Simplex 733-882 — the 8-wire cable that ties a 4005 expansion power supply back to the 4005 main power supply.
The 4005 Expansion Power Supply (model 4005-9813, board assembly 565-481) mounts in the left side of the 4005 back box and adds up to 5 A of regulated alarm power. Simplex is explicit that it is not a standalone supply: its 8-position P1 header must be landed on P2 of the main 4005 supply, board assembly 565-479. That single link commons the two supplies, carries battery distribution between them, and feeds the expansion supply supervision signal to the main supply so a fault is reported. AC is a separate run.
- Simplex 4005 fire alarm control panel; expansion power supply interconnect
- 8-wire cable, P1 (expansion supply) to P2 (main supply)
- P1 is an 8-position connector
- Documented in Simplex installation instructions 574-072 Rev. B
Check the panel family before ordering. The 4010 expansion supplies use a different set of harnesses entirely — 733-950 and 733-951 from the expansion supply to the SFI/O board, and 733-945 for the batteries — and none of them interchange with 733-882.
