7/11
Siemens
Temperature Controller RRV851
CE1N2725en
Building Technologies
27.08.2007
Technical data
Power supply (L, N)
Rated voltage
AC 230 V, +10 %, –15 %
Requirement for transformers for switch mode
power supplies
EN 61 558-2-6
Frequency
50 / 60 Hz
Power consumption (excl. external modules)
12 VA
Supply line fusing
max. 10 A
Functional data
Reserve of clock
max. 20 min
Analogy input (B1, M)
Passive sensor
NTC resistor, 3 k
Ω
at 25 °C
Measuring range
0…49 °C
Digital input (D1, D2)
Contact sensing
Voltage
Current
max. DC 5 V
typically 8 mA
Requirements for status and impulse contacts
Signal coupling
Type of contact
Insulating strength against main potential
Potential-free
Maintained or impulse contacts
AC 3750 V to EN 60 730
Switching outputs
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
Relay contacts (Y1x, Y2x, Y3x)
Relay output
Switching voltage
AC current
At 250 V
At 19 V
Switch-on current
Contact life
potential-free
max AC 250 V
min. AC 19 V
max. 3 A res., 1 A ind. (cos
φ
= 0.6)
min. 5 mA
min. 20 mA
max. 5 A (1 s)
1 × 10
5
cycles
Boiler (Q1x)
Relay contacts (Q7x)
Relay output
Switching voltage
AC current
At 250 V
At 19 V
Switch-on current
Contact life
potential-free
max. AC 250 V
min. AC 19 V
max. 6 A res., 4 A ind. (cos
φ
= 0.6)
min. 5 mA
min. 20 ma
max. 10 A (1 s)
1 × 10
5
cycles
Insulating strength
Between relay contacts and system electronics
(reinforced insulation)
Between neighboring relay contacts
(operational insulation)
Y1x
⇔
Y2x
⇔
Y3x
⇔
Q7x
⇔
Q8x
⇔
Q9x
AC 3750 V, to EN 60 730-1
AC 1250 V, to EN 60 730-1
Interfaces (S+, SG)
HCC bus
proprietary protocol
Bus power supply voltage
DC 12 V, +10, –15% (supply to room
unit QAX850)
