Siemens 6ES5461-8MA11 Comparator Module

Engineered for SIMATIC S5 Analog Value Monitoring

This module compares analog input signals against preset reference values. It provides threshold detection for the Siemens 6ES5461-8MA11 unit. You will find this comparator card in the SIMATIC S5 series. Unlike basic modules, this version supports four independent comparator channels. It generates digital outputs when analog signals cross programmable limits.

Technical Specifications & Physical Dimensions

We designed this comparator module for reliable limit monitoring. The table below presents all verified technical specifications.

Parameter	Specification
Physical Dimensions (W x H x D)	160mm x 125mm x 50mm
Total Weight	0.55 kg (550 grams)
Comparator Channels	4 independent channels
Analog Input Range	0V to 10V DC (±10V optional)
Input Impedance	20 kΩ per channel
Output Type	24V DC digital (open collector)
Component Count	4 comparator ICs, 8 potentiometers, 4 optocouplers

Functional Architecture and Threshold Configuration

This module compares each analog input to an adjustable reference. It uses four independent comparator circuits for simultaneous monitoring. You can set each threshold using onboard potentiometers. Moreover, the module includes hysteresis on every comparator channel. This component prevents output chatter near the threshold point. Consequently, the board delivers stable output signals without rapid toggling.

Installation and Operational Guidelines

The Siemens 6ES5461-8MA11 responds to input changes within 1 millisecond. It provides 500V isolation between analog inputs and backplane. You must calibrate each potentiometer before system operation. Always use shielded cables for analog input connections. This practice reduces noise-induced false triggering events. Furthermore, the module supports window comparator mode for each channel. This feature detects values both above and below a set range.

Physical Characteristics and Environmental Limits

This comparator module has a rugged, industrial-grade plastic housing. Its substantial 0.55 kg weight reflects the four-channel design quality. The layout follows Siemens standard S5 module specifications. Therefore, it fits securely into any SIMATIC S5 rack. The module requires one slot width for installation. In addition, it maintains stable operation between 0°C and 60°C ambient temperature. You can store this unit safely between -40°C and 85°C.