Siemens 6GK7242-5DX30-0XE0 SIMATIC S7-1200 CM 1242-5 PROFIBUS DP Communication Module

The Siemens 6GK7242-5DX30-0XE0 CM 1242-5 is a communication module that connects a SIMATIC S7-1200 CPU to PROFIBUS as a DP slave device, supporting DPV0 and DPV1 services at transfer rates from 9.6 kbit/s to 12 Mbit/s. It mounts as a compact single-width module on the CPU's left side, drawing 0.15 A from the 5 V backplane bus.

Technical Specifications

Certifications & Standards

• CE
• UKCA
• KC
• RCM
• RoHS
• EAC
• ATEX
• IECEx
• CCC
• FM

Selection Notes

Choose the CM 1242-5 when an S7-1200 station needs to act as a PROFIBUS DP slave rather than a master — its RS485 interface covers the full 9.6 kbit/s to 12 Mbit/s DP range, so it can join networks alongside faster masters. Up to three units can be installed per CPU, useful when one station has to expose more than one DP slave address. Configuration requires STEP 7 Basic or Professional, and its 0.75 W power loss and 0.15 A backplane draw should be included when sizing the S7-1200 power budget on larger I/O configurations.

Applications

Fits SIMATIC S7-1200-based machine or process stations that report into a higher-level PROFIBUS DP master — common where an S7-1200 controller sits nested under an S7-400 or third-party DP master in a mixed-generation plant network.