Julabo MB Heating Immersion Circulator User Manual download pdf (Page 42)

Electrical connections

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).

/ Control output

The connector may be used for control of JULABO refrigerated

circulators or as output for alarm messages.

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

RS232C

RS232 serial interface

This port can be used to connect a computer with an RS232 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!

RS232 interface cable

Circulator (9-pol) PC (9-pol)

Pin 2 RxD  Pin 3 TxD

Pin 3 TxD  Pin 2 RxD

Pin 5 GND  Pin 5 GND

Pin 7 RTS  Pin 8 CTS

Pin 8 CTS  Pin 7 RTS

Accessories: Order No. Description

8 980 073 RS232 interface cable 9-pol./9-pol. , 2,5 m

8 900 110 USB interface adapter cable

1 2 ... 37 38 39 40 41 42 43 44 45 46 47 48

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Julabo MB Heating Immersion Circulator User Manual Page 42