Siemens 6ES5254-4UA21 MOBY Interface

Seamless RFID Integration for SIMATIC S5 Systems

The Siemens 6ES5254-4UA21 functions as a dedicated MOBY interface module, connecting RFID readers to the SIMATIC S5 programmable controller platform. This module handles data exchange between the CPU and up to four MOBY identification readers for tracking applications. Its compact housing measures 250 mm in height, 25 mm in width, and 160 mm in depth, fitting standard S5 rack slots efficiently. The total weight reaches approximately 0.5 kg, making it a lightweight yet capable addition to automation systems.

This interface supports reading and writing operations to MOBY transponders with up to 200 bytes of user data. The following table details the complete technical specifications for this RFID interface solution:

Parameter	Specification
Product Brand	Siemens
Product Model	6ES5254-4UA21
Product Category	MOBY Interface Module
Platform Compatibility	SIMATIC S5 (all CPU variants)
Supported Readers	Up to 4 MOBY readers
Communication Protocol	RS-232 (point-to-point)
Data Transfer Rate	9600 baud (configurable)
User Data per Transponder	200 bytes maximum
Read/Write Operations	Supported
Dimensions (H x W x D)	250 mm x 25 mm x 160 mm
Weight	0.5 kg
Supply Voltage	5 V DC (from backplane)
Power Consumption	2.0 W typical
Operating Temperature	0°C to +60°C
Storage Temperature	-40°C to +85°C
Isolation Voltage	1500 V AC (reader-to-backplane)

Reader Connectivity and Data Handling

The 6ES5254-4UA21 connects up to four MOBY readers through dedicated RS-232 interfaces. This module transmits read/write commands and receives transponder data over the S5 backplane. The system supports user data blocks of up to 200 bytes per transponder for flexible tracking. Engineers can therefore implement product tracing, tool identification, and material tracking.

Communication Protocol and Configuration Options

A configurable baud rate of 9600 baud ensures reliable data transfer with standard MOBY readers. The module supports both polling and event-driven data exchange for optimized communication. Users can configure the interface parameters through STEP 5 software tools. This configuration flexibility adapts the module to various reader types and application requirements.

System Integration and Application Examples

The MOBY interface integrates seamlessly with S5 CPUs for automated material tracking in manufacturing. Common applications include workpiece identification on conveyor systems and tool management in machining centers. This module also supports access control for personnel and equipment. Manufacturers can therefore enhance traceability using the module’s robust RFID capabilities.