Watson-Marlow 720DuN User Manual 11
720DuN, 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. Scaling can be controlled similarly using
Analogue signal input 2.
Outputs
A 0-10V, 4-20mA 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
Full calibration with default figures for a range of pumpheads and tubes.
Calibration dose facility.
Serial communications
Full pump control from a PC or other controller via RS485 with the ability to
network up to 32 pumps.
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.
PIN-secure process protection
Two levels of control protection: main PIN code and user PIN code.
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