Product Overview

The CTI 901E-2558 Analog Input Module is a high-performance 8-channel analog input module designed for the CTI 2500 Classic series and compatible PLC platforms -1-7. This module serves as a precision interface between field sensors and the control system, converting analog signals such as voltage and current into digital values that can be processed by the controller. The 901E-2558 CTI module is a critical component for industrial automation systems requiring accurate and reliable data acquisition from temperature, pressure, flow, and other process transmitters.

Manufactured by Control Technology Inc. (CTI), the CTI 901E-2558 is part of the 2500 Classic series, a platform known for its robustness and compatibility with legacy Siemens SIMATIC 545/555 systems -1-7. Each of the eight channels on the 901E-2558 is independently configurable for various signal types, including ±10V, 0-10V, 0-20mA, and 4-20mA, offering exceptional flexibility for connecting diverse field instruments -1-7. The module’s 16-bit resolution ensures precise signal conversion, with typical accuracy of ±0.05% to ±0.1% of full scale, making it suitable for demanding process control and monitoring applications -2-7.

One of the key design strengths of the CTI 901E-2558 is its channel-to-channel isolation, which protects the control system and other channels from faults or transients occurring on a single input -1-7. This feature is particularly valuable in industrial environments where electrical noise and ground loops are prevalent. The 901E-2558 CTI is also a direct, drop-in replacement for the Siemens 505-6108 analog input module, offering a cost-effective solution for maintaining and upgrading legacy systems without requiring wiring modifications -1. With its robust design, flexible configuration, and high precision, the CTI 901E-2558 is an essential component for reliable and accurate analog signal acquisition.

Technical Specifications