Siemens 6GK7243-5DX30-0XE0 | S7-1200 CM 1243-5

The Siemens 6GK7243-5DX30-0XE0 is a communications module for the SIMATIC S7-1200 controller series. This module enables the S7-1200 to operate as a PROFIBUS DP master on a PROFIBUS network. It provides PG/OP communication and S7 communication capabilities . Consequently, it delivers flexible connectivity for distributed automation architectures.

Technical Specifications

The Siemens 6GK7243-5DX30-0XE0 comes in a compact S7-1200 single-width form factor. The module measures 30 mm in width, 100 mm in height, and 75 mm in depth . It weighs approximately 0.134 kg, making it lightweight for panel installation . The unit offers IP20 protection for standard industrial environments. It supports a 24 V DC external power supply with a typical current consumption of 0.1 A and power loss of 2.4 W .

Key Technical Data

Parameter	Specification
Product Type	CM 1243-5 Communications Module
Product Designation	PROFIBUS DP Master Module
Compatibility	SIMATIC S7-1200
Transfer Rate	9.6 kbit/s … 12 Mbit/s
PROFIBUS Interface	9-pin Sub-D socket (RS485)
Supply Voltage	24 V DC (nominal, ±20%)
Current Consumption	0.1 A typical
Power Loss	2.4 W
Protection Class	IP20
Dimensions (W x H x D)	30 x 100 x 75 mm
Net Weight	0.134 kg
Mounting	35 mm DIN rail or wall mounting

PROFIBUS DP Master Performance

The Siemens 6GK7243-5DX30-0XE0 provides robust DP master functionality for demanding networks. It supports up to 32 DP devices in a single master configuration . The module handles 512 bytes of input and output data total, with 244 bytes per device . It also supports DPV1 services for enhanced diagnostics and parameterization . The module works with up to 8 S7 communication connections simultaneously . Additionally, it offers multi-protocol mode with up to 8 active connections with or without DP . This performance makes it an ideal solution for distributed I/O applications.

Installation and System Integration

The Siemens 6GK7243-5DX30-0XE0 mounts directly onto a 35 mm DIN rail or attaches to a wall . The PROFIBUS connector sits behind the lower cover of the module housing . Configuration requires STEP 7 Basic or Professional software . The module operates across an ambient temperature range of 0 °C to 55 °C for horizontal installation . It also holds numerous marine and hazardous location approvals, including ABS, DNV, ATEX, and IECEx . Therefore, this communication module provides reliable performance for a wide range of industrial automation tasks.