Allen-Bradley 1746-HSTP1 Stepper Controller Module

Allen-Bradley 1746-HSTP1 SLC 500 Stepper Controller Module

Product Introduction

The 1746-HSTP1 from Allen-Bradley is a dedicated stepper controller module. It belongs to the SLC 500 series and occupies a single slot. You can use it with many SLC processors, including the 5/01, 5/02, 5/03, 5/04, and 5/05 models.

This module controls one axis of stepper motion. It outputs a pulse train from 1 to 250,000 pulses per second. The acceleration follows a trapezoidal velocity profile, ranging from 1 to 2000 pulses per second².

Additionally, the 1746-HSTP1 accepts differential encoder feedback. It directly interfaces with +5V or +15V encoders. This feedback verifies axis movement without closing the loop.

Key Technical Specifications

The 1746-HSTP1 draws 200 mA from the 5V backplane and 90 mA from the 24V backplane. Its input frequency reaches 250 kHz. The acceleration step rate is 4 milliseconds or less.

Absolute positioning goes beyond ±8,000,000 counts. This high resolution suits micro-stepping applications. The module updates every 4 milliseconds.

Thermal dissipation is rated at 1.5 W (both min and max). Operating temperature ranges from 0°C to 60°C. Storage temperature spans -40°C to 85°C.

Inputs, Outputs, and Feedback

The 1746-HSTP1 provides differential inputs for encoder feedback. It also includes digital outputs for the stepper translator. Auxiliary inputs accept 12-24V DC single-ended signals.

For encoder compatibility, the module works with +5V DC differential or +15V differential encoders. It also supports single-ended TTL and opto-coupler interfaces.

Pulse train switching operates at 7-30 mA with a 5V DC signal. The translator output connects directly to compatible stepper drives.

Installation and Wiring

Use the 1746-HT and 1746-HCA I/O connection cables with the 1746-HSTP1. Follow these steps for proper setup:

1. Turn off all power to the SLC 500 chassis.

2. Insert the 1746-HSTP1 into any available slot.

3. Secure the module with its retaining screws.

4. Connect the encoder wiring to the differential inputs.

5. Wire the digital outputs to your stepper translator.

6. Apply power and configure the module via ladder logic.

Keep encoder cables shielded and separated from power wiring. This reduces noise and improves reliability at high speeds.

Diagnostics and LED Indicators

The 1746-HSTP1 includes embedded loopback diagnostics. These monitor the pulse train commands sent to the translator.

Several LED indicators provide real-time status:

• Programming errors

• Normal operation

• Abnormal conditions

• System faults

No DIP switches are needed for configuration. All settings are done through the SLC processor's program.

Compatibility and System Integration

This module works with fixed-style SLC products that have a 2-slot expansion rack. It also fits modular SLC 5/01 through 5/05 systems.

Through the 1746-ASB module, the 1746-HSTP1 can be used in larger PLC systems. This makes it flexible for distributed motion control applications.

Mechanical and Environmental Data

Estimated dimensions are 5" x 2" x 6" (13 cm x 5 cm x 15 cm). Weight is approximately 15 oz (0.43 kg).

Relative humidity must stay between 5% and 95% non-condensing. Altitude should not exceed 2000 meters.

Packaging List

• 1746-HSTP1 stepper controller module – 1 unit

• 1746-HT I/O connection cable – 1 unit (if ordered)

• 1746-HCA auxiliary cable – 1 unit (if ordered)

• Quick start guide (digital download)

Note: No certificates or warranty documents are included in the package.

Shipping Methods

We ship worldwide using FedEx, UPS, or DHL. Tracking information is provided within 24 hours after dispatch.

Frequently Asked Questions (FAQ)

1. Does the 1746-HSTP1 support closed-loop control?
No. The 1746-HSTP1 uses open-loop control with encoder feedback for verification only. It does not correct position errors in real time.

2. What type of encoder works with this module?
It accepts differential encoders with +5V or +15V signals. Single-ended TTL encoders are also compatible through proper interface wiring.

3. Can I control more than one axis with one 1746-HSTP1?
No. This module controls only one axis per unit. For multi-axis systems, use multiple 1746-HSTP1 modules.

4. Is the 1746-HSTP1 compatible with SLC 5/01 processors?
Yes. It works with SLC 5/01, 5/02, 5/03, 5/04, and 5/05 processors. It also fits fixed-style SLC hardware with a 2-slot expansion rack.

5. How do I configure acceleration and speed?
You set these parameters through the SLC processor's ladder logic program. No DIP switches are required. The trapezoidal profile is programmable between 1 and 2000 pulses per second².