Watson-Marlow 520Du - Manual (Page 45)

Watson-Marlow 520Du User Manual 45
18.10 Outputs
The 520Du pump offers four digital status outputs. See 12 Switching the pump on
for the first time for initial start-up defaults. Each of five parameters can be config-
ured 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.
Output 1 and output 2 are available in two formats:
1. From pins 10 and 11, lower D-connector, as 5V TTL signals.
2. 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.