General Information

• Part Number: 57400 (0-57400, 57400-A/57400-B)

• Manufacturer: Reliance Electric (Rockwell Automation)

• Series: AutoMax PLC / Distributed Control System (DCS)

• Product Type: 16‑Point 115 V AC/DC Digital Input Module

• Application: Industrial automation, drive control, on‑off signal acquisition (sensors, switches, relays)

• Status: Obsolete; new surplus / refurbished available

• Mounting: AutoMax rack‑mount, plug‑in backplane

Electrical Specifications

• Input Voltage: 115 V AC/DC (nominal)

• Max Input Voltage: 132 V RMS

• Channel Count: 16 isolated input points

• Backplane Power: +5 VDC, ±12 VDC (from rack)

• Power Dissipation: 46 W (max)

• Isolation: Opto‑isolated per channel (field ↔ logic)

• Input Impedance: ≥10 kΩ

• Response Time: ≤10 ms (typical)

• Status Indicators: LED per channel (ON/OFF)

Mechanical Characteristics

• Form Factor: Standard AutoMax plug‑in module

• Dimensions (W×D×H): 31.8 × 187.3 × 38.1 mm (1.25 × 7.375 × 1.5 in)

• Weight: ~0.8 kg (1.8 lbs)

• Connection: Rear gold‑finger edge connector (backplane); front terminal block

• Coating: Conformal coated (moisture/dust resistance)

Environmental Ratings

• Operating Temp: 0°C to +60°C

• Storage Temp: -20°C to +70°C

• Humidity: 10%–90% RH, non‑condensing

• Altitude: Up to 3,000 m (10,000 ft)

• Certifications: UL, CSA (original standards)

Key Features

1. 16‑Channel Isolated Input: 115 V AC/DC, opto‑isolated for noise immunity

2. Wide Voltage Range: Accepts 115 V AC/DC, compatible with global industrial signals

3. High Reliability: Conformal coating, LED diagnostics, hot‑swap capable

4. AutoMax Compatibility: Seamless integration with AutoMax racks & drives

5. Fast Response: ≤10 ms for real‑time control

Compatibility

• Rack Compatibility: All AutoMax series racks & backplanes

• Drive Compatibility: FlexPak, CardPak, PMI DC/AC drives

• Direct Replacement: 57400‑A/‑B fully interchangeable with 0‑57400