Siemens HOTEL SOLUTION HTC3.1/A Manual page 7

Connection diagrams
Connection
terminals
Wiring diagram
HTC3.1/A
Wiring diagram
HTC3.1S/A
Caution
STOP
Siemens
Building Technologies
1 2 3 4 5 6
1 2 3 4 5 6
S2
1 2 3 4
X12
1 2 5 6
3 4
S2
1 2 3 4
X12
Note the cross-over between pins 3 and 4.
HTC3.1/A, HTC3.1S/A – Room operator units
1 Serial port, RS485+
2 Serial port, RS-485−
3 Working voltage DC 0 V
4 Working voltage DC 12 V
5,6 Connection for 10 kΩ NTC
temperature sensor
S2 Room operator unit, type HTC3.1/A
B1
B1 Temperature sensor, 10
(e.g. HSE1.1, HSE1.2)
N1 HRC3.. room controller
N1
S2 Room operator unit, type HTC3.1S/A
N1 HRC3.. room controller
N1
kΩ
, NTC
7/8
CM2N6319en
31.07.2008