GE UR8AH high-performance current transformer (CT)/voltage transformer (VT) module

Description

The GE UR8AH is a precision-engineered current and voltage conversion module designed specifically for industrial automation and control systems. It plays a crucial role in applications requiring accurate transformation of analog current signals (4-20 mA range) into corresponding voltage signals or vice versa. Widely used in manufacturing plants, utility substations, and heavy industry sectors, this module is essential for control systems that depend on reliable signal conditioning to interface between sensors, meters, and digital controllers. The GE UR8AH is particularly applicable in environments where high accuracy and noise immunity are necessary to maintain system stability and performance, such as process control loops, motor control centers, and power monitoring systems.

The GE UR8AH is part of GE’s Multilin Universal Relay (UR) series, functioning as a CT/VT (current transformer/voltage transformer) conversion interface module. It serves as a bridge that standardizes analog input signals for processing by digital relays or PLCs in complex automation systems. This module fits seamlessly into UR control frames, expanding the system’s input handling capabilities by converting various field signals to formats understandable by the UR Series relays or other control devices. Compatibility with RS485 for Modbus RTU communication ensures flexible integration into networked control environments. Its design supports enhanced diagnostics and status reporting, enabling system integrators and engineers to streamline troubleshooting and optimize control strategies effectively.

Technical highlights of the GE UR8AH include 16-bit signal conversion resolution, ensuring ultra-precise current and voltage measurement. It supports a broad input current range of 0-20 mA and adapts voltage inputs from 1 to 120 V AC or DC, providing comprehensive signal conditioning flexibility. The module operates reliably in temperatures as low as –40°C and up to +85°C, suitable for use in demanding industrial environments. Its compact design measures approximately 4.375 inches in width, 1.75 inches in height, and 0.625 inches in depth, with a weight of about half a pound, allowing easy installation in standard control cabinets. Power requirements are modest, typically 24 VDC, making it compatible with common industrial power supplies. The unit’s robust build enhances immunity to electrical noise and provides stable, accurate signal conversion for system longevity.

Companion or related GE modules include:

UR8NH – An analog input module complementing the UR8AH’s conversion capabilities.
UR6AH – A related digital input/output module in the UR series for expanded control.
UR9EH – Enhanced I/O device for interfacing extended sensor arrays.
UR4EH – A simplified relay output module designed to work with UR Control systems.
UR695 – Universal relay providing protection and control functions integrated with UR8AH signals.

Installation requires ensuring a stable 24V DC power source and proper electrical grounding to avoid noise interference in signal transmission. The module’s compact size allows flexible mounting in standard relay racks or control cabinets. Maintenance should include verifying communication integrity through RS485 connections and routine cleaning of connectors to preserve signal quality. Firmware or configuration parameters may be updated via associated control software to maintain compatibility with evolving automation systems.