Watson-Marlow Qdos30 Universal - Manual (Page 18)

Watson-Marlow qdos30 Universal and Universal+ Pump User Manual 18
11.2 Optional input lead
Input lead length: 3m (10ft)
Brown
White
Blue
Black
Grey
Blue
insert
Remote stop
Applying a 5V to 24V signal to pin 1 will STOP the pump in all operating modes. In
manual and analogue mode, the pump will start when the signal is removed.
External contact
Digital pulse input min. 5V, min. pulse duration 40ms. This input is used to trigger a
user defined dose size. Refer to the contact mode section.
Speed: analog input
The speed of this pump can be controlled remotely by a current analog signal within
the range 4-20mA.
The analog signal must be applied to pin three of the M12 input connector. The pump
will provide an increasing speed for a rising control signal.
The Universal+ model can be calibrated by the user to control the speed proportionally
or inversely proportional to the input mA signal.
4-20mA circuit impedance: 250Ω.
Inverting the response is set up in software. Do not invert the
polarity of the terminals. If the polarity is inverted the motor will
not run.
Remote fluid recovery
When remote fluid recovery is enabled in fluid recovery settings, the user will be able
to reverse the pump remotely by supplying a signal to pin five. This will only work
in Analog 4–20mA mode when a 4–20mA signal is received and there is no remote
STOP signal.