Product Introduction

Model Interpretation

• 57402D: Base model number; D denotes hardware revision D.

• 0‑57402‑D: Full AutoMax part number (leading 0 = standard I/O module).

• 57402: Product family = low‑power 115 V AC/DC output module.

• ‑D: Hardware revision with updated PCB layout, components, and ECO upgrades; fully backward compatible with earlier revisions (‑1/‑2/‑C).

Technical Parameters

• Channels: 16 independent output channels (0–15).

• Output Type: Solid‑state, supports 115 VAC or 24–115 VDC loads.

• Load Voltage: 70–132 VAC; 24–132 VDC.

• Rated Current: 0.2 A per channel; maximum total current 3.2 A.

• Leakage Current: ≤1 mA (off‑state).

• On‑State Resistance: <20 Ω.

• Response Time: <15 ms.

• Backplane Power: +5 VDC, ~400 mA.

• Isolation: 2500 VAC between field side and logic common; 1500 VAC channel‑to‑channel.

• Protection: Overcurrent, reverse polarity, and thermal shutdown; self‑recovery after fault.

• Operating Temperature: 0 °C to +60 °C.

• Humidity: 5%–95% non‑condensing.

• Weight: ~0.95 kg.

Interface and Communication Configuration

• Backplane Interface: Edge connector for AutoMax dedicated backplane bus; provides power and data exchange with the CPU.

• Field Interface: Screw terminals (0–15) for load connection; four common groups (C1–C4) for isolated return paths.

• Indicators: 16 channel status LEDs (one per channel) plus power/fault LED on the front panel.

• Communication: No independent network ports; all I/O data exchanged via the AutoMax backplane bus.

Core Functions

• Converts 5 V logic signals from the PLC into 115 V AC/DC drive signals for low‑power field devices.

• Drives solenoid valves, small relays, contactors, indicator lamps, and low‑current motor starters.

• Provides individual channel overcurrent and reverse polarity protection with automatic recovery.

• Feeds back channel status to the CPU for diagnostics and system monitoring.

• Supports hot swapping in properly configured AutoMax systems.

Application Scenarios

• Replacement and maintenance of legacy AutoMax PLC/DCS systems in industrial plants.

• Process control in paper, steel, chemical, and packaging industries.

• Driving low‑power 115 V field devices in assembly lines, material handling, and machine tools.

• Suitable for safety‑related circuits requiring low‑current outputs and high isolation.

Operation and Maintenance Instructions

• Installation: Power off the rack before insertion; align and push the module firmly into the slot, then tighten the mounting screws.

• Wiring: Connect load wires to terminals 0–15 and common returns to C1–C4; avoid over‑torquing terminals.

• ESD Protection: Use anti‑static wristbands and mats when handling the module; static discharge may damage internal circuits.

• Routine Maintenance: Inspect terminals quarterly for looseness or corrosion; keep the module clean and free of dust.

• Troubleshooting: Check channel LEDs for fault indication; verify load voltage and wiring before replacing the module.

• Replacement: If internal failure occurs, replace the entire module; do not attempt to repair the PCB.