Toshiba CPUX01-01 TOSMAP-EV Controller

Key Technical Specifications

A historical import record provides particularly useful identification: CPUX01-01 = 6S2K2020-2, described as a central processing PCB and TOSMAP-EV controller for a thermal-power-plant DCS. The same record distinguishes CPUX02-01 as 6S2K2020-3, a TOSMAP-EV master controller for DEHC, so these part numbers should not be treated as interchangeable.

Some current secondary listings describe CPUX01-01 as a Toshiba TOSMAP turbine-control CPU and provide additional interface and environmental figures, but those details are not corroborated by an accessible Toshiba primary datasheet. For a safety-critical turbine replacement, I would treat those figures as unverified until the OEM manual or the installed board’s nameplate confirms them.

Product Introduction

The Toshiba CPUX01-01 is a TOSMAP-EV central processing PCB associated with part number 6S2K2020-2. Trade documentation identifies it specifically as the controller for a distributed control system used in thermal power plants. It belongs to a legacy Toshiba turbine-control architecture rather than a conventional current-generation PLC platform.

This distinction matters during replacement. CPUX01-01 should be matched by exact part number, board revision, TOSMAP system configuration, and firmware. Do not substitute CPUX02-01 simply because both boards belong to TOSMAP-EV; available records assign CPUX02-01 a different DEHC master-controller function.

CPUX01-01

CPUX01-01

Installation & Configuration Guide

Stage 1: Pre-Installation Preparation — Approximately 10 Minutes

⚠️ Safety First: A turbine-control CPU is part of a process-control system where an incorrect replacement can affect turbine operation. Obtain operations approval, place the turbine/control system in the prescribed safe state, and follow the plant’s LOTO and turbine-control maintenance procedure.

Tools Required

• ESD wrist strap
• PH1/PH2 screwdriver as applicable
• Digital multimeter
• Wire and slot labels
• Smartphone or camera for configuration records
• OEM TOSMAP engineering/maintenance documentation

Data Backup

1. Record the complete CPUX01-01 nameplate and board revision.
2. Photograph the front panel, LEDs, connectors, and rack position.
3. Record the installed firmware revision if the engineering software exposes it.
4. Save the current TOSMAP control configuration.
5. Record rack slot location and any redundant-controller arrangement.
6. Photograph every jumper, switch, and connector before removal.

⚠️ Do not begin with a generic PLC replacement procedure. is associated with a Toshiba TOSMAP turbine-control system, so the existing system configuration is more important than the physical similarity of another CPU board.

Stage 2: Removing the Old Module — Approximately 5 Minutes

1. Confirm the turbine/control system has reached the approved maintenance state.
2. Confirm the appropriate controller is isolated according to the TOSMAP maintenance procedure.
3. Apply ESD protection.
4. Photograph the installed CPU one final time.
5. Release the board’s mechanical retention mechanism.
6. Pull the CPU straight out of the rack.
7. Do not twist the PCB against the backplane connector.
8. Inspect the backplane connector for contamination, bent contacts, or mechanical damage.
9. Place the removed CPU in an ESD-safe package.

⚠️ Keep the original until the replacement has passed diagnostics and the control system has been formally accepted by operations.

Stage 3: Installing the New Module — Approximately 5 Minutes

1. Verify the replacement label reads .
2. Verify the associated part number where marked, including 6S2K2020-2 if present.
3. Compare board revision and physical construction with the removed CPU.
4. Verify the replacement is intended for the same TOSMAP-EV configuration.
5. Inspect the rack connector.
6. Align the PCB with the rack guides.
7. Insert the board straight into the correct CPU position.
8. Secure the board using the original retention mechanism.
9. Verify that no connector or board edge remains partially seated.

