User Manual

9/14
Siemens Non-communicating room controllers CA2N3881en_02
Building Technologies RXA20.1, RXA21.1, RXA22.1 2012-08-28
Connection terminals and operator controls
00601 a
1 2 3 4 5 6 7 8 10 11 12 13
M
D1 GND D2
Y1 G Y2
B1
12
QAX...
T
M
25 26 27 28
Q13 Q14
Y3 G
Y4
M
Q24 Q34
5(4) A
14 15 16
CP- CP+ M/S
9
X2
D3
T
0...10 V
56784321
ON
DIP
9101112
S 1...12
R1
19 21
N L N
21
L
19
AC 230 V
Measured value inputs
B1 1 Measured value input for LG-Ni 1000v sensor or setpoint adjuster
M 2 Measured value input ground
X2 3 Configurable input for LG-Ni 1000 sensor, setpoint adjuster or 0…10 V signals
Signal inputs
D1 4 Signal input (window or clock)
GND 5 Signal ground
D2 6 Signal input (occupancy)
D3 7 Changeover input
Triac outputs
Y1 8 AC 24 V, 0.5 A switching output
G 9 AC 24 V actuator supply
Y2 10 AC 24 V, 0.5 A switching output
Y3 11 AC 24 V, 0.5 A switching output
G 12 AC 24 V actuator supply
Y4 13 AC 24 V, 0.5 A switching output
Device bus
M/S 14 Master/slave connection
CP– 15 Ground for PPS2 and M/S
CP+ 16 PPS2 (room unit)
Power supply
N 19 Neutral conductor
L 21 Phase conductor AC 230 V +/- 10 %
Relay outputs
Q13 25 Shared contact for Q14, Q24 and Q34
Q14 26 Normally-open contact, max. AC 250 V, 5 (4) A (Stage 1)
Q24 27 Normally-open contact, max. AC 250 V, 5 (4) A (Stage 2)
Q34 28 Normally-open contact, max. AC 250 V, 5 (4) A (Stage 3)
Operator controls
S1...12 DIP switch for configuring the room controller.
R1 Potentiometer for setpoint reset and test purposes.
STOP
Caution Observe the technical data for the relay outputs: max. AC 250 V, 5 (4) A
Local installation regulations must be observed.
RXA21.1
Important