Model Definition

• 0-57C404-1E: Full part number

  • Leading 0: Factory‑original, unmodified

  • 57C404: Base model (4‑channel analog input)

  • ‑1: 16‑bit high resolution

  • E: Extended temperature (‑20°C to +70°C) + conformal coating

• 57C404: Core model (standard 12‑bit analog input)

• Series: AutoMax 57C Series (Reliance PLC I/O) / DCS 5000 Series

Technical Specifications

General

• Brand: RELIANCE (Reliance Electric / Baldor Reliance)

• Type: 4‑Channel High‑Speed Analog Input Module

• Form Factor: 1‑slot AutoMax rack‑mount

• Dimensions: 11.75 in (H) × 3.5 in (W) × 1.2 in (D) approx

• Weight: ~1.0 kg (2.2 lbs)

• Operating Temperature: ‑20°C to +70°C (‑1E extended range)

• Storage Temperature: ‑40°C to +85°C

• Humidity: 5%–95% non‑condensing

• Isolation: 1500 Vrms channel‑to‑backplane, channel‑to‑channel isolation

• Certifications: CE, RoHS, UL listed

• Resolution: 16‑bit (‑1E); standard 57C404 = 12‑bit

Analog Input Ratings

• Total Channels: 4 (isolated, differential)

• Signal Type: Voltage or Current (selectable per channel)

• Voltage Ranges: ±10 VDC, ±5 VDC, 0–10 VDC, 0–5 VDC

• Current Ranges: 4–20 mA, 0–20 mA (external 250Ω shunt)

• Sampling Rate: 100 kHz total (25 kHz per channel max)

• Accuracy: ±0.02% FS (25°C); ±0.05% FS (‑20°C to +70°C)

• Input Impedance: >1 MΩ (voltage); 250Ω (current)

• Protection: Overvoltage, overcurrent, ESD, transient suppression

Electrical

• Backplane Power: 5 VDC ±5% (from AutoMax rack)

• Current Draw: 0.9 A (typical), 1.3 A (max)

• Fuse: 1 A onboard fuse (per channel bank)

Interface & Communication Configuration

Physical Interfaces

• Front Panel: 4 channel terminals (CH1–CH4) + common; LED per channel (green = active, red = fault)

• Backplane: AutoMax proprietary edge connector (power + Multibus communication)

• LED Indicators:

  • PWR: Backplane power (green = OK)

  • RUN: Module active (steady = run, flash = init)

  • FLT: Fault (red = overrange/short)

  • CH1–CH4: Channel status (green = sampling, red = fault)

Communication

• Bus Protocol: AutoMax Multibus (parallel, high‑speed)

• Data Rate: 2 Mbps (backplane)

• Compatibility: AutoMax 57C series racks (57C331/332/334 chassis)

• Data Format: 16‑bit signed/unsigned analog values, parity‑checked

Core Functions

1. 4‑Channel Isolated Analog Input: Precision acquisition of voltage/current signals.

2. 16‑Bit High Resolution (‑1E): Superior accuracy for critical process/motion parameters.

3. High‑Speed Sampling: Up to 100 kHz total for dynamic signal monitoring.

4. Multi‑Range Support: Software‑selectable voltage/current ranges per channel.

5. 1500 Vrms Isolation: Protects PLC from field‑side noise, spikes, and ground loops.

6. Conformal Coating + Extended Temp (‑1E): Reliable in humid, dusty, cold/hot environments.

7. Fault Detection: Overrange, short‑circuit, and open‑loop detection with FLT alarm.

Application Scenarios

• Legacy AutoMax Retrofits: Direct replacement for 57C404 / 0‑57C404‑1E in DCS 5000 systems.

• Motion Control: Precision feedback from encoders, tachometers, and load cells.

• Process Control: Temperature, pressure, flow, and level monitoring in oil/gas, power, water treatment.

• Machine Tool: Spindle speed, vibration, and cutting force monitoring.

• Harsh Environments: Outdoor, cold‑storage, high‑humidity, or vibration‑intensive sites.

Usage & Maintenance Instructions

Installation

1. Power Off: De‑energize the AutoMax rack before insertion.

2. Insert Module: Align with slot, push firmly until backplane connector seats.

3. Secure: Tighten captive screws (torque 0.8–1.0 N·m).

4. Wiring: Connect sensors to front‑panel terminals; use shielded cable for noise immunity; select voltage/current via software.

Operation

• Power‑On: PWR ON; RUN flashes (~5 s) during self‑test.

• Normal: RUN steady; channel LEDs green during sampling.

• Fault: FLT red → check wiring, sensor, or range selection; replace fuse if needed.

Maintenance

• Preventive (Quarterly): Check terminal tightness, LED status, and connector cleanliness.

• Fuse Replacement: Power off rack; replace 1 A fuse if PWR is off or FLT persists.

• Cleaning: Low‑pressure air (≤2 bar) to remove dust; avoid liquid cleaners.

• Coating Check (‑1E): Inspect annually for cracks/peeling in high‑humidity areas.