Watson-Marlow 620U - Manual (Page 39)

Watson-Marlow 620UN, 620U, 620SN, 620S User Manual 39
16.4 Outputs
The 620UN pump offers four relay status outputs. See 12 Switching the pump on for
the first time for initial start-up defaults. Each of six parameters can be configured
to any output, or more than one output.
The 620U pump offers four digital status outputs. See 12 Switching the pump on for
the first time for initial start-up defaults. Each of six parameters can be configured
to any output, or more than one output.
The parameters are:
Run/stop
Provides a status output to indicate whether the pumphead is in a running or
stopped condition. When running at 0rpm, the run/stop output indicates run-
ning.
Direction
Provides a status output to indicate which direction the pump is set to run in.
Auto / man
Provides a status output to indicate whether the pump is in analogue control
mode or manual control mode.
General alarm
Provides an alarm output when any system error condition occurs except: leak
detected; analogue signal out of range; analogue over-signal; analogue no sig-
nal.
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.
UN
UN, U
UN
U
U