

 

The illustrations contained in this section use the following symbols for precontrol, 
boiler temperature control and DHW heating:  

 

 

 

Precontrol 

Boiler temperature control 

DHW heating 

 

31

3

1S

07

RMH760

0-1

RMZ783

 

31

31

S

05

RMH760

0-2

 

31

31

S

08

0-3

RMH760

RMZ783

 

 

 

31

3

1S

06

RMH760

0-4

RMZ782

 

0-5

31

3

1S

09

RMZ783

RMH760

RMZ782

 

 

With all basic types 1–x, primary controller variants P1 and P2 can be selected.  

31

31

S

13

RMH760

1-1

RMZ783

 

RMH760

1-2

RMZ782

31

31

S

11

 

 

 

RMH760

1-3

RMZ782

31

3

1S

14

RMZ783

 

RMH760

1-4

RMZ782

31

3

1S

12

RMZ782

 

 

 

Basic types 

Note on illustrations  

Basic types 0–x 

Basic types 1–x 

 


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Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

03.07.2003 

RMH760

1-5

31

3

1S

15

RMZ782

RMZ783

RMZ782

 

 

 

 

With all basic types 2–x, primary controller variants P1 and P2 can be selected.  

RMH760

2-0

31

31

S

42

 

RMH760

2-1

RMZ783

31

3

1S

19

 

RMH760

2-2

RMZ782

31

31

S

17

 

 

 

31

3

1S

20

RMH760

2-3

RMZ782

RMZ783

 

RMH760

2-4

RMZ782

RMZ782

31

31

S

18

 

 

 

RMH760

2-5

RMZ782

RMZ782

31

31

S

21

RMZ783

 

 

 

With all basic types 3–x, boiler pump variants G1 and G2 can be selected.  

RMZ781

3-0

RMH760

31

31

S

22

 

RMZ783

RMZ781

3-1

RMH760

31

31

S

25

 

 

 

RMZ781

3-2

31

31

S

23

RMH760

 

RMZ781

3-3

RMH760

31

3

1S

26

RMZ783

 

 

 

Basic types 2–x  

Basic types 3–x  

 


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Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

03.07.2003 

3-4

RMH760

RMZ782

RMZ781

31

31

S

24

 

3-5

31

3

1S

27

RMH760

RMZ781

RMZ783

RMZ782

For minimum limitation of the boiler return temperature, basic types 4–x have their own 
mixing circuit.  
 

For minimum limitation of the boiler return temperature, basic types 4–x have their own 
mixing circuit 

31

31

S

28

RMH760

RMZ782

RMZ781

4-0

 

31

3

1S

31

RMH760

RMZ782

4-1

RMZ781

RMZ783

 

 

 

RMH760

RMZ782

4-2

31

31

S

29

RMZ781

 

RMZ782

RMZ781

4-3

RMH760

31

31

S

32

RMZ783

 

 

31

3

1S

30

RMZ782

RMH760

RMZ782

4-4

RMZ781

 

 

 

 

31

31

S

33

RMZ782

4-5

RMZ781

RMZ782

RMH760

RMZ783

 

Mechanical design 

The controller consists of terminal base and controller insert. It has a plastic housing 
with the printed circuit boards, 2 terminal levels and carries the connecting elements 
(electrical and mechanical) for an extension module. 
The controller can be fitted to a top hat rail conforming to EN 60 715-TH35-7.5, or can 
be mounted directly on a wall.  

Basic types 4–x 

Basic design 

 


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Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

03.07.2003 

Operation takes place with either a plug-in type or detached operator unit (refer to sec-
tion "Type summary").  
 

