RELIANCE ELECTRIC 57C493

Technical Specifications:

• AC Input: 100‑132 V AC, single‑phase, 50/60 Hz
• Total Output Power: 376 W
• DC Output: +5 V DC for logic circuit, +24 V DC for field I/O auxiliary power
• Hold‑over Time: 20 ms when AC power fails; power‑fail interrupt signal output 3 ms before DC voltage drop‑off
• Isolation Rating: 1500 V AC input isolation, 600 V DC output‑to‑rack isolation
• Operating Temperature: 0 °C ~ 60 °C
• Storage Temperature: ‑40 °C ~ 85 °C
• Slot Occupation: Occupies 3 slots of AutoMax rack
• Functional Features:
• Soft‑start circuit, output voltage rises gradually after power‑on, generates rack initialization signal after voltage stabilization
• Built‑in over‑voltage protection, over‑current short‑circuit protection
• Multiple LED status indicators: POWER ON, P/S READY
• Equipped with keyswitch, removable terminal block, captive ejectors and hold‑down screws for convenient maintenance and replacement
• Power‑fail interrupt function for orderly safe shutdown of control system upon mains power loss
• Working Principle: Input AC power passes through built‑in line filter, and is converted into regulated multiple‑channel DC power by switching power supply circuit, which is transmitted to each module through Multibus backplane; when AC input disappears, internal circuit maintains short‑time DC output and sends power‑failure warning signal to processor module.
• Material Composition: Aluminum alloy heat‑dissipating housing, high‑power switching power supply circuit board, power‑filtering capacitor group, metal front panel with keyswitch, insulated terminal assembly.
• Structural Characteristics: 3‑slot large‑size rack‑plug‑in module; front‑panel has key lock, LED indicator and detachable wiring terminal; built‑in large‑area aluminum heat sink for heat dissipation.
• Application Scenarios: Heavy‑duty AutoMax PLC control racks, process industry control cabinets, material handling automation equipment, high‑reliability continuous production line control systems.
• Installation Requirements: Must be installed at the leftmost slot of AutoMax Multibus rack; tighten AC input terminal screws reliably; control cabinet needs good ventilation to ensure heat dissipation of power supply; ground wire must be connected according to specification.