Siemens 39PSR4ANDN 16114-200/01 Retrofit Power Supply S5

Siemens 39PSR4ANDN 16114-200/01 Retrofit-Ready Power Supply for SIMATIC S5 Control Systems

The Siemens 39PSR4ANDN 16114-200/01 is a proven industrial power supply module engineered for seamless integration into legacy SIMATIC S5 control architectures. As production lines built on S5-115U, S5-135U, and S5-155U platforms approach end-of-life support cycles, the 39PSR4ANDN 16114-200/01 has become a critical retrofit component for engineers tasked with extending system uptime without committing to a full PLC migration. Its dimensional footprint, backplane connector pinout, and DC output ratings are fully compatible with the original S5 rack power slot, making it the preferred drop-in replacement for obsolete or failed units across a wide range of installed base configurations.

Procurement teams and maintenance engineers sourcing this module should verify the input voltage range (typically 85–264 V AC wide-range), the rated DC output capacity, and the backplane bus current allocation before installation. The 39PSR4ANDN 16114-200/01 supplies regulated 24 V DC and 5 V DC rails to the S5 central rack, supporting co-installed modules such as the 6ES5 095-8MA02 CPU, 6ES5 308-3UA11 digital input modules, and 6ES5 470-8MA12 analog output modules without requiring additional bus extenders in standard 18-slot rack configurations.

Every unit shipped by SMARTNEXMSK undergoes pre-delivery functional testing covering output voltage stability, overcurrent protection response, and inrush current behavior. Units are covered by a 12-month warranty from the date of shipment, with documented test records available upon request for quality-controlled procurement processes.

Upgrade Compatibility Table

Retrofit Planning for Existing Automation Systems

A successful retrofit centered on the 39PSR4ANDN 16114-200/01 begins with a thorough audit of the existing S5 rack assembly. Engineers should document the current slot population — including the 6ES5 095-8MA02 or 6ES5 100-8MA02 CPU module, any installed 6ES5 308-3UA11 or 6ES5 318-8MA12 digital I/O modules, and 6ES5 470-8MA12 analog output cards — and calculate the aggregate 5 V DC and 24 V DC bus current draw before selecting the replacement PSU rating.

Terminal wiring on the AC input side of the 39PSR4ANDN 16114-200/01 follows the standard S5 PSU terminal block layout. Maintenance teams should confirm that the incoming supply neutral, line, and protective earth connections match the original wiring diagram archived in the control cabinet documentation. Where cabinet documentation is unavailable, the terminal designations printed on the module faceplate serve as the authoritative reference.

For systems that include a 6ES5 374-1AA21 memory submodule or an S5-DOS programming interface, the CPU must be placed in STOP mode and the user program backed up to a PG 720 or PG 740 programming device — or to a modern PC running STEP 5 software — before the PSU is removed. This protects the RAM-resident program logic and prevents data loss during the power interruption caused by the module swap.

Where the existing system communicates via a CP 5431 FMS/DP communications processor or a CP 5511 PROFIBUS interface card, engineers should verify that the communication link is gracefully suspended before the PSU is powered down. Abrupt power loss during active PROFIBUS-DP polling cycles can trigger fault states in remote I/O stations and HMI panels connected to the network, requiring manual acknowledgment at each node before normal operation resumes.

In multi-rack configurations using a 6ES5 700-8MA11 expansion rack connected via a 6ES5 705-0AA00 rack coupler, the power supply in the central rack must be confirmed as the sole source for the backplane bus. Expansion racks carry their own PSU slots and are not affected by a central rack PSU swap, but the inter-rack communication cable should be inspected for continuity and connector seating before the system is returned to RUN mode.

Downtime Control During System Migration

Minimizing unplanned downtime during a SIMATIC S5 power supply replacement requires a structured pre-maintenance sequence. Before any physical intervention, the site engineer should capture a full program backup from the CPU using a STEP 5-compatible programming device, record all current I/O force table states, and photograph or document the existing terminal wiring on the PSU input block. These steps ensure that if any unexpected behavior occurs after the swap, the original configuration can be restored without relying on memory or incomplete documentation.

The physical replacement of the 39PSR4ANDN 16114-200/01 is a tool-free backplane extraction on most S5 rack variants — the module is secured by a front-panel locking lever and slides out on the rack guide rails. Replacement time for a prepared technician is typically under 15 minutes, making it feasible to execute during a scheduled production break rather than a full planned shutdown. After the new module is seated and the AC input is restored, the CPU should be observed through at least one full scan cycle in STOP mode before transitioning to RUN, confirming that all I/O modules are recognized and no hardware fault LEDs are active on the rack.

For facilities operating continuous processes where even brief interruptions carry significant cost, a cold-standby strategy — keeping a tested 39PSR4ANDN 16114-200/01 unit on the shelf alongside a current program backup — is the most effective downtime mitigation. SMARTNEXMSK maintains stock of this module to support rapid dispatch, with standard lead times of 3–7 business days for international shipments and same-week availability for domestic orders.

Retrofit Support FAQ

Q1: Is the 39PSR4ANDN 16114-200/01 a direct drop-in replacement for the original Siemens S5 power supply in my rack?
In the vast majority of S5-115U, S5-135U, and S5-155U rack configurations, yes. The module uses the standard S5 backplane power slot connector and requires no hardware modification. Before installation, confirm that the rated output current of the replacement unit meets or exceeds the aggregate bus current demand of all installed I/O and CPU modules in the rack.

Q2: Do I need to reprogram the CPU or reconfigure I/O addresses after replacing the power supply?
No. The 39PSR4ANDN 16114-200/01 is a passive power source on the backplane — it does not hold program logic, I/O configuration, or module address data. Provided the CPU retains its program (battery-backed RAM or EPROM submodule), all module addresses, I/O assignments, and communication parameters remain intact after the PSU swap. A STOP-to-RUN cycle is sufficient to resume normal operation.

Q3: How do I verify wiring compatibility before installation?
Compare the AC input terminal block layout on the 39PSR4ANDN 16114-200/01 faceplate against the existing wiring. The terminal designations (L1, N, PE) are standard across S5 PSU variants. If the original wiring was compliant with the previous module, it will be compatible with the replacement. Confirm that the incoming supply voltage matches the module’s rated input range before energizing.

Q4: What does the 12-month warranty cover, and what testing is performed before shipment?
Every 39PSR4ANDN 16114-200/01 unit shipped by SMARTNEXMSK is functionally tested prior to dispatch. Testing covers DC output voltage accuracy on both the 5 V and 24 V rails, overcurrent protection activation, and input-to-output isolation. The 12-month warranty covers manufacturing defects and functional failures under normal operating conditions. Units that fail within the warranty period are replaced or refunded; test documentation is available upon request for quality-assurance records.

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