JULABO FW95-SL Ultra-Low Refrigerated Circulators - Manual (Page 82)

Electrical connections
82
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 (e.g. cellular
phones).
4
1
3
2
ext. Pt100
Socket for external Pt100 sensor
1
4
2
3
Shield Plug
Look on
soldering side.
Pt100
Pin assignment:
Pin
Signal
1 I+
2 U+
3 U-
4 I-
The shield of the connecting cable is electrically connected to the plug housing
and the sensor tube.
9 6
5 1
SERIAL
RS232/RS485 serial interface
This port can be used to connect a computer with an RS232 or RS485 cable
for remote control of the circulator.
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!
Pin assignments RS485:
Pin 3
B
Pin 5 0 V Signal GND
Pin 6 +5 V (max. 50 mA)
Pin 8 A
Pin 1; 2; 4; 7; 9 Reserved - do not use!
Notice: RS485 serial interface
The max. load current between pin 5 and pin 6 is 50 mA.