3144Z

01

1

2

3

4 5

6 7

8

5

10

9

11

11

 

1  Connection facility for the service interface (RJ45 socket) 
2  Connection facility for the operator unit (with removable cover) 
3  LED (green) for indication of operation 
4  Fault button with LED (red) for indication of faults and for resetting 
5  Openings for plug-in type operator unit RMZ790 
6  Button for assignment of the device address  
7  LED (red) for indication of the programming process  
8  Mounting facility for fitting the controller to a top hat rail 
9  Fixing facility for a cable tie 
10  Electrical and mechanical connection elements for the extension module 
11  Rest for the terminal cover 

Engineering notes 

• 

The controller operates on AC 24 V. Operating voltage must conform to the require-
ments of SELV/PELV (safety extra low-voltage) 

• 

The transformers used must be safety isolating transformers featuring double insula-
tion to EN 60 742 or EN 61 558-2-6; they must be suited for 100 % duty 

• 

Fuses, switches, wiring and grounding must be in compliance with local regulations 

• 

Sensor wires should not be run parallel to mains carrying cables powering actuators, 
pumps, etc. 

• 

The controller can be used with a 

maximum of 4

 extension modules  

• 

The reference room for control with a room temperature sensor should be the room 
that cools down quickest. That room may not be equipped with thermostatic radiator 
valves; manual valves must be locked in their fully open position 

Mounting and installation notes 

• 

Controllers and extension modules are designed for: 

− 

Mounting in a standard cabinet as per DIN 43 880 

− 

Wall mounting on an existing tophat rail (EN 50 022-35×7.5) 

− 

Wall mounting using two fixing screws 

− 

Flush panel mounting 

• 

Not permitted are wet or damp spaces. The permissible environmental conditions 
must be observed 

• 

If the controller shall not be operated inside a control panel, use the detached opera-
tor unit RMZ791 in place of the plug-in type operator unit RMZ790  

• 

Disconnected the system from the power supply prior to mounting and installation 
the controller 

• 

The controller insert may not be removed from the terminal base!

  

• 

If extension modules are used, they must be attached to the right side of the control-
ler in the correct order. This means in agreement with ascending type reference 

Operating, indicating 
and connecting ele-
ments 

 


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Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

03.07.2003 

numbers:  
RMH760 – RMZ781 – RMZ782 – RMZ782 – RMZ783 – RMZ786 – RMZ787 – 
RMZ788.  

• 

The extension modules require no wiring between one another or to the controller; 
the electrical connections are made automatically when attaching the modules. If it is 
not possible to arrange the extension modules side by side, the first of the detached 
modules must be connected to the last previous module or to the controller using the 
RMZ780 module connector. In that case, the maximum cable length is 10 m  

• 

All connection terminals for protective extra low-voltage (sensors, data bus) are lo-
cated in the upper half of the unit, those for mains voltage (actuators and pumps) at 
the bottom  

• 

Each terminal (spring cage terminal) can accommodate only one solid wire or one 
stranded wire. For making the connections, the cables must be stripped for 7 to 
8 mm. To introduce the cables into the spring cage terminals and to remove them, a 
screw driver size 0 or 1 is required.  
Cable strain relief can be provided with the help of the fixing facility for cable ties  

• 

The controller is supplied complete with Installation Instructions and Operating In-
structions  

Commissioning notes 

• 

The operator unit can be removed and plugged in or connected while the controller is 
in operation  

• 

For commissioning, there are several auxiliary functions available (refer to “Service 
and operating functions”)  

• 

Commissioning is carried out with the RMZ79… operator unit or the OCI700.1 ser-
vice tool 

Disposal notes  

Larger plastic parts carry material identifications conforming to ISO/DIS 11 469 to facili-
tate environment-compatible disposal.  

