Schneider TSXP67455 TSX6740 Replacement for TSX Premium 57

Product Overview

Schneider TSXP67455 TSX6740 Replacement for TSX Premium 57: Smooth Migration from Legacy CPU to Modern Control

Migrating an aging Schneider Electric TSX Premium 57 control system to a reliable, fully compatible replacement CPU is one of the most critical decisions a plant engineer faces. The TSXP67455 (TSX6740) CPU module is a high-performance processor designed for the TSX Premium 57 rack platform, and sourcing a verified replacement unit is essential to minimizing unplanned downtime, preserving existing wiring infrastructure, and avoiding costly reprogramming of proven control logic.

At TOPNLMS, we specialize in supplying tested, ready-to-ship industrial automation components for exactly this scenario — whether you are replacing a failed unit, building a spare-parts inventory, or executing a planned system upgrade from an end-of-life Schneider platform.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful TSXP67455 migration rarely involves the CPU alone. In most retrofit projects, the CPU replacement is coordinated with a broader review of the rack and peripheral modules to ensure the entire control system operates reliably after the changeover.

For sites running the TSX Premium 57 platform, the TSXRKY8 or TSXRKY12 backplane rack typically hosts the CPU alongside discrete and analog I/O modules such as the TSXDEY16D2 (16-channel 24VDC digital input) and TSXAEY414 (4-channel analog input). These modules retain full compatibility with the TSXP67455 and require no hardware changes during the CPU swap.

Communication continuity is a key concern during any migration. The TSXP67455 supports the Uni-Telway serial bus natively, allowing existing field devices — including drives, HMIs, and remote I/O drops connected via TSXSCA62 or TSXSCA50 communication adapters — to remain online without protocol reconfiguration. Sites using Modbus RTU over RS-485 can continue using the same wiring and slave device addresses.

For engineers who need to upload or compare the existing PLC program before the swap, the TSXPCX1031 programming cable (USB to Uni-Telway) provides a direct connection to the legacy CPU for a full project backup using Unity Pro or PL7 Pro. This step is strongly recommended before any CPU replacement to preserve the validated control logic.

Power supply integrity should also be verified during the migration window. The TSXPSY2600M (26W) and TSXPSY5500M (55W) rack power supplies are fully compatible with the TSXP67455 and do not require replacement unless they show signs of aging or voltage instability. Replacing the power supply at the same time as the CPU is a common best practice to extend the maintenance-free interval.

For systems that include operator interface panels, the XBTGT2330 or XBTGT4330 Magelis HMI terminals connected via Uni-Telway or Ethernet will continue to communicate with the TSXP67455 without driver changes, provided the IP address or station address is preserved during the CPU swap procedure.

Sites with distributed I/O architectures using TSXETY110 or TSXETY410 Ethernet communication modules on remote racks will find that the TSXP67455’s integrated Ethernet port simplifies the network topology, potentially eliminating the need for a dedicated communication module in the main rack and freeing a slot for additional I/O expansion.

Signal isolation requirements between the PLC and field instrumentation can be addressed with DIN-rail-mounted signal isolators and terminal blocks, which integrate cleanly into the existing control cabinet without requiring changes to the rack wiring harness.

Retrofit Guidance FAQ

Q: Can I replace the TSXP67400 or TSXP67200 directly with the TSXP67455 without rewiring?
A: Yes. The TSXP67455 occupies the same CPU slot in the TSX Premium 57 rack. All I/O module wiring, power supply connections, and field cable terminations remain unchanged. Only the CPU module is physically swapped.

Q: Do I need to modify my Unity Pro or PL7 Pro project after the replacement?
A: In most cases, no. The existing project can be downloaded directly to the TSXP67455. If the original project was developed on PL7 Pro, it is advisable to convert it to Unity Pro format for long-term maintainability, but this is not required for immediate operation.

Q: Will my Uni-Telway and Modbus devices continue to communicate after the swap?
A: Yes. The TSXP67455 supports both Uni-Telway (on the terminal port) and Modbus RTU/TCP. Existing slave addresses, baud rates, and parity settings are preserved in the downloaded project and do not need to be reconfigured on field devices.

Q: How much physical space does the TSXP67455 require in the control cabinet?
A: The TSXP67455 is a standard TSX Premium 57 CPU module and occupies a single CPU slot in the rack. No additional DIN rail space or cabinet modifications are required.

Q: What is the recommended procedure for a live system cutover?
A: (1) Back up the existing project via TSXPCX1031 cable. (2) Power down the rack. (3) Remove the legacy CPU. (4) Insert the TSXP67455. (5) Power up and download the project. (6) Verify I/O status and communication links before resuming production. Total cutover time is typically under 30 minutes for a prepared team.

Q: Is the TSXP67455 compatible with PROFIBUS or CANopen field networks?
A: The TSXP67455 supports Uni-Telway, Modbus, and Ethernet natively. PROFIBUS-DP or CANopen connectivity requires a dedicated communication module (e.g., TSXPBY100 or TSXCBY100) installed in the rack, which is unchanged by the CPU replacement.

Warranty Assurance

Every TSXP67455 TSX6740 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to shipment, each unit undergoes a functional power-on test and visual inspection to verify physical integrity, connector condition, and basic operational status.

If a unit develops a fault within the warranty period, TOPNLMS will arrange a replacement or repair at no additional cost to the buyer. Our after-sales response target is within 24 business hours of a warranty claim submission. Buyers are encouraged to retain the original packaging and test documentation provided with each shipment to facilitate any warranty process.

We maintain stock of TSXP67455 and related TSX Premium 57 components to support rapid dispatch. Standard lead time for in-stock units is 3–7 business days to most international destinations, with express shipping options available for urgent replacement scenarios.

For volume procurement, spare-parts inventory programs, or project-based supply agreements, please contact our industrial sales team directly to discuss pricing, lead times, and technical support arrangements.