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Watson-Marlow 620DuN and 620Du User Manual 41
Leak detected
When used with a leak detector, this output provides an alarm when the pump
has been automatically switched off following tube failure.
Head
Provides an alarm when the pumphead guard is open. If it is running, the
pump will stop.
Outputs 1-4 are available as single-pole change-over relay contacts: Relay 1, 2, 3
and 4. Connect to the normally open or normally closed contacts of the relay as
required and configure the pump’s software accordingly. See below in this section.
Note: The maximum rating on the relay contacts of this pump is 30VDC; maximum
load 30W.
Output 1 and output 2 are available in two formats:
From pins 10 and 11, lower D-connector, as 5V TTL signals.
From pins 10 and 11, upper D-connector, as open collector logic outputs.
Output 3 and output 4 provide open collector logic outputs from pins 13 and 12,
upper D-connector, respectively.
A supply voltage from the pump (5V, 10V, 12V) or user-supplied up to 30V to pin
22, upper D-connector, provides the voltage level for these logic status outputs.
DuN
Du
DuN, Du