W-PFS Wiring Support

Electrical Installation

Units with the part number suffix 220vac are powered by 220-240v 50Hz 1ph AC.

Units with the part number suffix 110vac are powered by 100-115v 60Hz 1ph AC.

Units with the part number suffix 24vdc are powered by 24v DC

Units with the part number suffix 12vdc are powered by 12v DC

Each unit is supplied with a flying lead for mains power connection.

This flying lead should be connected to a user-installed isolating fused spur, using standard EU wiring as follows:

AC power 
Live Brown 
Neutral Blue 
Earth Yellow/Green

Note 110v units can be supplied with US/N.American wiring standard colours on request

The systems can run autonomously with just the power connection. However, should you require it, the following BMS/Remote connections can also be made.

W-PFS range

BMS output connections

Q2 is a user definable output which can be set to represent any of the internal status messages, e.g. paused, running, service due, etc.
Q3 is a dedicated healthy/ready signal (closed = healthy/ready, open = active service requirement or system paused)
Q5-Q8 These four BMS outputs are used to produce a data word, giving 16 different status messages. These outputs are volt free contact pairs and are to be read together. In other words, all 4 must be connected to accurately read this BMS output.

BMS inputs connections

I7 External run (BMS run signal) Connect the system’s internal 24v DC connection to run
I8 External pause (BMS pause signal) Connect the system’s internal 24v DC connection to pause

WB range

BMS output connections

Q4 is the alarm output

BMS inputs connections

A1 External run (BMS run signal) Connect the system’s internal 24v DC connection to run
A2 External pause (BMS pause signal) Connect the system’s internal 24v DC connection to pause

Please refer to your manual for fuse sizes and power requirements. Contact us if you do not have a copy of your manual