Self-Checklist

• confirmed
• 6S2K2020-2 identification checked
• Board revision recorded
• TOSMAP-EV configuration verified
• Firmware revision checked
• Rack slot confirmed
• Board fully seated
• Retention mechanism secured

Stage 4: Power-On & Testing — Approximately 10–20 Minutes

1. Complete a visual inspection before energizing.
2. Verify rack power according to the Toshiba TOSMAP maintenance procedure.
3. Power the controller/rack in the prescribed sequence.
4. Observe CPU status LEDs during startup.
5. Connect the approved TOSMAP engineering/diagnostic environment.
6. Confirm that the CPU is correctly identified by the system.
7. Verify the firmware revision against the archived configuration.
8. Restore configuration only if required by the replacement procedure.
9. Confirm communication with the associated TOSMAP I/O and control functions.
10. Perform a controlled functional test before returning the turbine system to normal service.

⚠️ Do not download an old or new control program merely to clear a diagnostic indication. First establish whether the replacement CPU contains the expected configuration and firmware.

Technical Pitfalls to Check Before Commissioning

1. Firmware Revision Mismatch

❗ Legacy turbine controllers are particularly sensitive to configuration and firmware compatibility. Record the original CPU firmware before removing the board. If the replacement revision differs, verify compatibility with the installed TOSMAP-EV software before commissioning.

2. vs. CPUX02-01

This is not a cosmetic distinction. Historical equipment records identify as the TOSMAP-EV DCS controller, while CPUX02-01 / 6S2K2020-3 is identified as a TOSMAP-EV master controller for DEHC.

3. Configuration Retention

Do not assume the replacement CPU contains the plant’s application configuration. Determine where the active TOSMAP configuration is stored and how the OEM procedure handles CPU replacement before removing the original.

4. Backplane Compatibility

A board that physically fits a legacy rack is not necessarily functionally compatible. Verify the rack type, slot assignment, board revision, and associated TOSMAP modules.

5. ESD

❗ Use a grounded wrist strap and ESD-safe work surface. Legacy CPU boards can contain components that are difficult or expensive to replace.

Frequently Asked Questions (FAQ)

What is the Toshiba ?

It is a TOSMAP-EV central processing PCB used in Toshiba turbine-control systems. Historical import documentation identifies as 6S2K2020-2 and describes it as a TOSMAP-EV controller for a thermal-power-plant distributed control system.

Is a standard Toshiba PLC CPU?

Not in the sense of a current-generation general-purpose PLC CPU such as a Toshiba programmable-controller CPU. Available documentation identifies this part specifically with the TOSMAP-EV turbine/DCS architecture. Treat it as a system-specific turbine-control processor rather than a generic PLC replacement.

Is the same as CPUX02-01?

No. Available historical records associate with 6S2K2020-2 and the TOSMAP-EV DCS controller, while is 6S2K2020-3 and is described as a TOSMAP-EV master controller for DEHC.

Can I hot-swap the ?

Do not assume that it can be hot-swapped. I could not verify an authoritative Toshiba hot-swap specification for this exact board. Follow the plant’s TOSMAP maintenance procedure and the applicable turbine-control architecture before removing the CPU.

Will replacing erase the turbine control program?

That depends on the TOSMAP system architecture and how the particular installation stores its application configuration. Back up the existing configuration before replacement and establish the restoration procedure before removing the old CPU.

Is the obsolete?

It is clearly associated with a legacy TOSMAP platform, and current availability is primarily through industrial spare-parts channels rather than a current mainstream PLC distribution network. I could not verify a current Toshiba lifecycle bulletin for , so I would not assign a formal EOL date without OEM documentation.

What condition should I specify when purchasing ?

For a turbine-control spare, specify the exact condition explicitly: Factory Sealed, New Original/New Surplus, or Refurbished and Tested. Also request photographs of the actual nameplate, board revision, and packaging. Because is a legacy controller, board revision and configuration details can matter as much as the basic model number.

Procurement note: Current secondary-market listings identify Toshiba as the manufacturer and as a turbine-control CPU, while historical trade data provides the stronger part-number relationship to 6S2K2020-2 / TOSMAP-EV. Treat third-party claims about processor architecture, memory size, Ethernet interfaces, temperature range, and control-cycle timing as unverified unless they can be matched to Toshiba documentation.