Siemens 39PSR4ANDN Replacement for SIMATIC S5 Series

Product Overview

Siemens 39PSR4ANDN Replacement for SIMATIC S5 Series: Smooth Transition & Legacy System Upgrade

The Siemens 39PSR4ANDN (part number 16114-200/01) is a dedicated industrial power supply unit originally designed for use within the SIMATIC S5 programmable controller platform. As Siemens has progressively phased out the S5 product line in favor of the SIMATIC S7-300 and S7-400 families, many facilities operating legacy S5-115U, S5-135U, and S5-155U systems are now facing the critical challenge of sourcing reliable replacement power supply modules to sustain production continuity without committing to a full system overhaul.

TOPNLMS maintains verified stock of the 39PSR4ANDN 16114-200/01, fully tested prior to shipment, enabling your engineering team to execute a direct drop-in replacement with zero modifications to the existing control cabinet wiring or rack configuration. The module slots directly into the original S5 central controller rack, preserving the existing backplane bus connections and maintaining compatibility with all installed I/O modules, including digital input cards, analog output modules, and communication processors already in service.

Compatibility Comparison Table

Seamless Upgrade Solutions

When replacing the 39PSR4ANDN in an active SIMATIC S5 installation, the power supply module rarely operates in isolation. In most S5-135U and S5-155U control cabinets, the PSU works in conjunction with a range of co-installed components that may also require attention during the retrofit process.

Many sites running the S5-155U central processing unit alongside the 39PSR4ANDN have found that the CPU module itself — such as the 6ES5 955-3LC41 or 6ES5 948-3UA23 — remains serviceable but benefits from a simultaneous inspection of the power rail integrity. In parallel, digital input modules like the 6ES5 431-8MA11 and analog output cards such as the 6ES5 470-8MA12 should be verified for proper bus voltage levels after the PSU swap, as marginal supply voltage can cause intermittent I/O faults that are difficult to diagnose without a known-good power source.

For facilities that have already begun a phased migration toward the SIMATIC S7-300 platform, the 39PSR4ANDN replacement can serve as a bridge solution, keeping the S5 rack operational while S7-300 racks — powered by the PS 307 power supply family — are commissioned in parallel. Communication between legacy S5 segments and new S7-300 controllers is typically handled through an S5-compatible communication processor or an ET 200M distributed I/O station acting as a protocol gateway, allowing engineers to migrate I/O points progressively without a full cutover.

In control cabinets where DIN rail space is shared between the S5 rack and auxiliary 24 VDC SITOP power supplies for field devices, replacing the 39PSR4ANDN is an opportunity to audit the entire cabinet power architecture. SITOP PSU100S and SITOP smart series units are commonly found alongside S5 racks and should be checked for output voltage stability during the commissioning phase following the PSU replacement.

For sites using PROFIBUS DP as the field communication backbone — connecting the S5 controller to remote I/O stations, variable frequency drives, or operator panels — no changes to the PROFIBUS network configuration are required when replacing the power supply. The 39PSR4ANDN is a non-communicating module and its replacement has no impact on PROFIBUS segment addressing, baud rate settings, or DP slave configurations.

Retrofit Guidance FAQ

Q: Do I need to modify any wiring when replacing the 39PSR4ANDN?
A: No. The replacement unit uses the same terminal block layout and connector positions as the original. All existing AC input wiring and cabinet grounding connections are retained without modification.

Q: Will replacing the power supply affect my S5 program or CPU memory?
A: No. The CPU retains its program in battery-backed RAM or EPROM during the power supply swap. Ensure the CPU backup battery is in good condition before performing the replacement to prevent memory loss during the brief power interruption.

Q: Is this unit compatible with both S5-135U and S5-155U racks?
A: Yes. The 39PSR4ANDN is designed for use in the SIMATIC S5 universal rack (UR) configuration used across the S5-115U, S5-135U, and S5-155U systems. Physical slot dimensions and backplane bus connectors are identical across these platforms.

Q: Can I use this PSU in a system that also has a redundant power supply configuration?
A: The 39PSR4ANDN is a single-slot power supply. If your installation uses a redundant PSU arrangement, both units should be of the same type. TOPNLMS can supply matched pairs upon request.

Q: What communication protocols are affected by this replacement?
A: None. The 39PSR4ANDN is a power supply module only and has no role in PROFIBUS, MPI, or Industrial Ethernet communication. All network configurations remain unchanged after replacement.

Q: How long does commissioning take after the swap?
A: For a direct replacement with no wiring changes, commissioning typically takes 15–30 minutes, including power-on verification, I/O status check, and confirmation of CPU operating mode. No programming tools or STEP 5 software interaction is required unless a CPU restart is needed.

Warranty Assurance

Every 39PSR4ANDN 16114-200/01 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to shipment, each module undergoes functional testing including input voltage acceptance, output voltage regulation verification, and thermal stability checks under load conditions representative of a standard S5 rack configuration.

In the event of a confirmed defect within the warranty period, TOPNLMS provides direct replacement support with priority processing. Our after-sales response target is within 24 hours of a warranty claim submission. Replacement units are dispatched from our Xiamen warehouse, with express shipping options available to minimize production downtime for urgent cases.

All units are shipped with anti-static packaging, individual serial number documentation, and a pre-shipment inspection report available upon request. For procurement teams requiring formal quality documentation, certificates of conformity and test records can be provided as part of the order package.

TOPNLMS specializes in legacy industrial automation components and maintains ongoing stock of discontinued Siemens SIMATIC S5 modules to support long-term maintenance contracts and emergency replacement requirements across manufacturing, utilities, and process industries.