Siemens 6ES7541-1AD00-0AB0 SIMATIC S7-1500 CM PtP RS232 HF 115.2 kbit/s Communication Module

The Siemens 6ES7541-1AD00-0AB0 is a SIMATIC S7-1500 CM PtP RS232 HF point-to-point communication module for RS232 serial connections up to 115.2 kbit/s through a 9-pin D-sub connector, supporting Freeport, 3964(R), USS, and Modbus RTU master or device operation. It draws 50 mA from the backplane bus and mounts directly on the S7-1500 rail.

Technical Specifications

Selection Notes

The HF designation raises RS232 throughput to 115.2 kbit/s and adds Modbus RTU master or device operation with an 8 kbyte telegram buffer, well beyond a base RS232 PtP module's lower baud rate and smaller buffer. Modbus RTU master mode on this module addresses a single device only, 1 to 247 with extended addressing to 65535, so it suits a dedicated point-to-point Modbus link rather than a multidrop network; multidrop or long-distance wiring needs an RS422/RS485 interface module instead. The 15 m RS232 cable limit keeps this module tied to devices mounted close to the control cabinet.

Applications

Point-to-point RS232 links at 115.2 kbit/s to a single nearby device, such as a Modbus RTU-capable drive, barcode scanner, or operator terminal within 15 m of the S7-1500 station, using Freeport or 3964(R) framing where Modbus is not required.