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10. Electrical connections
Notice:
The shield of the connecting cable is electrically connected to the plug housing.
The unit ensures safe operation if connecting cables with a maximum length of 3 m are
used. The use of longer cables does not affect proper performance of the unit, however
external interferences may have a negative impact on safe operation.
5
1
9
6
RS232C
Accessories:
Order No.
8 980 073
8 900 110
3
1
2
11. Remote control
11.1. Setup for remote control
5
1
9
6
RS232
24
Use shielded cables only.
RS232 serial interface
This port can be used to connect a computer with an RS232 cable for remote
control of the recirculating cooler.
Pin assignments:
Pin 2
RxD
Pin 3
TxD
Pin 5
0 V
Pin 7
RTS
Pin 8
CTS
Pin 1; 4; 6, 9 Reserved - do not use!
Description
RS232 interface cable 9-pol./9-pol. , 2,5 m
USB interface adapter cable
Alarm output
Potential-free change-over contact for external alarm signal.
Pin 2 and 3 are connected in case of an alarm.
Pin 2 and 1 are connected in normal condition or mains switch "Off".
Switching capacity
Switching voltage
Switching current
Check the interface parameters for both interfaces (on recirculating cooler and
PC) and make sure they match.
Interface parameters are pre-determined.
RS232
Type
4800 bauds
Baudrate
even
Parity
hardware handshake
Handshake
Receive Data
Transmit Data
Signal GND
Request to send
Clear to send
max.
30 W / 30 VA
max.
30 V∼/−
max.
1 A
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