RELIANCE DSA-MTR12A2

Description

Material Composition

• Outer casing: Black ABS flame-retardant industrial plastic housing with metal shielding lining
• Signal processing PCB: Low-signal-loss FR4 printed circuit board
• Differential signal isolation components: High-speed pulse transformers
• Terminal connectors: Gold-plated phosphor bronze multi-pin plug terminals
• Status indicator: High-brightness anti-vibration industrial LED lamps
• Mounting hardware: Stainless steel DIN rail spring locking clip

Structural Features

1. Standard EN 60715 35 mm DIN rail snap-on integrated unit design
2. Front panel independent LED indicators for power supply, module running state and per-channel feedback signal fault
3. 12 groups of separate encoder input terminal pairs, each channel with independent galvanic isolation circuit
4. Built-in signal shaping and amplitude compensation circuit for long-distance encoder cable transmission
5. Internal metal shielding lining blocks external electromagnetic interference to weak pulse feedback signals
6. Rear spring clip locking mechanism enables rapid tool-free installation and removal from DIN rail

Technical Specifications

• Model Identifier: DSA-MTR12A2
• Supported Encoder Signal Types: RS422 differential incremental encoder, SSI absolute encoder, 5 V line driver pulse signals
• Maximum Supported Pulse Frequency Per Channel: 2 MHz input pulse signal bandwidth
• Total Feedback Channel Capacity: 12 independent isolated encoder input channels
• Channel-to-Backplane Signal Isolation Voltage: 1500 VAC pulse transformer isolation
• Module Operating Power Supply: 24 VDC industrial control power, input tolerance ±10%
• Maximum Power Consumption: 4.5 W under full 12-channel load
• Operating Temperature Range: -10 ℃ ~ +60 ℃
• Storage Temperature Range: -30 ℃ ~ +75 ℃
• Ambient Humidity Tolerance: 5% ~ 95% RH, non-condensing
• Vibration Compliance Standard: IEC 60068-2-6, 10–150 Hz, 1 g continuous vibration resistance
• Unit Dimension: 145 mm (L) × 92 mm (W) × 40 mm (D)
• Net Weight: 0.42 kg
• Drive Compatibility: Reliance GV3000 servo drive, SP500 variable frequency drive, AutoMax motion controller rack

Function Features

1. 12 fully independent isolated encoder input channels, supports centralized feedback collection for up to 12 servo motion axes simultaneously
2. High-speed signal shaping circuit compensates pulse amplitude attenuation for encoder cables up to 100 meters in length
3. Real-time per-channel fault diagnosis: encoder cable open circuit, short circuit, pulse signal loss, power loss to encoder
4. Differential RS422 signal galvanic isolation eliminates ground loop noise distortion of weak position feedback pulses
5. Standardized feedback data bus interface transmits processed position data to Reliance AutoMax motion control rack backplane
6. Front panel channel fault LED provides direct visual indication for rapid maintenance troubleshooting
7. Automatic signal amplitude matching compatible with 5 V industry standard servo motor encoder line drivers
8. No external signal repeaters required for medium-distance servo equipment layout, reducing wiring component quantity
9. Hot-plug compatible with AutoMax control rack backplane without shutting down entire multi-axis motion system
10. Internal signal filtering suppresses high-frequency electromagnetic interference from nearby inverter and welding equipment

Working Principle

24 VDC control power energizes internal signal conditioning and isolation circuits. Encoder pulse signals transmitted from each servo motor enter independent channel pulse transformers for galvanic isolation, eliminating common-mode ground noise. High-speed shaping circuits restore distorted pulse waveforms generated by long cable resistance and capacitance attenuation, converting weak input pulses into stable square-wave differential signals. A dedicated multi-channel data framing chip packages 12 groups of position pulse data into parallel bus frames and transmits to the Reliance AutoMax motion controller backplane. Signal sampling circuits continuously monitor pulse amplitude and signal presence for each channel; abnormal signal states trigger corresponding front-panel fault LED activation and fault code transmission to the upper motion controller. Built-in metal shielding lining absorbs external high-frequency interference to guarantee position feedback precision for high-speed servo positioning applications.

Advantage Highlights

1. 12-channel integrated centralized feedback processing reduces quantity of single-channel encoder adapters, optimizing cabinet layout
2. Wide 2 MHz pulse bandwidth supports high-speed high-resolution servo encoders for precision machining equipment
3. 1500 VAC channel isolation effectively eliminates ground loop signal distortion in multi-motor shared ground industrial systems
4. Built-in long-cable signal amplitude compensation removes requirement for external signal repeaters
5. Full compatibility with all Reliance classic servo drive and AutoMax motion control hardware platforms
6. DIN rail tool-free snap mounting greatly shortens equipment assembly and maintenance time
7. Continuous channel fault monitoring enables predictive maintenance of servo encoder wiring faults before positioning failure occurs

Applicable Industries

CNC precision machining centers, automated packaging multi-axis servo lines, textile spinning servo control systems, metal stamping automated transfer equipment, automotive robotic welding lines, printing press multi-axis register control, material handling automated gantry robots

Installation Requirements

1. Snap unit onto EN 60715 standard 35 mm DIN rail inside IP54 minimum protection electrical cabinet
2. Separate encoder signal wiring cable routing from high-power inverter and motor power cables with minimum 20 cm clearance
3. Encoder wiring must use shielded differential twisted-pair dedicated encoder cable, shield single-point grounded at DSA-MTR12A2 terminal side only
4. 24 VDC power supply wiring uses 0.75 mm² copper cable, terminal screw torque fixed at 0.5 N·m
5. Maintain minimum 15 mm ventilation gap between adjacent DIN rail modules to avoid heat accumulation
6. Cabinet internal dew point must be controlled below operating ambient temperature to prevent condensed water on PCB surface

Usage Precautions

1. Do not run encoder signal cables parallel with AC motor power cables for distances exceeding 5 meters; strong electromagnetic interference distorts position pulses
2. Replace damaged encoder cables immediately upon channel fault LED activation; long-term distorted feedback causes servo positioning deviation
3. Avoid installing unit adjacent to resistance welding machines and high-power medium-frequency inverters
4. Disconnect 24 VDC control power supply before plugging/unplugging encoder terminal connectors to prevent electrostatic chip damage
5. Calibrate encoder pulse count mapping parameters in AutoMax software after any encoder cable replacement
6. Do not modify internal circuit wiring of the module housing; disassembly voids factory motion control certification