4: Gateway Powered By An External, Regulated +24Vdc Source - Johnson Controls SWIFT Instruction Manual

JFWSG FlashScan Wireless System Gateway
SLC out to next device (Class B)
or SLC return to FACP (Class A)
NOTE: Use of the same wire gauge is recommended if there are multiple connections to the
same terminal.
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 pres-
ence of short circuits, including Class A applications and applications that use isolator modules.
Refer to the SLC Wiring Manual for more information on wiring using isolators.
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.
16 SWIFT™ Smart Wireless Integrated Fire Technology Manual — P/N LS10036-000JC-E:C 5/8/2015
+
-
+
SLC in from FACP/device
-
jumpers
Figure 2.6 Wiring Connections: JFWSG Powered by the SLC
Terminal Pins
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
Devices Powered
Mounting and Wiring