Watson-Marlow 720UN and 720SN User Manual
11
UN
720UN, IP66 NEMA 4X model
This pump can be controlled from the keypad or remotely. It features:
Manual control
Speed adjustment; run and stop; direction control; keypad scaling; “max” key
for rapid priming.
Remote control
The pump can be digitally controlled with a contact closure or logic input signal.
Analogue control
The pump speed can be controlled through an analogue signal input in the
ranges 0-10V, 1-5V or 4-20mA.
Outputs
A 0-10V or 0-768Hz output signal provides feedback of the pump speed. There
are four relay status outputs which can be configured in software for a variety of
pump parameters.
MemoDose
Allows repeat dosing. Stores in memory a pulse count from the motor. This
count is repeated each time
START
is pressed to provide a single-shot dose.
Calibration
Uses the same pulse count as MemoDose. The corresponding pumped volume
can be entered to calibrate the flow of the pump.
Guard switch
Primary operator protection from rotating parts of the pump is provided by the
pumphead track. Secondary operator protection from rotating parts of the pump
is provided by indicator-only switching of the pumphead track.
720SN, IP66 NEMA 4X model
This pump operates by manual control only. There are no external control connec-
tions. All pump functions are controlled from the keypad. It features:
Manual control
Speed adjustment; run and stop; direction control; "max" key for rapid priming.
MemoDose
Allows precise repeat dosing. Stores in memory a pulse count from the motor.
This count is repeated each time
START
is pressed to provide a single-shot
dose.
Calibration
Uses the same pulse count as MemoDose. The corresponding pumped volume
can be entered to calibrate the flow of the pump.
Guard switch
Primary operator protection from rotating parts of the pump is provided by the
pumphead track. Secondary operator protection from rotating parts of the pump
is provided by indicator-only switching of the pumphead track.
SN
