Product Overview
The Allen-Bradley 1746-HSCE is a High-Speed Counter module designed for the SLC 500 Programmable Logic Controller (PLC) platform. Manufactured by Rockwell Automation, this module handles bidirectional counting, motion detection, and totalizing applications that require fast processing of discrete inputs. It is commonly used in factory automation and process control environments.
Technical Specifications Breakdown
Key parameters for the 1746-HSCE are listed below for quick reference:
| Feature | Specification |
|---|---|
| Module Type | High-Speed Counter module |
| Series | SLC 500 |
| Part Number | 1746-HSCE |
| Brand | Allen-Bradley |
| Backplane Current | 320 mA at +5V; 0 mA at +24V |
| Maximum Cable Length | 305 m (1000 ft) |
| Recommended Cable | Belden 9503 or equivalent |
| Number of Channels | One (1) counting channel |
| Input Voltage | ±5V dc (Differential); 0-5VDC (Single-ended) |
| Min. Pulse Width | 10 µs |
| Min. Pulse Separation | 4.5 µs |
| Max. Input Frequency | Sequencer and Range: 50k Hz Rate: 32.767k Hz |
| Number of Outputs | Four (4) open-collector outputs |
| On-State Output Current | 16 mA at 4.5V dc 40 mA at 10V dc; 40 mA at 10V dc 125 mA at 30V dc |
| Operating Temperature | 0°C to +60°C (+32°F to +140°F) |
| Storage Temperature | -40°C to +85°C (-40°F to +185°F) |
| Relative Humidity | 5 to 95% (without condensation) |
| Inputs | 1 Count Input |
| Outputs | 4 |
| Input Frequency Range | 50 kilohertz |
| Backplane Current (5 Volts) | 32 milliamps |
| I/O Connection | 1746-RT25G |
| Update Time | 4.8 milliseconds |
| Slots | 1 |
| Step Response | 100 milliseconds in, 2.5 milliseconds out |
| Isolation Voltage | 1500 Volts |
Industry Applications
This module excels in applications requiring precise high-speed counting. In packaging lines, it tracks product flow using encoder inputs A, B, and Z at up to 50 kHz. In material handling, it monitors conveyor speed and position. The bidirectional counting capability supports motion detection and totalizing tasks common in both factory and process automation.
Installation & Setup Guidance
Install the 1746-HSCE into any available slot of an SLC 500 chassis. Use Belden 9503 or equivalent cable for encoder connections, keeping cable runs within 305 m (1000 ft). Configure the module for Range, Rate, or Sequencer mode via the SLC 500 programming software. Ensure the input voltage matches your encoder: ±5V dc differential or 0-5VDC single-ended.
Maintenance & Reliability
Operate the module within 0°C to +60°C and 5 to 95% relative humidity (non-condensing). Store it between -40°C and +85°C. Periodically inspect the I/O connection (1746-RT25G) for secure fit. The module is intended for use in a NEMA-rated enclosure to protect against industrial contaminants.
Compatibility & Integration
The 1746-HSCE integrates seamlessly with the SLC 500 platform. It can be installed locally with the CPU or remotely via a communication adapter. The module occupies one slot and draws 320 mA at +5V from the backplane.
Selection Guide & Purchasing Advice
When selecting a high-speed counter module, verify your application's frequency requirements. The 1746-HSCE supports up to 50 kHz in Sequencer mode and 32.767 kHz in Rate mode. For reliable supply, order from SpareTechPLC, your trusted source for industrial automation parts. Please verify current lifecycle status and availability with SpareTechPLC before ordering.
Troubleshooting & Common Issues
If the module does not count correctly, check the input wiring and cable length. Ensure the encoder provides the correct voltage level (±5V dc differential or 0-5VDC single-ended). Verify the configured mode matches the input frequency. Use the built-in diagnostic LEDs and status word in the input data file for fault identification.
