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Operating and Maintenance Instructions – 7 Hardware and software
Rittal Liquid Cooling Package Plus
Fig. 65:
Control unit of the Liquid Cooling Package Plus (Basic CMC) - rear
1
Sockets for additional sensors
2
I
2
C socket socket (X 22)
3
Socket for controlling the graphical display (X 24)
4
Alarm relay sockets
5
Network connection (X 23)
6
Power supply (X 21)
Various sockets are found on the rear side of the control unit.
Pin assignment of the sockets for additional sensors:
1
24 V DC
2
Gnd
3
Sensor ID 1
4
Sensor ID 2
5
Analogue input
6
Digital input/output
The 8-pole connector X22 contains the so-called Power-I
2
C bus.
Assignment of the I
2
C bus:
1
- N/C
2
- N/C
3
- N/C
4
- N/C
5
- Gnd
6
- + 24 V DC
7
- P-SDA
8
- P-SCL
The graphical display on the front door is controlled via an RS-232 connection
with the RJ12 socket X24.
X24 pin assignment:
1
24 V DC
2
Gnd
3
TxD
4
RxD
5
RTS
6
CTS
Alarm relay socket pin assignment:
1
24 v DC
2
Gnd- Relay COMMON
3
N/C
4
Relay normally closed
5
Relay common
6
Relay normally open
Power
24 VDC
max. 2,5A
P-I C
2
1
2
3
4
IOIOI
1
1
2
3 4
5
6
