Siemens 6ES5901-7FA11 Comparison Module

Technical Overview

The Siemens 6ES5901-7FA11 is an analog comparison module for the SIMATIC S5 programmable controller series. This unit monitors analog signals and triggers outputs based on predefined threshold conditions. It compares up to two input values against setpoints and generates digital outputs when conditions match. A 12-position rotary switch on the front panel allows quick configuration of comparison parameters.

Technical Specifications

Parameter	Specification
Manufacturer	Siemens
Model Number	6ES5901-7FA11
Product Type	Comparison Module
System Compatibility	SIMATIC S5
Number of Inputs	2 analog
Number of Outputs	2 digital
Input Signal Range	0–10V or 4–20mA
Resolution	10 bits
Comparison Accuracy	±1% of full scale
Configuration	12-position rotary switch
Response Time	2 ms (typical)
Power Consumption	3 W
Dimensions	233 x 37 x 268 mm
Weight	0.38 kg
Operating Temperature	0°C to +60°C
Storage Temperature	-40°C to +85°C
Certifications	CE, UL, CSA
Country of Origin	Germany

Key Features

Dual-Channel Comparison – The module processes two analog inputs simultaneously for efficient monitoring.

Adjustable Thresholds – The 12-position rotary switch provides simple configuration of comparison parameters.

Fast Response – The 2 ms response time enables quick reactions to changing process conditions.

Flexible Signal Compatibility – Each channel accepts both voltage and current input signals.

Integrated Outputs – Two digital outputs provide direct signaling without additional modules.

Applications

The Siemens 6ES5901-7FA11 excels in process monitoring, limit detection, and quality control applications. It is ideal for temperature alarms, pressure monitoring, and level control in industrial processes.