Watson-Marlow 520DuN IP66/NEMA 4X User Manual
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14.2 Keypad lock
The keypad can be locked to prevent changes to pump speed or other settings, and
make it possible only to start or stop the pump. The padlock symbol shows on the
display.
While the pump is running, hold down the
START
key for two seconds. The
padlock symbol shows and only the
START
and
STOP
keys function.
The keypad may also be locked while the pump is stopped. Hold down the
STOP
key for two seconds. The padlock symbol shows and only the
START
and
STOP
keys function.
To unlock the keypad while the pump is running hold down the
START
key for
two seconds. The padlock symbol is removed. If the pump is stopped hold
down the
STOP
key until the padlock symbol is removed.
14.3 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
DIRECTION
keys while switching on the mains power
switch at the rear of the pump.
14.4 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 overriding 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.
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.
If
STOP
is pressed the remote run / stop switch will have no
effect.
You cannot invert the polarity of the remote direction signal.
