Siemens PSC-12 — main power supply and battery charger module, catalogue number 500-033340.
The PSC-12 supplies a Desigo Fire Safety Modular panel with primary regulated 24 VDC and carries the system battery charger. It is addressable and microprocessor-controlled: the operator interface can query it for charging current, terminal loading and ground faults, and a transfer circuit switches to standby batteries when AC power is lost.
- 12 amps at 24 VDC in alarm, 5 amps standby
- Built-in charger for lead-acid batteries up to 100 AH
- Universal AC input 120 to 240 VAC, 50/60 Hz
- Two outputs, 4 A power limited and 12 A non-power limited, total not over 12 A
- Four Form C relays rated 2 A: common alarm, common trouble and two programmable
- UL 864 and CAN/ULC-S576 certified, file S24304 Vol. 3; 32°F to 120°F
The PTB power termination board, 500-033390, is required for operation and mounts in the CAB enclosure. The PSX-12 is the matching extender, adding 12 A without a charger. The PSC-12M is a separate line with its own data sheet, and it uses a different termination assembly, the PSFA, not the PTB.
