P3 - Pakscan Master Station Technical Manual
16 of 136 Publication PUB059-002-00 Issue 06/15
1.9 P3W Repeater and P3W WMA 24VDC Connections
The P3W WMA DC may be powered from the Modbus device to which it is connected, assuming the
device has the appropriate DC supply available. Under this circumstance the interconnection cable
between the device and the P3W WMA-DC should contain 2 shielded pairs, one for power supply and
one for the communication signal. In this case, the distance between the Modbus device and the P3W
WMA-DC should not exceed 10 meters.
The P3W repeater DC may also be powered from an external DC supply in the same way.
Connect the power cable as shown below, the connector labelled SK3A is used on the P3W WMA-DC
and P3W repeater-DC.
The power supply should be nominally 24volts (range 9-35volts, suggested power supply current
capabilities – 200mA)
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