Why the TSXP573634M Still Earns Its Place on the Backplane
Downtime on a Modicon Premium line rarely waits for a budget cycle. When a processor fails, every hour of lost output costs far more than the module itself. The TSXP573634M from Schneider Electric gives maintenance teams a proven Unity processor that drops straight into existing Premium racks, so you restore production without re-engineering the cabinet.
This CPU belongs to the Modicon Premium family. It runs a PowerPC-based Unity processor at 66 MHz with an integrated math coprocessor, 2048 KB of program memory, and 192 KB of data memory. For plants still running Premium architecture, that combination keeps logic execution predictable and spare-part planning simple.
Key Parameters That Drive Real Cost Savings
Processing Speed and Scan Time
The 66 MHz PowerPC core with integrated FPU executes a boolean instruction in 0.12 to 0.17 µs, depending on whether a PCMCIA card is fitted. Faster scan cycles mean tighter control loops and less scrap on high-speed packaging or mixing lines. The integrated math coprocessor handles floating-point work without a separate module, which removes one more spare part from your inventory budget.
Memory Headroom
With 2048 KB of program memory and 192 KB of data memory, the TSXP573634M absorbs large sequential logic and recipe handling without forcing an early upgrade. That memory headroom protects your capital plan: you extend the service life of the existing Premium platform instead of funding a full controller replacement mid-project.
I/O Capacity
The processor supports up to 1024 discrete I/O points and 128 analog I/O points. It fits 4, 6, 8, and 12-slot backplanes, and drives up to 16 local racks in 4/6/8-slot configurations or 8 local racks in 12-slot configurations. Expansion racks are not available, so size the local rack layout at design stage. Getting that count right the first time avoids costly rework later.
Electrical Load
The module draws 5 V DC from the backplane, consumes 5.6 W, and pulls 1650 mA bus current. These figures matter when you calculate power budget across a loaded rack. An accurate budget prevents nuisance faults and protects the upstream supply.
Communication Without Extra Hardware
Two built-in communication paths reduce integration cost. One Ethernet 10/100 RJ45 port supports Modbus TCP/IP, and two RS-485 serial ports support Modbus RTU. You connect to SCADA, HMIs, and drives without buying a dedicated gateway. When the application needs more, the Premium backplane accepts communication modules for Fipio, Fipway, Modbus Plus, Ethernet, and PROFIBUS DP.
Where This Processor Fits Best
Continuous Process Lines
A food processing plant running Modbus TCP/IP to a supervisory system benefits from the Ethernet port and the 128-point analog capacity. Temperature and pressure loops stay on one CPU, which lowers hardware count and cabinet wiring cost.
Discrete Manufacturing Cells
An automotive sub-assembly cell with roughly 800 discrete points fits comfortably inside the 1024-point ceiling. The 0.12 µs scan speed keeps pneumatic sequencing tight, and the 2 MB program memory holds the full station logic without splitting across controllers.
Legacy Premium Retrofits
When a plant already owns Premium racks, this processor is the lowest-cost path back to full production. It reuses existing I/O, wiring, and backplane hardware. That avoids the capital expense of a parallel control system.
Installation and Setup Notes
Mount the module in a compatible Premium backplane slot and confirm the 5 V DC bus budget before power-up. Program the unit with Unity Pro or EcoStruxure Control Expert. Verify the firmware revision matches your existing project before you download logic. Keep the enclosure at IP20 protection level, meaning it belongs inside a clean cabinet free from dust and moisture ingress. Follow Schneider Electric’s installation manual for torque and grounding practice.
Maintenance and Lifecycle Planning
Inspect the module periodically for secure seating, clean ventilation, and stable backplane voltage. Because the unit is discontinued, treat every installed processor as a critical spare. Stock one verified unit on the shelf. That single spare can cut a multi-day lead-time risk down to a same-day swap, which is the cheapest insurance a maintenance budget can buy.
Schneider Electric lists the Modicon M580 (BMEP58xxx) as the replacement path. Plan that migration during a scheduled outage rather than an unplanned failure. Keep the Premium line running in the meantime with verified spare stock.
Compatibility Checklist Before You Buy
Confirm your backplane slot count, your total discrete and analog point count, and your communication protocol needs. Check that your programming software version supports the Unity processor. If you run PROFIBUS DP or Fipway devices, confirm the correct Premium communication module is already installed.
SpareTechPLC supplies tested industrial automation parts with clear documentation. Verify current lifecycle status and availability with SpareTechPLC before ordering, since this model is discontinued.
Frequently Asked Questions
Is the TSXP573634M still in production?
No. Schneider Electric has discontinued this processor and points customers to the Modicon M580 (BMEP58xxx) as the replacement. Verify availability with SpareTechPLC before ordering.
Can I reuse my existing Premium I/O modules?
Yes, provided your racks are 4, 6, 8, or 12-slot backplanes. The processor supports up to 1024 discrete and 128 analog points across local racks.
Which software programs this processor?
Use Unity Pro or EcoStruxure Control Expert. Confirm your project file matches the processor firmware before downloading.
Does it support Ethernet communication natively?
Yes. One built-in Ethernet 10/100 RJ45 port supports Modbus TCP/IP, and two RS-485 ports support Modbus RTU.
What is the power draw?
The module draws 5 V DC from the backplane, consumes 5.6 W, and pulls 1650 mA bus current. Check your rack power budget before installation.
