Manual

Electrical connections
78
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
/ Control output
The connector may only be used for control of a JULABO refrigerated
circulator or JULABO MVS Solenoid valve controller for cooling water.
Pin assignment:
Pin Signal (only with attached JULABO equipment)
1 +24 V (I max. current 25 mA)
2 0 V
3 Alarm relay
4 Reserved - do not use!
5 Cooling pulse
ALARM
Alarm output
(for external alarm signal)
This potential-free change-over contact is activated in case of an alarm
when pins 2 and 3 are connected.
Switching capacity max. 30 W / 40 VA
Switching voltage max. 125 V/
Switching current max. 1 A
1
2
3
AK
STAND-BY
Stand-by input
(for external switch-off)
Pin assignment: Pin Signal
1 not connected
2 5 V / DC
3 0 V