Watson-Marlow 620U - Manual (Page 10)

Watson-Marlow 620UN, 620U, 620SN, 620S User Manual 10
UN, U 620UN, IP66 NEMA 4X model, and 620U, IP31 model
This pump can be controlled from the keypad or remotely. It features:
Manual control
Speed adjustment; run and stop; direction control; "max" key for rapid prim-
ing.
Remote control
The pump can be digitally controlled with a contact closure or logic input signal
to operate the pump.
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, 4-20mA or 0-1258Hz output signal provides feedback of the pump
speed. There are four digital (620U) or relay (620UN) status outputs which can
be configured in software for a variety of pump parameters.
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
fixed guard. Secondary operator protection from rotating parts of the pump is
provided by indicator-only switching of the pumphead guard.
620SN, IP66 NEMA 4X model, and 620S, IP31 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 prim-
ing.
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
fixed guard. Secondary operator protection from rotating parts of the pump is
provided by indicator-only switching of the pumphead guard.
SN, S