Allen-Bradley 1746-HSTP1 SLC 500 Stepper Controller Module

June 25, 2026 • 2 min read • wayne • Science

Product Summary

The 1746-HSTP1 is a single-axis stepper controller for the SLC 500 platform. It delivers a pulse train up to 250 kHz for micro-stepping applications. This module uses differential encoder feedback to verify axis movement accurately. It supports absolute positioning counts over 8,000,000.

Theme: Expert Technical Evaluation & Performance Review

High-Speed Pulse Train Output

The 1746-HSTP1 generates a speed range from 1 to 250,000 pulses per second. This capability supports high-resolution micro-stepping drives. It allows precise control over stepper motor velocity. The module uses a trapezoidal velocity profile for smooth acceleration. Acceleration rates range from 1 to 2000 pulses per second.

Differential Encoder Feedback System

This module provides differential feedback for +5 or +15 V encoders. It does not implement closed-loop control for the axis. Instead, the encoder feedback verifies that movement matches the program. The input frequency reaches 250 kilohertz for fast data capture. This ensures accurate position verification for critical applications.

Environmental and Electrical Tolerances

The 1746-HSTP1 operates reliably in demanding industrial environments. It functions within an air temperature range of 0 to 60 degrees Celsius. The module tolerates storage temperatures from -40 to 85 degrees Celsius. It operates at altitudes up to 200 meters without performance loss. Relative humidity between 5 and 95 percent non-condensing is acceptable.

Backplane Power and Thermal Management

The module draws 200 milliamps from the 5-volt backplane supply. It also requires 90 milliamps from the 24-volt backplane supply. Thermal dissipation remains steady at 1.5 Watts for all conditions. This low power consumption reduces heat buildup in the chassis. It ensures stable operation within the SLC 500 system.

Compatibility and Integration

The 1746-HSTP1 integrates with SLC 5/01, 5/02, 5/03, 5/04, and 5/05 processors. It also works with fixed style hardware using a 2-slot expansion rack. Users can connect it to larger PLC systems via the 1746-ASB module. This broad compatibility makes it a flexible choice for system upgrades. It interfaces directly with differential input translators and opto-couplers.

Diagnostic and Configuration Features

This module uses programmable modes instead of physical DIP switches. This reduces setup time and prevents configuration errors. It includes loopback diagnostics to verify signal integrity. The step response is 100 milliseconds for input and 2.5 milliseconds for output. These features support rapid troubleshooting and system validation.