SBUS Wiring
Control Panel Installation
FCP-300/FCP-300ECS Manual —
P/N LS10145-002FK-E:A 3/12/2021
27
.
Figure 4.6 Battery Connections in the RBB Cabinet
4.
Connect battery leads to the backup battery terminals. See Figure 4.6. Observe the proper polarity to prevent any damage
to the batteries or the control panel.
5.
Insert the RBB cover screws into the cover mounting holes (see Figure 4.6). Screw the cover screw 3/4 of the way into the
cover mounting hole.
6.
Align the cover plate mounting keyhole over the cover mounting screws. See Figure 4.7.
Figure 4.7 Cover Plate Mounting Keyholes and Cover Mounting Screws Alignment
7.
Slide the cover into place and tighten the cover mounting screws. See Figure 4.7.
4.4 SBUS Wiring
This Section contains information on how to calculate the SBUS wire distances and the types of wiring configurations (Class
A and Class B).
4.4.1 Calculating Wiring Distance for SBUS Modules
The FCP-300/ECS panel has two SBUS circuits which can support up to 1.0A of module load per SBUS circuit. When deter-
mining the type of wire and the maximum wiring distance that can be used, you will need to calculate the loads for each SBUS
to ensure that each SBUS does not exceed 1.0A.
To calculate the wire gauge that must be used to connect SBUS modules to the control panel, it is necessary to calculate the
total worst case current draw for all modules on a single 4-conductor bus. The total worst case current draw is calculated by
adding the individual worst case currents for each module. The individual worst case values are shown in the table below.
Conduit
Conduit
Coupler
+
+
-
-
RBB Cabinet
Cover Screws
RBB Cabinet
Cover Screws
NOTE:
Figure 4.6 is an example of how the wire connections can be routed. However, any other cabinet knock-outs (on either the main
control panel or the RBB cabinet), that are not previously being used may be utilized to connect conduit between the two cabinets.
Cover Plate
Mounting Keyholes
NOTE:
The Total worst case current draw on a single SBUS cannot exceed 1 amp. If a large number of accessory modules are required,
and the worst case current draw will exceed the 1 amp limit, then the current draw must be distributed using the FIK-RPS1000 Power
Expanders. Each FIK-RPS1000 Power Expander provides an additional SBUS, with an additional 1 amp of SBUS current. The wiring
distance calculations are done separately for each FIK-RPS1000, and separately for the control panel itself.
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