Siemens 6EP1336-3BA00 Replacement for SITOP Modular

Product Overview

Siemens 6EP1336-3BA00 Replacement for SITOP Modular: Smooth Transition from Legacy Power Supply Systems

The Siemens 6EP1336-3BA00 is a SITOP Modular series 24 VDC / 10 A DIN rail power supply widely deployed across industrial control panels, PLC cabinets, and distributed I/O enclosures. As production lines age and original units reach end-of-service life, sourcing a verified, wiring-compatible replacement becomes a critical procurement priority. This listing provides a direct upgrade solution for facilities migrating away from legacy SITOP Modular units — including discontinued predecessors such as the 6EP1336-1SH01 and 6EP1336-2BA00 — without requiring panel redesign, rewiring, or PLC program modification.

The 6EP1336-3BA00 accepts a wide AC input range (85–264 VAC, 47–63 Hz), making it suitable for both 110 VAC and 230 VAC supply environments. Its 24 VDC / 10 A output is fully compatible with Siemens S7-300, S7-400, and ET 200 distributed I/O systems, as well as third-party PLCs and field devices that share the same 24 VDC bus. The unit mounts on standard 35 mm DIN rail and occupies a 70 mm panel width — identical to the original footprint — so no mechanical modification to the control cabinet is required during the swap.

When upgrading from an older SITOP Compact or SITOP Standard unit, engineers frequently need to verify terminal block compatibility. The 6EP1336-3BA00 uses screw-type terminals with the same pitch and wire gauge acceptance (up to 4 mm²) as its predecessors, allowing existing field wiring to be reconnected directly. The DC output terminals are clearly labeled and maintain polarity convention consistent with earlier SITOP Modular variants, reducing the risk of miswiring during hot-swap maintenance windows.

Compatibility Comparison Table

Seamless Upgrade Solutions

A complete power supply migration rarely involves a single component. In practice, upgrading from a legacy SITOP Modular unit to the 6EP1336-3BA00 often coincides with broader control cabinet modernization. Facilities running Siemens S7-300 CPUs — such as the CPU 315-2 DP or CPU 317-2 PN/DP — on aging backplanes frequently replace the power supply at the same time as refreshing the SM 321 digital input modules or SM 331 analog input modules that share the same 24 VDC rail. The 6EP1336-3BA00 provides sufficient headroom to power multiple I/O modules simultaneously without derating.

For sites operating redundant power architectures, the SITOP Modular redundancy module 6EP1961-2BA11 connects directly to two 6EP1336-3BA00 units in a 1+1 configuration, enabling seamless failover without interrupting the 24 VDC bus. This is particularly relevant for continuous-process industries where unplanned downtime carries significant cost.

Communication-intensive panels that include CP 343-1 Ethernet communication processors or CP 341 serial communication modules also benefit from a stable, low-ripple 24 VDC supply. The 6EP1336-3BA00’s output ripple specification (less than 50 mV peak-to-peak) meets the supply quality requirements for these modules. Similarly, IM 153-2 interface modules used in ET 200M distributed I/O stations are fully compatible with this power supply’s output characteristics.

Where cabinet space is constrained and engineers are consolidating legacy SITOP Standard 6EP1336-3BA00 units alongside newer Siemens LOGO! 24 logic modules or third-party HMI panels drawing from the same 24 VDC bus, the unit’s built-in current limiting and overload protection prevent cascading failures across shared loads. For installations requiring signal isolation between the power supply output and sensitive analog field devices, a DIN rail signal isolator (e.g., Phoenix Contact MINI MCR series or equivalent) is recommended as a companion component.

Retrofit Guidance FAQ

Q: Can I reconnect existing field wiring directly to the 6EP1336-3BA00 terminals?
A: Yes. The terminal pitch and wire gauge acceptance (up to 4 mm²) are identical to earlier SITOP Modular variants. No ferrule changes are required for standard installations.

Q: Will my S7-300 PLC program require modification after replacing the power supply?
A: No. The power supply is transparent to the PLC program. As long as the 24 VDC output voltage and current capacity are maintained, the CPU, I/O modules, and communication processors will continue operating without any software changes.

Q: Is the 6EP1336-3BA00 compatible with PROFIBUS DP or PROFINET communication modules in the same cabinet?
A: Yes. Both PROFIBUS DP (e.g., CP 342-5) and PROFINET (e.g., CP 343-1 Advanced) modules draw from the 24 VDC backplane supply. The 6EP1336-3BA00 meets the supply voltage tolerance and ripple requirements for both communication standards.

Q: What is the physical installation clearance requirement?
A: Siemens recommends a minimum 25 mm clearance above and below the unit for convection cooling. The 70 mm panel width is unchanged from legacy SITOP Modular units, so existing DIN rail slot allocation is preserved.

Q: Can this unit replace a 6EP1336-2BA00 in a redundant power supply configuration?
A: Yes, provided the 6EP1961-2BA11 redundancy module is also present. Both units in the redundant pair must be the same model for correct load sharing.

Warranty Assurance

Every 6EP1336-3BA00 unit shipped from TOPNLMS undergoes pre-shipment functional verification, including output voltage accuracy check, load regulation test, and DC OK signal confirmation. Units are dispatched with a 12-month warranty from the date of shipment, covering manufacturing defects and functional failures under normal operating conditions.

If a unit fails within the warranty period, TOPNLMS provides a replacement dispatch within 3 business days of fault confirmation, subject to return of the defective unit. Our after-sales team responds to technical inquiries within 24 hours on business days. Procurement teams requiring batch testing reports, factory certificates, or customs documentation for import clearance should contact us prior to order placement.

Stock is maintained in Xiamen, China, with standard export packaging suitable for air freight and sea freight. Lead time for in-stock units is 1–3 business days to dispatch. For urgent replacement requirements, expedited shipping options are available on request.