Watson-Marlow 720DuN User Manual 27
14.5 Keypad beep
The pump keypad can operate silently or indicate a positive key-press with a beep
sound.
To toggle the sound on and off, stop the pump. Turn off the mains power switch
at the rear of the pump.
Depress the UP and 1 (DIRECTION) keys while switching on the mains power
switch at the rear of the pump. See 18.21 Beep.
14.6 Manual operation and remote digital
inputs and outputs
The remote run/stop, direction and leak-detected inputs are operational.
The remote status outputs are all fully functional.
The STOP key acts as an emergency stop. The run/stop input will not start the pump
in manual mode, but once the START key has been pressed, the remote run/stop
input will stop and start the pump according to its operational state.
(720DuN) If you invert the operation of the remote run/stop switch to operate as
open=stop, you must connect the +5V terminal to the i/p terminal on the Run/stop
input connector (J4), to be able to start the pump from the keypad. See 22.7
Run/stop input.
If STOP is pressed the remote run/stop switch will have no effect.
You cannot invert the polarity of the remote direction signal.
14.7 Backlight
To turn the display backlight on:
Depress the STOP and UP keys together.
To turn the display backlight off:
Depress the STOP and DOWN keys together.
See 18.17 Backlight.
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