APG PT-400 Pressure Transducer user manual - Manual (Page 6)

PT-400 Rev. C, 4/13
6
Automation Products Group, Inc.
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Power supply voltage must be sufficient to maintain a minimum of 9 VDC at
the transducer/transmitter terminals after “dropping” voltage across RL at full
scale current (20 mA), see Figure on page 6. Example: If RL = 250 ohm then
“drop” is 0.02 Amps X 250 ohm = 5 volts. Therefore power supply minimum is
5 V + 9 V = 14 V
4. Wiring Information
Below, and on the next page, are the pin out diagrams, circuit diagrams, and
pin out table for the 4-20 mA, 0-5 VDC and 0-10 VDC circuits, as needed to
assist you in wiring your transducer.