June 08, 2026

S-67118A Reliance Electric Isolated Analog Output Module

The S-67118A (also designated as 57C410) is a 4-channel isolated analog output module manufactured by Reliance Electric (later ABB/Baldor), serving as a revised and backward-compatible version of the original S-67118. Designed for the AutoMax PLC and DCS 5000 series, it delivers high-precision, noise-immune analog signals for industrial process and motion control applications.

Description

S-67118A Reliance Electric Isolated Analog Output Module

Overview

The S-67118A converts digital control signals from the AutoMax backplane into standard voltage or current outputs, with each channel providing 2500 V galvanic isolation between logic and field circuits, as well as between individual channels. This isolation suppresses ground loops, electrical noise, and voltage transients in harsh industrial environments. The module integrates 12-bit D/A converters for accurate signal conversion, supporting driving of valves, VFDs, actuators, and process instruments. As an upgraded revision of the S-67118, it maintains full functional compatibility while incorporating minor hardware enhancements for improved reliability and thermal performance.

Key Features

Four Fully Isolated Channels: 4 independent, galvanically isolated channels configurable for voltage or current output, enabling multi-device control with single-module integration.
12-Bit High Resolution: 12-bit resolution for voltage outputs and 11-bit for 4–20 mA current outputs, ensuring precise and stable signal reproduction.
2500 V Reinforced Isolation: Complete isolation between logic common and outputs, and between channels, protecting control systems from high-voltage transients and industrial noise.
Multi-Range Configuration: Supports standard industrial ranges: voltage (0–10 VDC, ±5 VDC, ±8 VDC, ±10 VDC) and current (4–20 mA, max 10 mA per channel).
Integrated 100 Hz Low-Pass Filter: First-order filter on each output smooths signal fluctuations, reducing noise and ensuring stable operation of analog field devices.
Enhanced Rugged Design: Upgraded component layout and improved heat dissipation compared to the S-67118, with IP20-rated metal enclosure for vibration and shock resistance.
Backward Compatibility: Direct plug-and-play replacement for S-67118 and S-67118B, compatible with all AutoMax Multibus I/O racks and DCS 5000 systems.
LED Diagnostic Indicators: Front-panel LEDs for power, channel activity, and fault status, simplifying on-site troubleshooting and maintenance.

Technical Specifications

Manufacturer: Reliance Electric (ABB/Baldor)
Model: S-67118A (alternate part numbers: 57C410, 57C410A)
Module Type: Isolated Analog Output Module
Series: AutoMax Multibus I/O, DCS 5000
Number of Channels: 4 (per-channel isolation)
Resolution: 12-bit (voltage), 11-bit (4–20 mA current)
Output Ranges:
- Voltage: 0–10 VDC, ±5 VDC, ±8 VDC, ±10 VDC
- Current: 4–20 mA (max 10 mA/channel)
Isolation Voltage: 2500 V (logic-to-output, channel-to-channel)
Output Filter: 100 Hz first-order low-pass filter
Accuracy: ±0.1% of full scale (at 25°C)
Power Requirements: 5 VDC @ 100 mA, 24 VDC @ 120 mA (from backplane)
Operating Temperature: -20°C to +70°C (-4°F to +158°F)
Storage Temperature: -40°C to +85°C (-40°F to +185°F)
Humidity: 5%–95% non-condensing
Dimensions (Approx.): 355 mm × 203 mm × 76 mm (14 in × 8 in × 3 in)
Weight (Approx.): 0.55 kg (2.5 lbs)
Enclosure Rating: IP20
Mounting: Rack-mount (AutoMax standard backplane)
Revision Difference: Improved PCB trace routing and component screening over S-67118, reducing long-term drift and enhancing thermal stability.

Applications

The S-67118A is widely used in industrial automation requiring precise analog control, including:

Process Control: Regulating flow, pressure, temperature, and level via analog valves and transmitters in chemical, oil and gas, water treatment, and pharmaceutical industries.
Motion Control: Driving VFDs, servo amplifiers, and motor controllers for speed and positioning in material handling, packaging, and machine tool applications.
Manufacturing Automation: Controlling actuators, solenoids, and analog indicators in assembly lines, textile machinery, and metalworking equipment.
Legacy System Maintenance: Ideal for upgrading or repairing existing AutoMax/DCS 5000 systems as a drop-in replacement for older S-67118 modules.

Compatibility and Availability

Compatible Systems: AutoMax PLC, DCS 5000 series, and all Reliance Electric Multibus-based control systems.
Alternate Part Numbers: S-67118, S-67118B, 57C410, 57C410A (functionally interchangeable).
Status: Obsolete (original production discontinued); available as refurbished, surplus, or used units from industrial automation parts suppliers.
Refurbished Units: Undergo full disassembly, component replacement, calibration, and load testing to meet factory specifications, with warranty options for reliable operation.

Advantages

Enhanced Reliability: Upgraded hardware design reduces component stress and improves long-term stability compared to the S-67118.
Superior Noise Immunity: 2500 V isolation eliminates ground loops and noise interference, suitable for electrically harsh environments.
Flexible Configuration: Multiple output ranges support diverse analog field devices, reducing inventory and system complexity.
Cost-Effective Legacy Support: Refurbished units provide a budget-friendly solution for maintaining existing AutoMax/DCS systems without full replacement.
Seamless Integration: Backward compatibility ensures easy migration from S-67118 to S-67118A with no system reconfiguration required.

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