14 SWIFT® Smart Wireless Integrated Fire Technology Manual — P/N LS10036-000SK-E:G 4/13/2020
WSK-WGI Wireless System Gateway Mounting and Wiring
2.7.3 Gateway Powered by the SLC
To power the gateway using the signaling line circuit, connect the gateway as described in the table and graphic below:
The gateway provides isolation of short circuits on the SLC in Class A (Style 6) installations. SLC connections are power-limited by the
panel. An interruption in the SLC that causes a loss of power at the gateway for more than 100ms may result in a trouble condition and
loss of fire protection provided by the wireless devices for approximately 15 minutes. Use of an external +24V power source (not SLC
power) is recommended for installations that require fire protection in the presence of short circuits, including Class A applications and
applications that use isolator modules.
2.7.4 Gateway Powered by an External, Regulated +24VDC Source
To power the gateway using an external, regulated +24VDC source, connect the gateway as described in the table and drawing below.
Terminal
Pins
Description
A5 and A7 SLC - (Common) & SLC Output +
A5 and A6 SLC - (Common) & SLC Input +
A4 and A5 Jumper selection to enable power from the SLC supply. (Insert Jumper when using SLC power.)
A3 Unused
A1 and A2 Jumper selection to enable power from the SLC supply. (Insert Jumper when using SLC power.)
Figure 2.6 Wiring Connections: WSK-WGI Powered by the SLC
SLC out to next device (Class B)
or SLC return to FACP (Class A)
SLC in from FACP/device
jumpers
2.5.wmf
NOTE: Use of the same wire gauge is recommended if there are multiple connections to the same terminal.
Terminal Pins Devices Powered
A5 & A7 SLC Output
A5 & A6 SLC Input
A4 Unused
A2 & A3 +24VDC input. Voltage range from +18VDC to +30VDC.
Use only power-limited device circuits.
A1 Unused
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