Allen‑Bradley 1756-HSC – High-Speed Counter Module

Specifications

• Counter Channels: 4 independent high-speed counter channels
• Max Input Frequency: 2 MHz per channel
• Supported Signal Types: Single-phase, quadrature (A/B/Z index), pulse & direction
• Input Voltage: 24 VDC sink/source compatible encoder signals
• Count Range: 32-bit signed integer (-2,147,483,648 ~ +2,147,483,647)
• Built-in Outputs: 4 high-speed latch/compare outputs for position trigger
• Backplane Current Draw: 750 mA @ 5.1 VDC
• Power Dissipation: 3.8 W
• Connection: 1756-TBCH dedicated screw terminal base
• Status Indicators: Channel count status, OK, fault LEDs
• Operating Temperature: 0 °C to +60 °C
• Humidity: 5%–95% RH, non-condensing
• Mounting: Single slot on ControlLogix chassis
• Dimensions: 145 × 35 × 120 mm
• Weight: ~0.26 kg
• Certifications: UL/cULus, CE

Key Features

• Four independent high-speed counters for incremental encoder and pulse signal acquisition
• Supports quadrature 1x/2x/4x multiplication for high-resolution position tracking
• Hardware latch & compare outputs enable fast position-triggered motion without PLC scan delay
• High 2 MHz frequency capacity for high-speed spindles, web lines and high-speed conveyors
• Short hardware response time eliminates lag compared to regular digital input modules
• Hot-swappable module for online maintenance
• Direct position, speed and acceleration calculation via controller logic
• Compatible with all standard 24 VDC incremental rotary encoders

Applications

• Rotary encoder position tracking for cutting, printing, winding machinery
• High-speed spindle speed monitoring, conveyor line length measurement
• Position-based trigger control for packaging, filling and material processing
• Web tension control, flying cut and registration mark detection systems