Product Overview
When precise stepper motor control is critical in your automation process, the Allen-Bradley 1746-HSTP1 delivers reliable performance. This SLC 500 Stepper Controller Module is a single-slot intelligent module designed to operate with a wide range of SLC 500 processors. It provides accurate positioning for applications requiring up to 250 kHz pulse train output, making it ideal for micro-stepping and high-speed motion control.
The 1746-HSTP1 integrates seamlessly with the SLC 500 platform, supporting both fixed-style hardware with a 2-slot expansion rack and modular processors including SLC 5/01, 5/02, 5/03, 5/04, and 5/05. Its differential encoder feedback ensures precise position verification, while its loopback diagnostics enhance system reliability.
Technical Specifications
The following table lists the key specifications for the Allen-Bradley 1746-HSTP1. All values are directly from the manufacturer's data.
| Specification |
Value |
| Manufacturer |
Rockwell Automation |
| Brand |
Allen-Bradley |
| Part Number |
1746-HSTP1 |
| Series |
SLC 500 |
| Module Type |
SLC Stepper Controller Module |
| No. of Axes |
1 |
| Compatible Interfaces |
Stepper Motor Driver |
| Speed Range |
1 to 250,000 pulses per second |
| Acceleration |
1 to 2000 pulses per second, trapezoidal velocity profile |
| Acceleration Step Rate |
4 milliseconds or less |
| Inputs |
Differential |
| Outputs |
Digital |
| Input Frequency |
250 kilohertz |
| Backplane Current (5 Volts) |
200 milliamps |
| Backplane Current (24 Volts) |
90 milliamps |
| I/O Connection |
1746-HT and 1746-HCA |
| Step Response |
100 ms in, 2.5 ms out |
With a speed range of 1 to 250,000 pulses per second, the 1746-HSTP1 handles both low-speed precise positioning and high-speed motion profiles. The acceleration trapezoidal profile ensures smooth velocity changes, reducing mechanical stress. The module's differential inputs reject electrical noise, making it suitable for industrial environments.
Applications
The 1746-HSTP1 excels in applications requiring precise stepper motor control. Typical uses include:
- CNC machinery where accurate axis positioning is essential.
- Packaging equipment that needs synchronized motion control.
- Material handling systems requiring repeatable positioning.
In a CNC retrofit scenario, the 1746-HSTP1 provides the pulse train output needed to drive stepper drivers, enabling smooth and accurate cutting paths. Its 250 kHz capability supports high-speed operations without losing resolution.
Installation & Setup
Installing the 1746-HSTP1 is straightforward. It fits into any SLC 500 chassis slot and connects to the backplane. Ensure the module is properly seated and the locking tab engages. For wiring, use the 1746-HT or 1746-HCA I/O connection cables to interface with the stepper driver and encoder. Verify that the encoder supply voltage matches the module's differential input requirements (+5 or +15 V DC). The module does not require DIP switch configuration; all settings are programmable via the SLC processor.
Maintenance & Reliability
The 1746-HSTP1 is built for long service life with minimal maintenance. Its solid-state design has no moving parts, reducing wear. However, periodic inspection of connections and cables is recommended to prevent loose terminations. The module operates within a temperature range of 0-60°C and can be stored at -40 to 85°C. Keep the enclosure clean and free from excessive dust to ensure proper cooling. With no DIP switches to adjust, the risk of misconfiguration is eliminated, enhancing overall reliability.
Compatibility & Integration
The Allen-Bradley 1746-HSTP1 is designed for the SLC 500 family. It works with all modular processors (SLC 5/01, 5/02, 5/03, 5/04, 5/05) and fixed-style controllers with a 2-slot expansion rack. For larger systems, the 1746-ASB remote I/O adapter allows integration into PLC-5 or ControlLogix systems. The module interfaces directly with stepper motor drivers and accepts differential encoder feedback from +5 or +15 V encoders. It also supports single-ended TTL and opto-coupler interfaces, offering flexibility in system design.
Selection Guide
Before purchasing the 1746-HSTP1, verify that your SLC 500 chassis has an available slot and that your processor firmware supports this module. Confirm the encoder type and supply voltage match the module's inputs. For new installations, consider ordering the 1746-HT and 1746-HCA cables if not already available. PLC Source PRO offers genuine Allen-Bradley 1746-HSTP1 modules with fast shipping and competitive pricing. Ensure you have the correct part number and accessories for your specific application.