Watson-Marlow Qdos30 Universal - Manual (Page 26)

Watson-Marlow qdos30 Universal and Universal+ Pump User Manual 26
Speed: analogue output (J1) (Universal+ only)
A current analogue signal within the range 4-20mA is
available between the O/P (output) terminal and the GND
terminal. The current is fixed and directly proportional to
the pump speed. 20mA = maximum speed, 4mA = zero
speed.
4-20mA
0/P
GND
1
2
J1
Note: If the mA output is to be used for reading from a multimeter (set on mA), a
250Ω resistor is required in series.
Earth shielding terminals
4.8mm spade terminals are supplied for earth shielding
of cables. The input cable and output cable earths can
be connected to either terminal.
Keep 4-20mA and low voltage signals separate from mains power.
Use separate glanded input cables.