You are here:
SKU: 6ES7138-4DF00-0AB0

Siemens Serial Interface Module 6ES7138-4DF00-0AB0

The Siemens SIMATIC DP ET 200S 1 SI (6ES7138-4DF00-0AB0) is a high-performance serial communication module developed for distributed automation networks. It features a single serial interface channel that supports RS232C, RS422, and RS485 physical hardware standards alongside ASCII and 3964R protocols. Designed with a ultra-slim 15 mm form factor, this active module establishes reliable point-to-point connections between ET 200S remote I/O topologies and legacy field instruments like barcode readers, printers, or third-party controllers.

Functional Overview

The Siemens 6ES7138-4DF00-0AB0 serial interface module executes bidirectional data exchanges between centralized programmable logic controllers and isolated serial peripherals. Operating as an intelligent communication processor within the decentralized SIMATIC DP ET 200S I/O rack, this device translates proprietary hardware protocols into standard serial formats effortlessly. The integration of this module eliminates the need for expensive external protocol converters or specialized standalone gateways. Consequently, system integrators can connect intelligent field sensors, scanners, and weighing electronics directly to their primary fieldbus network architecture.

Technical Characteristics

  • Brand: Siemens
  • Product Line: SIMATIC DP / ET 200S Distributed I/O System
  • Module Classification: 1 SI Serial Interface Module (Point-to-Point)
  • Article Number: 6ES7138-4DF00-0AB0
  • Serial Transmission Interfaces: RS232C, RS422, and RS485 (software selectable)
  • Supported Data Protocols: ASCII and Siemens 3964R
  • Maximum Data Rate: Up to 19.2 kbit/s for reliable long-range signal fidelity
  • Maximum Cable Extension: 1200 meters when utilizing the RS422/485 interface
  • Input Power Requirements: 24 V DC backplane supply voltage via standard PM-E modules
  • Diagnostic Feedback: Integrated LED indicators displaying Group Fault (SF), Transmit (TxD), and Receive (RxD) parameters
  • Enclosure Dimensions: 15 mm space-saving housing width
  • Net Weight: Approximately 0.24 kg
  • Manufacturing Origin: Germany
  • Base Module Compatibility: Fits securely onto Type TM-E terminal modules

Industrial Applications

Control panel builders specify the Siemens 6ES7138-4DF00-0AB0 module extensively within material handling, warehouse logistics, and automated factory assembly lines. Because the device handles variable-length ASCII character strings efficiently, it connects legacy point-of-use hardware like barcode scanners and localized industrial printers straight into the main PLC data tables. Furthermore, process engineers leverage the rugged RS485 communication layer to manage variable speed drives, specialized environmental instrumentation, and older operator panels that lack native Profibus or Profinet interfaces.