Siemens 6ES7138-4CF02-0AB0 Replacement for ET 200S

Product Overview

Siemens 6ES7138-4CF02-0AB0 Replacement for ET 200S: Smooth Transition & Legacy System Upgrade

The Siemens 6ES7138-4CF02-0AB0 is the PM-E 24VDC power module designed for the ET 200S distributed I/O station, widely deployed across manufacturing, process automation, and machine-building applications. As this module approaches end-of-life or becomes increasingly difficult to source through standard channels, many facilities are now planning structured replacements to maintain system uptime and avoid unplanned shutdowns.

This listing provides a verified replacement and upgrade solution for the 6ES7138-4CF02-0AB0, sourced from authorized supply chains and tested prior to shipment. Whether you are performing a like-for-like swap on an existing ET 200S station or migrating a broader control architecture, this module is ready to integrate with minimal engineering effort.

The PM-E 24VDC power module supplies the electronic components of the ET 200S station with 24 V DC. It is installed directly on the terminal module TM-P15S23-A0 (6ES7193-4CD20-0AA0) and provides the necessary power rail for downstream electronic modules such as digital input modules, digital output modules, and analog I/O modules mounted in the same station. Replacing this module does not require changes to the field wiring connected to adjacent terminal modules, which significantly reduces retrofit labor time on the shop floor.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful ET 200S power module replacement rarely happens in isolation. In most retrofit and migration projects, the 6ES7138-4CF02-0AB0 is replaced as part of a broader station refresh or system modernization effort. The following components are commonly involved in the same upgrade scope:

The IM 151-1 interface module (6ES7151-1AA06-0AB0) is the PROFIBUS DP head module that governs communication between the ET 200S station and the S7-300 or S7-400 controller. When upgrading aging ET 200S stations, it is common to simultaneously replace the IM 151-1 to eliminate communication faults caused by worn connectors or outdated firmware. For sites migrating to PROFINET, the IM 151-3 PN interface module (6ES7151-3BA23-0AB0) provides a direct upgrade path without requiring a new station layout.

Digital I/O modules such as the 2DI 24VDC HF (6ES7131-4BB01-0AB0) and 2DO 24VDC/0.5A HF (6ES7132-4BB01-0AB0) are frequently replaced alongside the power module during planned maintenance windows. Since these modules share the same terminal module infrastructure, the replacement sequence is straightforward and can be completed without interrupting field wiring.

For analog signal acquisition, the 2AI U (6ES7134-4FB01-0AB0) analog input module is a common companion module in ET 200S stations used in process control applications. Its terminal module remains in place during a power module swap, making combined replacements efficient.

Sites running older S7-300 CPUs — such as the CPU 315-2 DP (6ES7315-2AH14-0AB0) — that communicate with ET 200S via PROFIBUS DP may also consider upgrading the CPU to a CPU 1515-2 PN (6ES7515-2AM02-0AB0) as part of a longer-term migration to the S7-1500 platform. In such cases, the ET 200S station can be retained with the IM 151-3 PN interface module, preserving the existing I/O investment while modernizing the controller layer.

Programming cable PC Adapter USB A2 (6ES7972-0CB20-0XA0) is typically required for on-site commissioning and parameter verification after module replacement, particularly when updating GSD files or verifying station configuration in STEP 7 or TIA Portal.

For installations where signal isolation is required between field devices and the ET 200S station, SITRANS signal isolators and SIRIUS 3RS relay modules are commonly integrated in the same control cabinet, and their wiring remains unaffected by a PM-E power module replacement.

Retrofit Guidance FAQ

Q: Does replacing the 6ES7138-4CF02-0AB0 require any changes to the PLC program?
A: No. The PM-E 24VDC power module is a passive power supply component within the ET 200S station. It does not have its own I/O address or software configuration block. Replacing it does not require any changes to the STEP 7 or TIA Portal project, and no hardware configuration download is needed after the swap.

Q: Can I replace the power module without disconnecting field wiring?
A: Yes. The 6ES7138-4CF02-0AB0 snaps onto the terminal module (TM-P15S23-A0). Field wiring is connected to the terminal module, not to the electronic module itself. The terminal module remains in place during replacement, so field wiring is completely undisturbed. This is one of the key advantages of the ET 200S modular architecture for maintenance operations.

Q: Is this module compatible with both PROFIBUS DP and PROFINET ET 200S stations?
A: Yes. The PM-E power module is independent of the communication protocol used by the interface module. It is compatible with ET 200S stations using IM 151-1 (PROFIBUS DP) and IM 151-3 PN (PROFINET) interface modules without any modification.

Q: What is the physical installation space required?
A: The 6ES7138-4CF02-0AB0 occupies a standard 15 mm slot in the ET 200S station on a 35 mm DIN rail. No additional cabinet space is required for a like-for-like replacement. The module height and depth are identical to the original, ensuring compatibility with existing cable duct and enclosure layouts.

Q: Can this module be used in a mixed ET 200S station with older and newer electronic modules?
A: Yes. The PM-E 24VDC power module is compatible with the full range of ET 200S electronic modules, including both standard and high-feature (HF) variants. Mixed configurations are fully supported within the same station.

Q: What commissioning steps are required after replacement?
A: After installing the replacement module, power on the ET 200S station and verify that the PWR LED on the power module illuminates green. Check the IM 151 interface module for any diagnostic LEDs. In most cases, no additional commissioning steps are required. If the station was previously configured in STEP 7 or TIA Portal, the existing configuration remains valid.

Warranty Assurance

Every 6ES7138-4CF02-0AB0 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Our pre-shipment inspection process includes functional verification, visual inspection for physical damage, and confirmation of firmware and hardware revision compatibility.

In the event of a confirmed defect within the warranty period, we provide replacement support with priority processing to minimize your downtime. Our after-sales response team is available to assist with technical verification, return authorization, and expedited replacement shipment.

We maintain bonded inventory of high-demand ET 200S components to support urgent replacement requirements. Orders confirmed before the daily cutoff are processed for same-day or next-business-day dispatch. Shipping is available worldwide, with tracking provided for all shipments.

For procurement teams requiring documentation, we can provide test reports, packing lists, and commercial invoices upon request. All units are shipped in anti-static packaging with appropriate labeling for customs clearance.

Contact our technical sales team to confirm stock availability, request a quotation, or discuss bulk procurement requirements for planned maintenance programs.

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