Electrical connections
50
11. Electrical connections
Notice:
Use shielded cables only.
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.
/ Control output
The
connector may be used for control of JULABO
refrigerated circulators or as output for alarm messages.
13
2
4
5
Circuit: Operation = relay powered
Alarm = relay not powered
Pin assignment:
Pin Signal
1 +24 V (I max. current 25 mA)
2 0 V
3 Alarm relay
4 Reserved - do not use!
5 Cooling pulse
RS232 serial interface
This port can be used to connect a computer with an RS232
cable for remote control of the circulator.
1
RS232C
Pin assignments RS232:
Pin 2 RxD Receive Data
Pin 3 TxD Transmit Data
Pin 5 0 V Signal GND
Pin 6 DTR Data terminal ready
Pin 7 RTS Request to send
Pin 8 CTS Clear to send
Accessories: Order No. Description
8 980 073 RS232 interface cable 9-pol./9-pol. , 2,5 m
8 900 110 USB interface adapter cable
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