Simplex 562-727 — legacy 4100 motherboard, catalogued as Motherboard, Auxiliary (Relay), 2 Amp (w/o Suppression), 32-Point.
In this architecture a panel module is two boards. The motherboard slides into a master controller or expansion bay, carries the J1 connector and P1 header that pass power and communications along to adjacent boards, and provides the field termination; the daughter card plugs onto it. The later 4100ES parts list shortens the entry to Motherboard, 32 points (w/o Suppression), the source of most store wording.
- Installs in 2975-91xx or 2975-94xx back box bays
- Oriented J1 right, P1 left, held by four torx screws
- Catalogued as a replacement service part, no sales feature PID
- Shown in Simplex figures carrying the 565-158 quad isolator board
Neighbouring rows differ by one digit. 562-858 is the same 2 Amp 32-point auxiliary relay board WITH suppression; 562-952 is the 10 Amp version. Separate again are Style B boards 562-856 and 562-799 and Style D boards 562-823 and 562-733. Simplex never defines what its suppression option does, so match the board being replaced.
