The Allen-Bradley 1746-HSCE/A, also cataloged as the 1746-HSCE High Speed Counter Module, operates as a dedicated hardware component for high-frequency pulse counting and encoder signal processing within SLC 500 controller platforms. The module provides high-speed input acquisition and output control functions for motion-related counting tasks.

Model Identification

The 1746-HSCE/A is a high-speed counter module designed for Allen-Bradley SLC 500 systems. The HSCE designation identifies the module as a high-speed counter and encoder interface unit. It supports multi-channel counting functions with dedicated input and output connections.

Hardware Specifications

High Speed Counting and Encoder Processing

The 1746-HSCE performs direct processing of high-frequency pulse signals from encoder devices and external counting sources. The module reduces dependence on standard PLC scan cycle processing by handling counting operations through dedicated hardware logic.

The module supports I/O density scaling within SLC 500 architectures by combining counter input processing and output control functions in a single chassis module. Proper signal wiring and encoder configuration are required to maintain accurate pulse detection.

Ordering Information

The delivered package contains:

• 1 x Allen-Bradley 1746-HSCE High Speed Counter Module
• 1 x Factory product identification label
• 1 x Protective electronic component packaging

Additional system components may include:

• SLC 500 processor unit
• Compatible SLC chassis and power supply
• Encoder interface wiring accessories
• Field terminal connection components

Field Installation Guidelines

Module Mounting

• Install the module into a compatible Allen-Bradley SLC 500 chassis slot.
• Remove chassis power before installing or removing the module.
• Confirm the slot position matches the controller project configuration.

Encoder Signal Wiring

• Use appropriate signal cables for high-speed pulse transmission.
• Separate encoder wiring from high-voltage power cables to reduce electrical interference.
• Verify signal polarity and terminal assignments before commissioning.
• Apply proper shield grounding practices according to installation requirements.

Controller Configuration

• Configure the high-speed counter module parameters within the SLC controller program.
• Verify input counting operation before connecting mechanical equipment.
• Confirm output response settings match the connected field devices.

Frequently Asked Questions

• What is the primary function of the 1746-HSCE module?

The 1746-HSCE is designed to process high-speed pulse inputs from encoders and counting devices within an SLC 500 control system.

• How many input and output points are available on this module?

The module provides 4 high-speed inputs and 4 outputs for counter-related signal processing and control functions.

• Does the 1746-HSCE depend on PLC scan time for counting?

The module uses dedicated hardware counting functions, reducing dependence on normal processor scan cycle timing.

• Can the module be installed in any SLC 500 chassis?

The module requires installation in a compatible SLC 500 chassis with correct power and slot configuration.

• What type of field devices can connect to this module?

The module can interface with compatible encoder devices and pulse-generating field equipment requiring high-speed counting.

• What power supply requirement should be considered?

The module draws approximately 320 mA from the SLC 500 system power supply and must be included in chassis load calculations.

• Is special wiring required for encoder signals?

High-speed signal wiring should use suitable cable routing methods with proper shielding and separation from noise sources.

• Does the 1746-HSCE support analog signal measurement?

No. The module processes digital pulse signals and encoder inputs rather than continuous analog measurements.