Technical data 

Power supply (G, G0) 

Rated voltage 

 

Safety extra low-voltage (SELV) / Protective extra low-
voltage (PELV) to 

 

Requirements for external safety isolating transformer 
(100 % duty, max. 320 VA) to 

AC 24 V 

±

20 % 

 
HD 384 
 
EN 60 742 / EN 61 558-2-6 

Frequency 50/60 

Hz 

Power consumption (excl. modules) 

12 VA 

Supply line fusing 

10 A max. 

 

 

Reserve of clock 

12 h 

 

 

Sensors 
 Passive 
 Active 

 
1 or 2 LG-Ni 1000  
DC 0…10 V 

Signal sources  
 Passive 
 Active 

 
0…2500 

 

DC 0…10 V 

 

 

Contact sensing 
 Voltage 
 Current 

 
DC 15 V 
5 mA 

Requirements for status and impulse contacts 
 Signal 

coupling 

 Type 

of 

contact 

  Insulating strength against mains potential 

 
potential-free 
maintained or impulse contacts 
AC 3750 V to EN 60 730 

Functional data 

Analog inputs 
(B…, X…) 

Digital inputs (X…) 

31

4

4Z

03

en

Low-voltage side

Mains voltage side

 


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12/16 

Siemens Building Technologies 

Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

03.07.2003 

 

Perm. resistance 
 Contacts 

closed 

 Contacts 

open 

 
max. 200 

 

min. 50 k

 

 

 

Output voltage 

DC 0…10 V 

Output current 

±

1 mA 

Max. load 

continuous short-circuit 

 

 

External supply line fusing 

Non-renewable fuse (slow) 
Automatic line cutout  
Release characteristic

 

 
max. 10 A 
max. 13 A 
B, C, D to EN 60 898 

Cable length 

max. 300 m 

Relay contacts 
 Switching 

voltage 

 AC 

current 

  – At 250 V 
  – At 19 V 
 Switch-on 

current 

 
max. AC 265 V / min. AC 19 V 
max. 4 A res., 3 A ind. (cos 

φ

 = 0.6) 

min. 5 mA  
min. 20 mA  
max. 10 A (1 s) 

Contact life at AC 250 V 

At 0.1 A res. 
At 0.5 A res. 
 
At 4 A res. 
 
Red. factor at ind. (cos 

φ

 = 0.6) 

guide values: 
2×10

7

 cycles 

4×10

6

 cycles (N. O.) 

2×10

6

 cycles (changeover) 

3×10

5

 cycles (N.O.) 

1×10

5

 cycles (changeover) 

0.85 

Insulating strength 

 

Between relay contacts and system electronics (reinforced 
insulation)  

 

Between neighboring relay contacts (operational insulation), 
Y1 

 Y2; Q1 

 Q7  

 

Between relay groups (reinforced insulation), 
(Y1, Y2) 

 (Q1, Q7) 

 
 
AC 3750 V, to EN 60 730-1 
 
AC 1250 V, to EN 60 730-1 
 
AC 3750 V, to EN 60 730-1 

 

 

Voltage 

AC 24 V 

Power supply external 
devices (G1) 

Current  

max. 4 A 

 

 

Konnex bus 

Type of interface 
Bus loading number 
Bus power supply (decentral, can be switched off) 
Power failure of short duration to EN 50 090-2-2 

 
Konnex-TP1 
2.5 
25 mA 
100 ms with 1 extension module 

Extension bus 
 Connector 

specification 

  Number of plugging cycles  

 
4 contacts SELV/PELV 
max. 10 

Service tool connection facility RJ45-connector 
 

 

For passive measuring and positioning signals 
   LG-Ni 1000 
 0…1000 

 

 1000…1235 

 

 Contact 

sensing 

 
max. 300 m 
max. 300 m 
max. 300 m 
max. 300 m 
(measuring errors can be corrected 
on the "Settings > Inputs" menu) 

For DC 0…10 V measuring and control signals 

refer to Data Sheet of the signal 
delivering device 

For Konnex bus 
 Type 

of 

cable 

max. 700 m 
2-core without screening, twisted 
pairs 

 

 

Connection terminals 
 For 

wires 

  For stranded wires without ferrules 
  For stranded wires with ferrules 

spring cage terminals 
0.6 mm dia. …2.5 mm

2

 

0.25…2.5 mm

2

 

0.25…1.5 mm

2

 

 

Connection facility for Konnex bus 

wires cannot be interchanged 

 

 

Positioning output Y9 

 

