Watson-Marlow 720DuN User Manual
68
Important: general instructions for remote control inputs
All remote control inputs can be wired in two ways:
Logic
A logic voltage between 5V TTL and 24V industrial logic may be wired
to the input. The pump is configured to operate without modification
anywhere in this range. Any of the 0V terminals - though preferably
the 0V terminal associated with the desired input - is connected to the
control device’s 0V to make the circuit. Low is equivalent to 0V. High is
equivalent to 5V
→
24V.
Switch
A remote switch may be connected between the input and any positive
voltage supply from the pump - though preferably the associated sup-
ply terminal. Do not use the 10V supply from the Rem-pot connector,
however.
22.7 Run/stop input
Remote run/stop: connect a remote switch between the
i/p
terminal and the
+5V
terminal of the Run/stop i/p connector
(J4). Alternatively a logic input may be applied to the
i/p
ter-
minal, ground to the
0V
terminal. High input stops the pump,
low input runs the pump. With no connection or with the
switch open, the pump will default to running. To change or
set the sense of the run/stop input, see 18.11
Remote stop
in the Setup menu.
22.8 Direction input
To enable remote direction control and disable the
DIRECTION (SHIFT, 1)
key on
the keypad, link the terminals of the Direction enable link connector (J6).
Important: Apply no voltage whatever to the Direction enable link.
Connect
a remote switch between the
+5V
terminal and the
i/p
terminal of the Direction i/p
connector (J2). Open switch for clockwise rotation, closed switch for counter-clock-
wise rotation. Alternatively a logic signal may be applied to the
i/p
terminal and the
0V
terminal of the Direction i/p connector (J2). Low input for clockwise rotation,
high input for counter-clockwise rotation. With no connection the pump defaults to
clockwise rotation.
