Aalborg PWE Digital - Manual (Page 9)

Flow 0-5 VDC or 4-20 mA output signal connection:
Pin M ------------ (+) Plus Flow Analog Output
Pin K ------------ (-) Minus Flow Analog Output
Temperature 0-5 VDC or 4-20 mA output signal connection (optional):
Pin L ------------ (+) Plus Temperature Analog Output
Pin K ------------ (-) Minus Temperature Analog Output
To eliminate the possibility of noise interference, use a separate cable entry for
the DC power and analog signal lines (pins L, M, K on “M16” connector).
2.2.3 Flow Sensor Pulse Output Signals
Connections
Pin C ------------ (+) Flow Sensor Pulse Output (active), 3.3Vdc
Pin B ------------ DC Power (-), Digital Common
4
WARNING: Observe jumper configuration before connecting 4-20 mA
current loop load. Failure to make proper jumper configuration (see
Figure 5-1) may cause damage for output circuitry.
Do NOT connect an external voltage source to the output signals.
ƽ
WARNING: The flow sensor pulse output is self-powered (open drain,
pulled up with 10K resistor to internal 3.3Vdc rail).
Do NOT connect an external voltage source to the pulse output signals.
Use load with input impedance more than 30K is recommended.
ƽ