Product Brief Introduction

Model Definition

• 57C: Denotes Reliance’s 57C series rack-mounted modular control platform, focused on motion and I/O modules for AutoMax systems.

• 422: Unique identifier for the 2-axis servo motion control module, distinguishing it from other 57C series modules (e.g., 57C421, a mainboard module) based on hardware and function.

• Suffixes (e.g., 57C422B/C): Indicate hardware revisions or variant configurations for specific system compatibility.

Technical Specifications

• Processor: 80186-compatible microprocessor.

• Power Supply: 5V DC from rack backplane, with additional ±12V/±15V for analog circuits.

• Axis Configuration: 2 independent servo axes.

• Encoder Interface: Differential TTL, 5V, 250 kHz maximum frequency per channel, 4.5mA max input current.

• Control Loop Update: 1.25ms for position/velocity loops; 50µs transport delay.

• Registration Input: 15–24V DC electronic signal.

• Operating Temperature: 0°C to 60°C; Storage: -20°C to 70°C.

• Humidity: 5%–95% non-condensing.

• Safety: Onboard watchdog with relay interlock for drive enable circuitry.

Interface and Communication Configuration

• Backplane Interface: Direct connection to AutoMax Multibus backplane via gold fingers, enabling high-speed data exchange with system processors (AutoMax/DCS 5000) and other modules.

• External I/O: Two 37-pin connectors for servo drives and encoders, providing differential TTL encoder signals, drive enable, and registration inputs.

• Communication Protocol: Uses proprietary Reliance backplane protocol for real-time motion commands and status data; no standalone fieldbus ports, relying on the host system for network connectivity.

Core Functions

• 2-Axis Closed-Loop Control: Executes point-to-point positioning, velocity, and acceleration control for two axes with high precision.

• Electronic Gearing/Camming: Replaces mechanical gears and cams with electronic synchronization, reducing wear and backlash.

• Encoder Feedback Processing: Reads differential TTL encoder signals for position tracking, supporting up to 250 kHz pulse frequency.

• Drive Interface Management: Outputs control signals to AC/DC servo amplifiers, operating in velocity or current loops.

• System Monitoring: Onboard watchdog monitors CPU activity; triggers interlock relay to disable drives on fault.

• Multi-Axis Synchronization: Connects with other 57C422 modules for coordinated motion across multiple axes.

Application Scenarios

• Industrial Motion Automation: Used in CNC machinery, robotics, and automated assembly lines requiring precise 2-axis control.

• Material Handling: Conveyor systems, packaging machines, and winding equipment needing synchronized axis motion.

• Retrofit Projects: Replacement for legacy Reliance 57C series motion modules in aging production lines, compatible with existing AutoMax racks.

• Metalworking: Machine tools, press brakes, and laser cutters requiring high-speed, accurate positioning.

Operation and Maintenance Instructions

• Installation: Ensure rack power is off before inserting the module. Align with chassis rails, fully seat backplane gold fingers, and secure with faceplate screws.

• Wiring: Use shielded cables for encoder and drive connections to minimize EMI; avoid routing power and signal cables together.

• Routine Maintenance: Every 3–6 months, power down the system and clean the module’s surface and rack vents with dry compressed air to remove dust.

• Fault Diagnosis: Check LED indicators (X HOME, X FAULT, etc.) for axis status; verify backplane connections if communication errors occur.

• Replacement: If persistent faults occur after reset, replace the module with a compatible revision (e.g., 57C422B/C) and update system parameters.

• Storage: Keep spare modules in a dry, temperature-controlled environment, away from corrosive gases and strong electromagnetic fields.

• Modification: Do not alter onboard circuits or components without factory authorization, as this voids warranty and may cause system instability.