Siemens S7 1200 SM 1278 IO-Link Master 6ES7278-4BD32-0XB0Price in Bangladesh | Siemens I/O Link Master Module Best Price

• Siemens Communication Module

  Part Number: 6ES7278-4BD32-0XB0

  Parameter	Specification
  Product Family	CM 1241 Communication Module
  PLC Series	SIMATIC S7-1200
  Communication Interface	RS-422 / RS-485
  Connector Type	9-pin D-Sub (Female)
  Communication Protocol	Freeport / Modbus RTU (Master or Slave)
  Transmission Speed	Up to 115.2 kbps
  Supply Voltage	24 V DC (via PLC backplane bus)
  Isolation	Galvanic isolation between PLC and communication line
  Dimensions (W × H × D)	30 × 100 × 75 mm
  Mounting	DIN Rail beside S7-1200 CPU
  Protection Class	IP20

  Product Description:
  6ES7278-4BD32-0XB0 is a SIMATIC S7-1200 CM1241 communication module providing RS-422 / RS-485 serial communication. It enables the PLC to connect with devices such as HMI panels, VFDs, energy meters, barcode scanners, and other industrial controllers using Modbus RTU or Freeport protocols.

  Key Features

  • RS-485 / RS-422 serial communication interface

  • Supports Modbus RTU master or slave

  • Freeport protocol for custom serial communication

  • Galvanic isolation for reliable industrial communication

  • Configurable through TIA Portal

  Typical Applications

  • PLC communication with VFD drives

  • Connecting Modbus RTU energy meters

  • Interface with barcode scanners / printers

  • Industrial serial device integration

  Example Communication Setup

  Device	Interface
  PLC (S7-1200 CPU)	PROFINET
  CM1241 Module (6ES7278-4BD32-0XB0)	RS-485 / RS-422
  VFD / Energy Meter	Modbus RTU
  HMI Panel	PROFINET

Comparison with Other S7-1200 Temperature Modules

6. Analog Input / Output Combined Modules (SM 1234)

Module	Description	Part Number
SM 1234	4AI / 2AO	6ES7234-4HE32-0XB0
SM 1234	2AI / 2AO (Signal board type)	6ES7234-5HD30-0XB0