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The Alarm Relay Card is typically used to provide a Brigade Interface. The default
configuration is for the three relays to operate on Fault (Trouble), Isolate (Supervisory)
and Alarm, respectively.
These relays are normally de-energised and energise on the respective status. They have
voltage-free contacts that are connected to two terminals and can be configured as
normally open or normally closed by the positioning of links. Refer to the previous
section for details.
If a normally energized relay is required to provide activation on complete loss of system
power (Standby), the Aux Relay on the SPS can be programmed as normally on and its
contacts connected in series/parallel with the contacts of the Fault (Trouble) relay as is
applicable, i.e., series for normally closed, parallel for normally open. Where the Brigade
interface is powered from the 4100U-S1 and monitored by the central station, this is not
typically required.
Note that if the Aux relay is programmed as normally energised, de-energising on Fault, it
cannot be used to replace the Fault relay on the Alarm Relay Card as the latter is link
connected to a hardware signal of “SPS CPU Fault”, and signals “Fault” when the SPS
loses communications with the CPU.
The 4100U-S1 has specific mounting doors for several types of signaling device. These
must be obtained separately.
FP0935 FP,4100U-S1 1976-174,ASE DOOR KIT
1 x 4U hinged door, with ASE cover and barrel nuts already fitted
1 x 3 way connector and 1 x 2 way connector for connection to the ASE when it is
fitted
1 x FP0740 FAS interface module with red, yellow, blue and white wires
1 x pair of red and black wires for connecting the ASE to the 4100U-S1 DC supply
4 x M6 screws, washers and cage nuts for mounting the door
5 x Cable ties and adhesive cable tie holders for fastening the ASE wiring
1 x green earth lead + nut and washers to earth the door to the expansion bay
2 x M4 x 16 screws and crinkle washers to mount the ASE to the door
FP0937 FP,4100U-S1 1976-174,PPU/AIU DOOR KIT
1 x 4U hinged door with spacer bracket, connector strip, label and wiring already
fitted
4 x M6 screws, washers and cage nuts for mounting the door
5 x Cable ties and adhesive cable tie holders for fastening the PPU/AIU wiring
1 x green earth lead + nut and washers to earth the door to the expansion bay
4 x 1¼” PK screws and plastic spacers for mounting the PPU on the spacer bracket
Both types of brigade doors mount in the 4 unit space at the bottom of the 4100U-S1
cabinet, using 4 x M6 screws, washers and cage nuts. Cage nuts should already be fitted
to the 4100U-S1 and screws supplied with it, but there are spare screws, washers and cage
nuts supplied with each kit in case the others have been lost.
Brigade Interfaces
Overview
Format
Applications
Kit Contents
Door Mounting