Pin
No.
Function
Specification
Output
lead
colour
3
Analog out
4-20mA into 250Ω (referenced to pin 4)
Blue
4
GND
Black
5
Supply
Pin 5 supply voltage is 5V with impedance of 2.2k, this can be
connected via a NO switch to input pin 1 or 2 to power the inputs.
Grey
Example wiring for a "pull up resistor"
Diagram depicts either Alarm or Run Stop output.
+24VDC
INPUT
COMMON
PLC
2K2 Typical
1K2 Minimum
qdos
Example wiring for an external relay, the N/O or N/C contacts could be used for any device
Diagram depicts either Alarm or Run Status output.
qdos
+24VDC
Common
PLC
2K2 Typical
1K2 Minimum
1A 100V
The resistor or relay needs to be sized correctly to ensure no damage
to the pump transistors. Damage incurred due to incorrect sizing or
installation will not be covered by warranty.
These solutions require external 24V power. If connecting to a PLC 24V is usually available.
Alarm Output (Output 1)
Alarm conditions are generated by system errors or leak detection.
Run Status Output (Output 2)
This output changes state when the motor starts/stops.
Speed: analog output—Un and Remote models only
A current analog signal within the range 4-20mA into 250Ω impedance is available between
pin three and pin four of the output connector. The current is fixed and directly proportional
to the pumphead rotation speed. 4mA = zero speed; 20mA = maximum speed.
m-qdos-en-02
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