ABB TK801V006 Replacement Cable for AC500 S500

Product Overview

ABB TK801V006 Replacement Cable for AC500 S500: Seamless I/O Bus Upgrade & Migration

The ABB TK801V006 (catalog reference 3BSC950089R2) is a ModuleBus Extension Cable engineered for the ABB AC500 PLC platform and its associated S500 distributed I/O system. As legacy control architectures age and original cables reach end-of-life, sourcing a verified, compatible replacement becomes a critical path item for any retrofit or modernization project. TOPNLMS maintains ready stock of the TK801V006 to support engineers who need to minimize unplanned downtime and keep production lines running without costly re-engineering.

Whether you are replacing a worn or damaged cable in an existing AC500 installation, migrating from an older ABB Advant Controller 31 or S100 I/O architecture to the current AC500 generation, or simply building a spare-parts inventory for a critical machine, the TK801V006 provides a direct, plug-and-play solution. The cable maintains the ModuleBus protocol integrity required for deterministic communication between the AC500 CPU modules — such as the PM571, PM581, PM591, or PM595 — and remote S500 I/O stations mounted in separate cabinets or field enclosures.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful AC500 migration or I/O bus retrofit rarely involves a single component. In practice, engineers replacing the TK801V006 cable are often simultaneously commissioning or verifying adjacent hardware. The S500 I/O terminal units — including digital input modules such as the DI581-S and digital output modules such as the DO581-S — connect directly to the ModuleBus network that this cable extends, and their wiring terminals must be inspected for compatibility with the new cable routing. Similarly, the TA521 and TA526 terminal adapter units used to mount S500 modules on DIN rail should be confirmed as correctly seated before the cable is energized.

On the CPU side, projects migrating from older controllers to the AC500 platform typically involve a PM591-ETH or PM595 central processing unit, which hosts the ModuleBus master port that the TK801V006 connects to. If the project also involves expanding communication to PROFIBUS DP or PROFINET networks, the CM572-DP communication module or CM589-PNIO Ethernet adapter may be installed in the same CPU rack, sharing the same backplane bus. Ensuring the TK801V006 cable length and routing do not introduce signal degradation is essential when these communication modules are active.

For installations where the S500 I/O station is powered separately from the CPU rack, the PS501 or PS560 power supply modules provide the 24 VDC rail required by the I/O modules. Verifying that the power supply capacity matches the total I/O load after a module upgrade is a standard commissioning step that should accompany any cable replacement. In multi-cabinet layouts, signal isolators or surge protection terminal blocks are often inserted between the cable run and the I/O modules to protect against ground loops and transient voltages common in heavy industrial environments.

Finally, for programming and diagnostics during the retrofit, the TK501 USB programming cable or an Ethernet-connected laptop running ABB Automation Builder (the successor to Control Builder Plus) is used to upload the migrated program to the new CPU. TOPNLMS can supply the TK801V006 alongside other AC500 spare parts and accessories to consolidate your procurement and reduce lead time.

Retrofit Guidance FAQ

Q: Can I replace a damaged TK801V006 without reconfiguring the AC500 CPU?
A: Yes. The TK801V006 is a passive cable with no firmware or address settings. Replacing it requires only powering down the I/O station, swapping the cable, and powering back up. The CPU will automatically re-establish ModuleBus communication with all connected S500 modules without any program changes.

Q: What is the maximum cable length supported by the ModuleBus extension?
A: ABB specifies maximum ModuleBus extension distances in the AC500 system manual. The TK801V006 is designed for inter-cabinet runs within the distances defined by the AC500 hardware specification. For longer distances, a ModuleBus repeater or a transition to a fieldbus such as PROFIBUS DP should be considered.

Q: Is the TK801V006 compatible with both the AC500 V2 and V3 hardware generations?
A: The TK801V006 is compatible with the AC500 platform as documented in ABB’s hardware catalog. Customers migrating from V2 to V3 CPU modules should verify the specific connector pinout against the V3 hardware manual, as ABB introduced updated module form factors in the V3 generation. TOPNLMS technical support can assist with compatibility verification prior to shipment.

Q: Can this cable be used in a PROFIBUS or PROFINET network?
A: No. The TK801V006 is specific to the ModuleBus I/O extension protocol used between AC500 CPUs and S500 I/O stations. PROFIBUS DP and PROFINET communication use separate cables and communication modules (e.g., CM572-DP or CM589-PNIO) and are not carried over the ModuleBus cable.

Q: What physical space is required for installation?
A: The cable is routed between standard DIN-rail mounted AC500 CPU racks and S500 I/O terminal units. No additional mounting hardware is required beyond the existing rack and terminal unit installation. The cable should be routed away from high-voltage conductors and secured with cable ties at regular intervals per ABB installation guidelines.

Q: How do I verify the cable is functioning correctly after installation?
A: After powering up, the AC500 CPU’s diagnostic LEDs and the Automation Builder hardware configuration tool will indicate the status of all connected S500 I/O modules. A green RUN status on all I/O modules confirms that the ModuleBus communication via the TK801V006 is operating correctly.

Warranty Assurance

Every ABB TK801V006 (3BSC950089R2) shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to shipment, each unit undergoes a visual and functional inspection to verify connector integrity, cable continuity, and correct labeling. Units that do not pass inspection are not shipped.

In the event of a warranty claim, TOPNLMS will arrange a replacement unit or issue a refund based on the customer’s preference and the nature of the defect. Our after-sales response target is within 24 business hours of a warranty inquiry being received. Customers are encouraged to retain the original packaging and shipping documentation to facilitate any warranty process.

For time-critical applications where a spare must be on-site before the original is returned, TOPNLMS can discuss advance replacement arrangements on a case-by-case basis. We understand that in industrial environments, waiting for a return-and-replace cycle is often not operationally acceptable.

Stock is maintained in Xiamen, China, with standard international shipping via DHL Express, FedEx, or UPS. Most orders to Europe, Southeast Asia, and the Middle East are delivered within 3–7 business days. Expedited shipping options are available for urgent requirements.

For procurement inquiries, technical compatibility questions, or bulk order pricing, contact the TOPNLMS team directly.