JULABO FLW11006 Recirculating Coolers - Manual (Page 26)

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10. 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.
RS232 serial interface
This port can be used to connect a computer with an RS232 cable for remote
control of the recirculating cooler.
9 6
5 1
RS232C
Pin assignments RS232:
Pin 2 RxD Receive Data
Pin 3 TxD Transmit Data
Pin 5 0 V Signal GND
Pin 7 RTS Request to send
Pin 8 CTS Clear to send
Pin 1; 4; 6, 9 Reserved - do not use!
Accessories:
Order No. Description
8 980 073 RS232 interface cable 9-pol./9-pol. , 2.5 m
8 900 110 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".
or
Switching capacity
max. 30 W / 30 VA
Switching voltage max. 30 V
/
Switching current max. 1 A