Siemens Power Module 24 V DC SIMATIC ET 200S PM-E 6ES7138-4CA01-0AA0

Description

The 6ES7138-4CA01-0AA0 is a SIMATIC ET 200S PM-E power module (24 V DC) used in distributed I/O systems (SIMATIC DP).

It is designed to:

• Supply and monitor 24 V DC load voltage for a voltage group
• Provide segmentation of load groups within ET 200S stations
• Deliver diagnostic feedback to the controller (DP master)

The module continuously monitors supply voltage and reports faults such as missing load voltage via diagnostics and LEDs.

Status: Typically listed as a spare part (legacy ET200S platform).

Key Features

• Power module for ET 200S distributed I/O
• 24 V DC supply only
• Integrated:
  • Voltage monitoring
  • Diagnostics (status byte + LED indication)
• Enables electrical isolation between voltage groups
• Compact modular design (control cabinet optimized)

Technical Specifications

Electrical Data

• Rated load voltage:
  • 24 V DC
• Input current (no load):
  • ≤ 4 mA
• Max current capacity:
  • 10 A (up to 60°C)
• Power loss:
  • ~ 0.1 W (typ.)

Protection & Electrical Characteristics

• Reverse polarity protection: Yes
• Short-circuit protection:
  • Not integrated (requires external protection)
• Isolation:
  • Between load voltage and backplane bus
• Insulation test voltage:
  • 500 V DC

Diagnostics & Status

• Diagnostic functions: Yes
• Detects:
  • Missing load voltage
• LED indicators:
  • Green: PWR (load voltage present)
  • Red: SF (group fault)
• Parameter size: 3 bytes (configurable diagnostics)

Mechanical Data

• Dimensions (W × H × D):
  • 15 × 81 × 52 mm
• Weight:
  • ~ 35 g
• Mounting:
  • ET 200S terminal module (TM-P series)

Environmental Conditions

• Operating temperature:
  • Typically 0 to 55–60°C (depending on installation)

Functional Characteristics

• Voltage type: DC only (24 V)
• Function:
  • Power supply + monitoring for I/O group
• Potential separation:
  • Yes (between voltage groups)
• Addressing:
  • Status byte available in process image for diagnostics

System Integration

• System: SIMATIC DP
• Platform: ET 200S
• Terminal compatibility: TM-P terminal modules
• Application scope:
  • Digital and analog I/O groups (except certain AC modules)

Typical Applications

• Industrial automation panels
• Distributed I/O stations
• Manufacturing and process systems
• Segmented power distribution for field devices

Summary (Engineer’s View)

This module is a dedicated 24 V DC power distribution and monitoring unit for ET200S systems. Compared to the 4CB11 variant, it is:

• DC-only (simpler, more common in control systems)
• Slightly lower complexity (no AC support)
• Focused on stable 24V industrial control architectures

It is best suited for:

• Standard PLC panels
• Clean DC power environments
• Legacy ET200S maintenance and spares

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