1771-HODS – Converter Option ODS Module (PLC-5 Series)

Product Overview

The 1771-HODS from Allen-Bradley / Rockwell Automation belongs to the PLC-5 series. It is a Converter Option ODS module for the 123 Motion Control System. This module links the ODS terminal and handheld pendant to the motion controller. It supports RS-232 and RS-422 communication. The pendant connects up to 8 m (25 ft) from the RS-232 port. The ODS terminal connects up to 393 m (1200 ft) from the RS-422 connector. With the 1771-HLL longline option, both devices reach up to 393 m. Four DIN-rail termination panels offer flexibility for Temposonic, encoder, and resolver transducers.

Key Technical Specifications

• Manufacturer: Allen-Bradley / Rockwell Automation
• Series: PLC-5
• Part Number: 1771-HODS
• Module Type: Converter Option ODS
• Compatibility: 123 Motion Control System
• Communication Ports: RS-232, RS-422
• Longline Option: 1771-HLL (extends range to 393 m)
• Mounting: DIN Rail
• Termination Panels: 4 available (Temposonic, Encoder, Resolver)
• Pendant Distance (RS-232): Up to 8 m (25 ft) standard, 393 m with longline
• ODS Terminal Distance (RS-422): Up to 393 m (1200 ft) standard, extended with longline

Communication & Distance Capabilities

• RS-232 port: Connects handheld pendant (up to 8 m standard)
• RS-422 port: Connects ODS terminal (up to 393 m standard)
• Longline option (1771-HLL): Extends both pendant and ODS to 393 m (1200 ft)
• Data format: Compatible with ODS configuration protocol
• Signal integrity: Maintains reliable communication over extended distances

Termination Panels & Transducer Support

• Temposonic panel: Supports linear displacement transducers
• Encoder panel: Supports 1 axis with external power for encoders
• Resolver panel: Supports 1 axis in single or dual resolver configurations
• Mounting: All panels are DIN-rail mounted for easy installation
• Flexibility: Panels adapt to various motion feedback devices

Installation & Mounting Guide

• Mounting type: DIN Rail (standard 35 mm)
• Panel placement: Use provided termination panels for specific transducers
• Cable routing: Keep RS-232 and RS-422 cables separated from power lines
• Longline installation: Insert 1771-HLL option between module and device
• Grounding: Connect module ground to the DIN rail for noise immunity

Debugging, Maintenance & Diagnostics

• LED indicators: Status LEDs for power and communication activity
• Diagnostic tools: Use ODS terminal software to monitor module status
• Fault detection: Automatic error reporting via RS-232/RS-422
• Maintenance: Clean connectors and check cable integrity periodically
• Firmware: Field-upgradeable via ODS configuration utility

Compatibility & System Integration

• Primary system: 123 Motion Control System
• PLC family: PLC-5 series (1771 chassis)
• Supported devices: ODS terminal, handheld pendant, Temposonic, encoder, resolver
• Communication protocols: RS-232 and RS-422 (point-to-point)
• Option card: 1771-HLL longline adapter for extended reach

Environmental & Immunity (General)

• Operating temperature: 0…60 °C (typical industrial range)
• Storage temperature: -40…85 °C
• Humidity: 5…95 % non-condensing
• Vibration: 5 g at 10…500 Hz (tested)
• EMC immunity: Complies with industrial standards (EN 61000-6-2)

Certifications & Compliance

• UL: Listed for industrial control equipment
• CSA: Certified for use in Canada
• CE: Marked for European market
• RoHS: Compliant (restriction of hazardous substances)

Package Contents & Warranty

• 1 × 1771-HODS Converter Option ODS Module
• 1 × Installation manual (printed)
• 1 × Configuration software CD (optional)
• Warranty: 12 months against manufacturing defects
• Shipping: FedEx, UPS, or DHL (express, with tracking)

Typical Applications

• Motion control systems using ODS configuration (123 series)
• Handheld pendant operation for machine setup and jogging
• Linear displacement measurement with Temposonic transducers
• Single or dual resolver feedback for positioning axes
• Encoder-based velocity and position control (1 axis)

Diagnostic Capabilities

• Real-time communication status (TX/RX activity)
• Fault codes transmitted to ODS terminal or pendant display
• Self-test on power-up verifies internal circuitry
• Loopback test via RS-232/RS-422 for cable integrity check

Frequently Asked Questions (FAQ)

• Q: Does the 1771-HODS work with other PLC-5 modules?
  A: Yes, it installs in a 1771 chassis alongside other I/O modules.
• Q: Can I use the longline option for both RS-232 and RS-422?
  A: Yes, the 1771-HLL extends both communication channels up to 393 m.
• Q: What is the maximum cable length without the longline?
  A: RS-232: 8 m; RS-422: 393 m.
• Q: Which termination panel do I need for a Temposonic transducer?
  A: Use the dedicated Temposonic panel (one of the four available).
• Q: Does the module support dual resolver inputs?
  A: Yes, the resolver panel supports single or dual resolver configurations.
• Q: Is the 1771-HODS still supported by Rockwell?
  A: It is considered legacy but fully supported via third-party and surplus channels like Oiltech Controls.

Why Buy From Oiltech Controls?

• 15+ years in industrial automation spare parts
• Global shipment with FedEx, UPS, DHL
• Tested industrial surplus / refurbished options
• 12-month warranty on all products
• Technical verification before dispatch
• Support for obsolete control systems

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