Watson-Marlow 520Du - Manual (Page 69)

Watson-Marlow 520DuN IP66/NEMA 4X User Manual 69
Connect the cable of a Watson-Marlow Tube monitor leak detector as follows:
Note: Use only a Watson-Marlow 520 series tube monitor.
Important: pump status outputs
All four outputs can be configured in software to output a range of parameters:
see 18.10 Outputs under Setup.
Outputs 1 and 2 are available simultaneously from the upper and lower D-con-
nectors. The outputs from the lower D-connector are backwards-compatible with
505U pumps. They operate at 5V TTL only.
All four outputs available from the upper D-connector are open-collector.
By applying a positive voltage to a maximum of 24V to pin 22 of the upper D-con-
nector, all the outputs from this plug are at that voltage: pin 22 is commoned with
pins 23, 24 and 25. Care must be taken to ensure that the supply voltage has suf-
ficient capability to drive all the loads applied to all outputs used. Important:
The total load of the four logic outputs must not exceed 50mA.
Tube monitor
wire colour Pin number,
upper D connector
Blue 15
Yellow 2
Red 21