Watson-Marlow 620U User Manual

Page 10

Watson-Marlow 620UN, 620U, 620SN, 620S User Manual

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: