Product Summary
The 1771-HS3A is a three-axis servo controller from Rockwell Automation for the PLC-5 platform. It manages precise motion through resolver and encoder feedback. This module operates with solenoids, indicators, and AC motor starters inside a 1771 I/O chassis.
Engineering Procurement Guide for the 1771-HS3A
Selecting the correct servo controller ensures system reliability and performance. The 1771-HS3A requires a 1771-PS7 power supply for operation. This supply provides 120-240V AC at 1A and 2A via a 9-pin CAS cable.
The module draws 1.7 Amperes from the backplane. It occupies two slots per expansion module. Engineers must use the wiring arm 1771-WA for termination.
The controller accepts differential encoder inputs at 250 kilohertz maximum. It outputs analog commands of ±10 V DC. The update period per axis is 2 milliseconds.
Memory uses a 1771-HMA cartridge with 96 KB battery-backed storage. This holds AMP parameters and MML programs. An RS-232 port connects to T45 or T50 operator display stations.
For parameter tuning, engineers can attach an optional handheld pendant. This device modifies system variables directly on the line. The module also provides resolver excitation to generate sine and cosine signals.
Expert Technical Performance Review
The 1771-HS3A delivers reliable motion control for industrial automation. Its resolver feedback loop excites the stator with precise sine and cosine waves. Encoder feedback offers 10V DC isolated outputs.
Single-ended encoder inputs run at 20 kHz while differential inputs reach 250 kHz. Pulse capture time ranges from 50 to 9.999 microseconds. This enables accurate registration in high-speed applications.
Environmental tolerances include operation from 0°C to 60°C ambient. Relative humidity stays between 5% and 95% without condensation. The module carries c-UL, C-TICK, and CE certifications for global compliance.
Front-panel LEDs indicate status for power, fault, and axis activity. The compact dimensions are 3.5 x 6.5 x 2.0 inches (89 x 165 x 51 mm). This fits standard 1771 rack slots without extra footprint.
Logistics & Standard Packaging Details
