Simplex 4100-0634 — Power Distribution Module (PDM), 120 V, for 4100U and 4100ES fire alarm control panels.
The PDM is where the dedicated AC branch circuit and the standby battery land inside the back box. AC and battery power are then distributed by harness to the power modules in each bay — the EPS, SPS, RPS or XPS — which feed the CPU and card bays. One PDM is used per back box, and it lives in the non-power-limited right side of the cabinet on a slide bracket or a box mount.
- 120 V module; Simplex assembly number 742-396
- Terminals on top for AC In, Neutral and battery, under a cover
- Standby battery connects through harness 734-015 or 734-072
- Bay feeds use harness 734-012, power supply to PDM AC and battery
- AC draw served: 4.6 A per EPS; 4 A per SPS, XPS, RPS or TPS
- Replacement instructions 574-923; rack installs add kit 4100-2144
Order by voltage: 4100-0635 is the same module for 220/230/240 V. The Power Distribution Interface (PDI) is a different assembly that links bays.
