Class A Wiring; Class B Wiring - Simplex 4100ES Installation Manual

13.5.1 Wiring Configurations
RUI cabling can be accomplished either through Class A or Class B wiring.
Class A wiring allows transponder cabinets to communicate with the FACU even in the event of an open circuit somewhere in the loop.
Class A wiring requires that two wires are routed from the CPU motherboard to each RIC, and then back again to the CPU motherboard.
Class B wiring allows "T" tapping, and therefore requires less wiring distance per installation than Class A. Additionally, Class B wiring does
not require end-of-line resistors, because each RIC communicates directly to the CPU.
Important: Make sure these prerequisites are accounted for before wiring:
• All transponder cabinets are installed within 2500 feet (762 m) of the FACU.
• Conductors test free of all grounds.
• All wires are between 12 and 18 AWG, or as the local code dictates.
13.5.2

Class A Wiring

To connect the RUI card to RICs using Class A wiring, read the following instructions and refer to Figure 84, on the next page.
1. Route wire between 12 and 18 AWG from the + (TB1-8) and - (TB1-6) terminals on the COMMS "A" block of the 562-856/565-217
RUI card to the TB1-8 (+) and TB1-6 (-) terminals on the 565-233 RIC.
2. Route wire from the first RIC to the next one. Repeat for each transponder cabinet within 2500 feet (762 m).
3. Route wire from TB1-7 (+) and TB1-5 (-) on the last RIC to + (TB1-4) and - (TB1-2) on the COMMS "B" block of the 562-856/565-217
RUI card.
13.5.3

Class B Wiring

To connect the RUI card to RIC II cards using Class B wiring, read the following instructions and refer to Figure 84, on the next page.
1. Route wire between 12 and 18 AWG from the + (TB1-8) and - (TB1-6) terminals on the COMMS "A" block of the 562-856/565-217
RUI card to the TB1-8 (+) and TB1-6 (-) terminals on the 565-233 RIC.
2. Route wire from the first RIC to the next one. Repeat for each transponder cabinet within 2500 feet (762 m).
page 121
4100ES Fire Alarm System Installation Guide
574-848 Rev. BQ