Siemens 6ES5243-1AA11 Input Module

Engineered for SIMATIC S5 Digital Signal Acquisition

This module reads digital signals from field sensors and switches. It provides reliable input detection for the Siemens 6ES5243-1AA11 unit. You will find this input card in the SIMATIC S5 series. Unlike low-density modules, this version supports sixteen independent channels. It handles both mechanical contacts and proximity sensors.

Technical Specifications & Physical Dimensions

We designed this input module for high-channel-count applications. 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)
Input Channels	16 digital inputs
Input Voltage Range	24V DC nominal (20V – 30V)
Input Current per Channel	7 mA typical at 24V
Response Time	8 milliseconds (software configurable)
Input Type	Sink/source (optically isolated)
Component Count	16 optocouplers, 16 input filters

Functional Architecture and Input Configuration

This module connects to pushbuttons, limit switches, and sensors. It uses sixteen optocouplers for complete electrical isolation. You can wire each input to either sink or source configurations. Moreover, the module includes programmable input filters on every channel. These components reject electrical noise and contact bounce. Consequently, the board delivers clean signal status to the CPU.

Installation and Operational Guidelines

The Siemens 6ES5243-1AA11 updates input status every 8 milliseconds. It provides 500V isolation between field circuits and backplane. You must connect the common terminal to 24V DC supply ground. Always use twisted-pair cables for long input runs beyond 50 meters. This practice reduces false triggering from induced noise. Furthermore, the module includes one green LED indicator per input. This feature allows immediate visual status checking across all 16 channels.

Physical Characteristics and Environmental Limits

This input module has a rugged, industrial-grade plastic housing. Its substantial 0.55 kg weight reflects the sixteen-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.