Switching outputs 
(Q…) 

Interfaces 

Perm. cable lengths 

Electrical connections 

 


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13/16 

Siemens Building Technologies 

Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

03.07.2003 

Degree of protection of housing to IEC 60 529 

IP 20 (when mounted) 

Safety class to EN 60 730 

device suited for use with equipment 
of safety class II 

 

 

Operation to 

Climatic conditions 
  Temperature (housing and electronics) 
 Humidity 
Mechanical conditions 

IEC 60 721-3-3 
class 3K5 
0 …50 °C 
5…95 % r. h. (non-condensing) 
class 3M2 

Transport to 

Climatic conditions 
 Temperature 
 Humidity 
Mechanical conditions 

IEC 60 721-3-2 
class 2K3 

25…

+

70 °C 

< 95 % r. h. 
class 2M2 

 

 

Mode of operation, automatic controls 

type 1B 

Degree of contamination, controls’ environment 

Software class 

Rated surge voltage 

4000 V 

Temperature for ball-pressure test of housing 

125 °C 

 

 

Terminal base 

Polycarbonate, RAL 7035 (light-gray) 

Controller insert 

Polycarbonate, RAL 7035 (light-gray) 

Packaging corrugated 

cardboard 

 

 

Product safety 

Automatic electrical controls for household and similar use  
Special requirements for energy controllers  
Home and Building Electronic System (HBES) 

 
EN 60 730-1 
EN 60 730-2-11 
EN 50 090-2-2 

Electromagnetic compatibility 

Immunity (industrial sector) 
Emissions (domestic sector, light industry) 
Home and Building Electronic System (HBES) 

 
EN 61 000-6-2 
EN 61 000-6-3 
EN 50 090-2-2 

-conformity to 

EMC directive 
Low-voltage directive 

 
89 / 336 / EEC 
73 / 23 / EEC 

-conformity to  

Australian EMC Framework 
Radio Interference Emission Standard 

 
Radio communication act 1992 
AS / NZS 3548 

 

 

Excl. packaging 

0.404 kg 

 

Connection terminals  

 
 

Terminal Function 

Voltage 

 

Operating voltage for controller incl. all external units 

AC 24 V 

G1 

Output voltage for external active units 

AC 24 V 

G0 

System neutral 

AC 24 V 

Ground for active and passive sensors 

– 

N1 

Auxiliary terminal for 3-position actuators  

AC 24…230 V 

 

Terminal  Measuring variable   Signal source 

Measuring range

B1 

Flow temperature 

1 or 2 sensors LG-Ni 1000 

–50…+150 °C 

B9 Outside 

tempera-

ture 

1 sensor LG-Ni 1000 or NTC 575  –50…+50 °C 

CE+ Bus 

data 

CE– Bus 

ground 

Konnex bus 

 

 

Degrees of protection 

Environmental condi-
tions 

Classifications to EN 60 
730 

Materials and colors 

Norms and standards 

Weight  

Configured connection 
terminals 

For the power supply 

For the sensors and the 
data bus 

 


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14/16 

Siemens Building Technologies 

Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

03.07.2003 

 

Terminal  Function 

Signal receiver 

Type of contact 

Y13 

Input for Y14 

Y14 

Mixing valve opens 

3-position actuator 

N.O.  

Y23 

Input for Y24 

Y24 

Mixing valve closes 

3-position actuator 

N.O.  

Q13 

Input for Q14 

Q14 Heating 

circuit 

pump on  

Heating circuit pump M1 

N.O.  

