Siemens 6EP1336-3BA10 Replacement for SITOP PSU100M

Product Overview

Siemens 6EP1336-3BA10 Replacement for SITOP PSU100M: Seamless Upgrade & System Migration

The Siemens 6EP1336-3BA10 is a SITOP PSU100M series stabilized power supply module rated at 24 VDC / 10 A output, designed for demanding industrial control environments. As legacy SITOP PSU100S and earlier PSU100 variants reach end-of-life or become increasingly difficult to source, the 6EP1336-3BA10 serves as the primary drop-in replacement and upgrade path for engineers modernizing their control cabinets, PLC racks, and distributed I/O panels.

This unit is engineered for direct DIN rail mounting and delivers a regulated 24 VDC output compatible with the full range of Siemens S7-300 and S7-400 PLC backplanes, ET 200M distributed I/O stations, and SIMATIC HMI panels. Its wide-range AC input (85–264 VAC) eliminates the need for input voltage reconfiguration when migrating from older single-range power supplies, significantly reducing retrofit labor and commissioning time.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful power supply migration rarely involves a single component. When replacing an aging SITOP PSU100S or PSU100 unit with the 6EP1336-3BA10, engineers typically review the entire 24 VDC distribution architecture within the control cabinet. In S7-300 systems, the CPU 315-2 DP or CPU 317-2 PN/DP draws its logic power from the same 24 VDC rail, making stable, regulated output from the PSU100M critical for uninterrupted PLC operation.

For cabinets running ET 200M distributed I/O, the IM 153-2 interface module and associated SM 321 digital input modules or SM 331 analog input modules all depend on a clean 24 VDC supply. Replacing a degraded or end-of-life power supply with the 6EP1336-3BA10 directly improves signal integrity across these I/O modules, reducing spurious faults and nuisance trips during production.

In larger installations where redundant power is required, the SITOP UPS1600 uninterruptible power supply can be paired with the 6EP1336-3BA10 to provide buffered DC output during mains interruptions. The PSU100M’s DC OK relay output integrates cleanly with the UPS1600’s monitoring input, enabling automatic switchover without PLC program changes.

For systems that include PROFIBUS DP communication — common in S7-300 and S7-400 architectures — the CP 342-5 PROFIBUS communication processor and DP/PA coupler modules also rely on the 24 VDC rail. Ensuring the replacement power supply meets the full load demand of these communication modules is a key step in the migration checklist. The 6EP1336-3BA10’s 10 A output comfortably supports mixed racks containing CPU, communication, and I/O modules simultaneously.

Where the control cabinet also houses a SIMATIC TP700 or TP900 HMI panel, the 24 VDC supply from the PSU100M feeds the panel’s power input directly. The stable output voltage and low ripple of the 6EP1336-3BA10 are particularly important for HMI longevity and display reliability. Engineers migrating from older SITOP units frequently report improved HMI stability after upgrading to the PSU100M series.

In retrofit projects involving older Siemens S5-series control systems being migrated to S7-300 or S7-1500 platforms, the 6EP1336-3BA10 is often specified alongside the IM 360/361 expansion rack interface modules and SM 374 I/O simulation modules used during parallel-run commissioning. The wide AC input range of the PSU100M simplifies integration into legacy panel wiring that may not have been updated to modern voltage standards.

For installations requiring terminal block distribution of the 24 VDC bus, the SITOP PSU100M pairs naturally with Siemens SIRIUS 3RV circuit breakers and 8WH DIN rail terminal blocks, which provide per-circuit overcurrent protection and organized wiring without requiring additional panel space.

Retrofit Guidance FAQ

Q: Can I replace my existing SITOP PSU100S 10 A unit with the 6EP1336-3BA10 without rewiring?
A: Yes. The 6EP1336-3BA10 uses the same 35 mm DIN rail mounting, identical 70 mm cabinet width, and the same screw terminal layout as the PSU100S 10 A variant. Output wiring connects directly to the existing 24 VDC distribution terminals. No rewiring is required for standard installations.

Q: Does the 6EP1336-3BA10 require any PLC program changes after installation?
A: No program changes are required. The PSU100M is a standalone power supply with no data interface to the PLC CPU. The DC OK relay output can optionally be wired to a digital input on an SM 321 module for power fault monitoring, but this is not mandatory for basic operation.

Q: Is the wide-range AC input compatible with my existing panel wiring?
A: Yes. The 6EP1336-3BA10 accepts 85–264 VAC at 47–63 Hz without any manual switching. If your existing panel is wired for 110 VAC or 230 VAC, the PSU100M will operate correctly on either voltage without modification.

Q: Can this unit be used in parallel with another PSU100M for redundancy?
A: Yes. Two 6EP1336-3BA10 units can be connected in parallel for load sharing or N+1 redundancy. No additional hardware is required; the units balance current sharing automatically. This is a common upgrade path for critical process control applications where power supply failure would cause unacceptable downtime.

Q: What is the physical installation space required?
A: The 6EP1336-3BA10 occupies 70 mm of DIN rail width and requires approximately 150 mm of vertical clearance for ventilation. It is a direct physical replacement for the PSU100S 10 A unit and fits in the same cabinet slot without panel modification.

Q: Is the 6EP1336-3BA10 compatible with PROFIBUS and PROFINET communication modules?
A: Yes. As a 24 VDC power supply, it provides the supply voltage for all PROFIBUS DP and PROFINET IO modules in the rack. It has no direct protocol interface but powers CP 343-1, CP 342-5, and similar communication processors without issue.

Q: How do I verify the replacement unit is functioning correctly after installation?
A: The PSU100M provides a green LED for DC OK status and a relay output signal. After installation, verify the output voltage at the terminal block (should read 24.0–24.5 VDC under load), confirm the DC OK LED is illuminated, and check that all connected PLC modules and I/O stations have powered up normally. No special commissioning tools are required.

Warranty Assurance

Every Siemens 6EP1336-3BA10 unit shipped by TOPNLMS is covered by a 12-Month Warranty from the date of delivery. Prior to shipment, each unit undergoes functional testing including output voltage verification, load regulation testing, and DC OK signal output confirmation. Units that do not meet Siemens factory specifications are not shipped.

In the event of a warranty claim, TOPNLMS provides replacement unit dispatch within 3 business days of fault confirmation. Our technical support team is available to assist with installation verification, wiring queries, and compatibility confirmation before and after purchase. We maintain stock of the 6EP1336-3BA10 and related SITOP PSU100M series modules to support rapid fulfillment for both single-unit replacement orders and bulk procurement for maintenance inventory programs.

Orders are processed and shipped from Xiamen, China, with DHL Express, FedEx International Priority, and UPS Worldwide Expedited available as shipping options. Export documentation including commercial invoice, packing list, and certificate of origin is provided with every shipment to facilitate customs clearance in all major markets.

For procurement inquiries, bulk pricing, or technical pre-sales support, contact our team directly:

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