ABB 6318/2TDHHP Replacement/Upgrade Solution for 6318 Series

Product Overview

ABB 6318/2TDHHP Replacement/Upgrade Solution for 6318 Series: Smooth Transition from Legacy Cooling Systems

The ABB 6318/2TDHHP is a DC axial cooling fan engineered for ABB’s 6318 series industrial drive and control cabinet platforms. As ABB progressively phases out legacy thermal management components across its ACS, ACS800, and ACS880 drive families, many facilities operating older variable-speed drive (VSD) enclosures, motor control centers (MCCs), and power conversion cabinets face an urgent need to source a verified, drop-in replacement that preserves system uptime without requiring a full drive overhaul.

TOPNLMS maintains ready stock of the ABB 6318/2TDHHP to support planned maintenance cycles, emergency breakdowns, and phased modernization programs. Each unit is sourced from authorized supply channels, individually inspected before dispatch, and backed by a 12-month warranty covering manufacturing defects and premature failure under normal operating conditions.

Compatibility Comparison Table

Seamless Upgrade Solutions

Replacing the ABB 6318/2TDHHP is rarely an isolated task. In most retrofit and modernization projects, the cooling fan replacement is part of a broader effort to restore or upgrade the thermal management and power delivery architecture of an aging drive cabinet. During the migration process, engineers commonly address several interdependent components to ensure long-term reliability.

In ACS800 and ACS880 drive enclosures, the cooling fan works in conjunction with the drive’s IGBT power module and DC bus capacitor bank. When the fan is replaced as part of a scheduled overhaul, it is best practice to simultaneously inspect the drive’s AINT or AINT-02C interface board and the RDCO-03 communication adapter if the drive is integrated into a PROFIBUS or DeviceNet network. Ensuring these communication modules are functioning correctly prevents nuisance faults after the fan swap.

For cabinets using ABB’s AC500 PLC platform to supervise drive operations, the PM591 or PM595 CPU module may be involved in fan fault monitoring via digital input cards such as the DC532 or DC522. Verifying that the I/O wiring from the fan’s thermal contact to the PLC input terminal block is intact and correctly mapped in the control program eliminates false alarms post-replacement.

In older installations where the drive cabinet also houses an ABB ACS355 or ACS550 standalone drive, the cooling fan replacement may coincide with a firmware update or parameter backup using the ABB Drive Composer or DriveWindow software tool. Backing up parameters before any physical intervention is a non-negotiable step in any responsible retrofit workflow.

Where the control cabinet integrates a Modbus RTU or PROFINET communication backbone, the replacement procedure should also verify that the ABB FMBA-01 or FPBA-01 fieldbus adapter modules are seated correctly and that the network topology is unaffected by the maintenance window. Signal isolation modules between the PLC I/O and the drive’s analog input channels should also be checked for drift, particularly in high-vibration environments where the original fan failure may have been caused by mechanical resonance rather than electrical fault.

For facilities managing multiple drive cabinets, TOPNLMS recommends holding a minimum buffer stock of two to three ABB 6318/2TDHHP units per site to eliminate lead-time risk during unplanned outages. Our team can assist with consolidated purchase orders covering multiple SKUs across the ABB cooling fan and drive accessory range.

Retrofit Guidance FAQ

Q: Does replacing the 6318/2TDHHP require any wiring changes?
A: No. The 6318/2TDHHP is a direct replacement with an identical connector and DC voltage rating. Existing wiring harnesses and terminal connections are fully reusable without modification.

Q: Will the replacement fan affect drive parameters or PLC programs?
A: No parameter or program changes are required. The fan operates as a passive thermal management component and does not interact with the drive’s control logic or PLC program structure.

Q: Is the 6318/2TDHHP compatible with PROFIBUS, PROFINET, or Modbus RTU networks?
A: The fan itself has no network interface. Communication protocol compatibility is governed by the drive’s fieldbus adapter (e.g., FPBA-01 for PROFINET, FMBA-01 for Modbus). Replacing the fan does not affect network configuration.

Q: What is the physical installation space requirement?
A: The 6318/2TDHHP matches the OEM form factor exactly. No cabinet cutout modification, bracket adaptation, or airflow duct rerouting is needed.

Q: Can this fan be used as a spare for preventive maintenance programs?
A: Yes. TOPNLMS recommends stocking this unit as a critical spare. It ships in original or equivalent protective packaging and can be stored in standard warehouse conditions for extended periods without degradation.

Q: How long does shipping take?
A: In-stock units are dispatched within 1–2 business days from our Xiamen warehouse. International express delivery (DHL, FedEx, UPS) typically reaches most destinations within 3–7 business days. Tracking information is provided upon dispatch.

Warranty Assurance

Every ABB 6318/2TDHHP unit supplied by TOPNLMS is covered by a 12-month warranty from the date of delivery. Our pre-shipment inspection process includes visual examination, electrical continuity verification, and rotational function testing to confirm the unit meets OEM performance specifications before it leaves our facility.

In the event of a warranty claim, TOPNLMS provides a straightforward replacement or refund process with no unnecessary delays. Our technical support team is available to assist with installation questions, compatibility verification, and post-installation commissioning guidance. We maintain detailed dispatch records for every order, enabling rapid traceability in the event of a field issue.

For procurement teams managing approved vendor lists (AVL) or requiring documentation for quality management systems (ISO 9001 environments), TOPNLMS can provide packing lists, commercial invoices, and test records upon request.

Contact our team for volume pricing, consolidated spare parts orders, or urgent same-day dispatch inquiries.