 

 
 

Analog input signals 

Measuring variable, function 

Signal source 

Range 

Return temperature  

1 or 2 sensors LG-Ni 1000 

–50…+150 °C 

Wind speed  

Wind effect sensor 0…20 m/s 

DC 0…10 V 

Intensity of solar radiation  

Solar impact sensor 0…1000 W/m

2

 DC 

0…10 

Room temperature 

1 or 2 sensors LG-Ni 1000 

–50…+50 °C 

Room temperature setpoint 

Room unit QAA25 

5…35 °C 

Room temperature setpoint 

Remote setpoint adjuster BSG21.1 

0…50 °C 

Room setpoint readjustment  

Room temperature sensor QAA27 

±3 K 

Room setpoint readjustment 

Remote setpoint adjuster BSG21.5 

±3 K 

Heat demand 

Consumer  

DC 0…10 V 

 

Digital input signals 

Function, variable 

Signal source  

Range 

Room operating mode 

External contact 

On / off  

Timer function 

External contact 

On / off 

Heat demand 

External contact 

On / off 

Special day  

External contact 

On / off  

Holidays 

External contact 

On / off 

Error message 1 

External contact 

On / off 

Error message 2 

External contact 

On / off  

Error message 3 

External contact 

On / off 

Error message 4 

External contact 

On / off 

 

Type of signal  

Signal receiver  

Range 

Positioning signal  

Modulating actuator 

0…100 % 

Heat demand 

Primary controller 

Configurable 

 

Changeover to connection Q71–Q74 … 

Rated voltage range 

in the event of an urgent error message  

AC 24…230 V 

in the event of an error message that is not urgent 

AC 24…230 V 

when reaching the heating limit of heating circuit 1 

AC 24…230 V 

when reaching the heating limit of heating circuit 2 

AC 24…230 V 

during occupancy time of heating circuit 1 

AC 24…230 V 

during occupancy time of heating circuit 2 

AC 24…230 V 

when the outside temperature falls 

AC 24…230 V 

when there is a heat demand  

AC 24…230 V 

For the actuating devices 

Configurable connection 
terminals 

X3, X4 and X5 for input 
signals  

Y9 for continuous output 
signal DC 0…10 V  

Q71 / Q72 / Q74 for 
changeover contacts  

 


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15/16 

Siemens Building Technologies 

Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

03.07.2003 

Connection diagrams 

Low-voltage side  

SP

M

SN

B1

B1

B

M

G

G0

N1

31

3

1A

01

M

X5

AC

 2

4 V

X3

M

B9

B9

B

M

X3

M

B

X4

B

M

X4 M

X5

G8 M

G1 M

B7

Y9

Y9

G1 G0

CE-

CE+

A1

1

2

G1

 

 

 

Averaging  

SP

M

SN

B1

B11

B

M

G

G0

31

31

A

03

AC

 2

4 V

M

X3

B12

B

M

N1

X31

B

M

X32

B

M

 

 

 

A1 

Room unit QAW740 

B1 

Flow temperature sensor, e.g. QAD22  

B11, B12  E.g. 2 flow temperature sensors for averaging  
B9 

Outside sensor, e.g. QAC22  

N1 

Heating controller RMH760 

X3 

E.g. room temperature sensor (configurable input) 

X31, X32  E.g. 2 room temperature sensors for averaging 
X4 

E.g. return temperature sensor (configurable input) 

X5 

E.g. solar impact sensor QLS60 (configurable input) 

Y9 

E.g. actuator with DC 0…10 V input (configurable output) 

 

Y14

Y24

Y1

N

Y2

Y13

Y23

Y1

M1

Q14

Q74

Q72

Q13

Q71

A

C

 24

...230 V

L

N

N1

31

31

A

0

2

N1

 

M1 

Heating circuit or system pump 

N1 

Heating controller RMH760 

Y1 Actuator 

 
 
 
 
 
 
 
 
 
 

Mains voltage side 

 


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16/16 

Siemens Building Technologies 

Data sheet RMH760 

 

CE1N3131en 

HVAC Products 

 

03.07.2003 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

Dimensions 

3

80

3

35

5

31

44

M

01

=

=

66

,4

173

153

=

=

90

45

18

RMZ790

10,

5

5
3

5,

2

2

ø

ø

EN 60 715-TH 35-7.5

44

 

Dimensions in mm

 

2003 Siemens Building Technologies Ltd  

Subject to alteration