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Allen Bradley PLC 5 1770-XT

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1770-XT

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The 1770-XT terminal resistor from Allen Bradley is designed for use in PLC 5 systems, particularly with clutch and brake controllers. This component ensures effective communication and signal termination within the control system, supporting various modules and chassis.

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Not an Authorized Distributor: DO Supply is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All of our products come with DO Supply's 2-year warranty.
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Rockwell Disclaimer: The product is used surplus. DO Supply is not an authorized surplus dealer or affiliate for the Manufacturer of this product. The product may have older date codes or be an older series than that available direct from the factory or authorized dealers. Because DO Supply is not an authorized distributor of this product, the Original Manufacturer's warranty does not apply. While many Allen-Bradley PLC products will have firmware already installed, DO Supply makes no representation as to whether a PLC product will or will not have firmware and, if it does have firmware, whether the firmware is the revision level that you need for your application. DO Supply also makes no representations as to your ability or right to download or otherwise obtain firmware for the product from Rockwell, its distributors, or any other source. DO Supply also makes no representations as to your right to install any such firmware on the product. DO Supply will not obtain or supply firmware on your behalf. It is your obligation to comply with the terms of any End-User License Agreement or similar document related to obtaining or installing firmware.

Technical specifications for 1770-XT

ManufacturerAllen Bradley
Product TypeTerminal Resistor
Product LinePLC 5
Part Number1770-XT
Weight3.00 lbs (1.36 kg)
Product SeriesBulletin 1771
Compatible ControllersClutch/Brake Controllers
Number of Terminal Resistors per Controller4 Resistors
Controller Scanner ModulesCompatible
Number of Resistors per Scanner Module1 Resistor
Clutch/Brake ChassisCompatible
Number of Resistors per Clutch/Brake Chassis1 Resistor
Remote I/O ChassisCompatible
Number of Resistors per Remote I/O Chassis1 Resistor
Chassis Installation RequirementsLast chassis in the clutch/brake controller system
Compatible CableCable between chassis A and B at terminals 7-9 of the 1771-PM wiring arm
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The 1770-XT component, produced by Allen Bradley for the PLC 5 series, acts as a terminal resistor tailored for integration with clutch/brake controller systems. Within each controller, 4 terminal resistors can be configured, which enhances signal reliability. Notably, this terminal resistor also supports compatibility with scanner modules and can be utilized as 1 resistor per module. It serves the same function in both the clutch/brake chassis and the remote I/O chassis, with 1 resistor allocated for each in their respective systems.

For optimal performance, the installation of the terminal resistor must be at the end of the clutch/brake controller chain, ensuring that it concludes the necessary electrical configuration. Furthermore, this terminal resistor requires a specific cable connection, namely between chassis A and B, which interfaces at terminals 7-9 on the wiring arm of the 1771-PM module. This configuration is critical for maintaining the integrity of the communication within the system.