KEBA DI325/B Replacement for CP260/CP262 Series

Product Overview

KEBA DI325/B Replacement for CP260/CP262 Series: Seamless Transition & Legacy System Compatibility

Upgrading or replacing a KEBA DI325/B digital input module in an existing CP260 or CP262 PLC installation is one of the most common retrofit scenarios in KEBA-based industrial control systems. Whether your original DI325/B has reached end-of-life, suffered field damage, or is simply no longer available through standard distribution channels, TOPNLMS supplies verified replacement units that restore your system to full operational status with minimal engineering effort and zero compromise on signal integrity.

The DI325/B is a 24 VDC digital input module designed for direct integration into the KEBA CP260 and CP262 controller backplane. It provides 16 channels of isolated digital input, each rated for standard IEC 61131-2 Type 1/3 input signals. The module communicates with the CP260/CP262 CPU over the internal KEBA backplane bus, requiring no additional fieldbus wiring or protocol conversion when used as a like-for-like replacement. Field wiring terminations follow the standard KEBA 40-pin front connector layout, meaning existing cable harnesses, terminal blocks, and field junction boxes can be reused without modification — a critical advantage when minimizing downtime during an unplanned replacement.

Compatibility Comparison Table

Seamless Upgrade Solutions

A DI325/B replacement rarely happens in isolation. In most CP260 and CP262 installations, the digital input module sits alongside a full complement of I/O and communication components that may also require attention during a planned or emergency retrofit. When engineering teams commission a replacement DI325/B, they frequently audit the adjacent slots in the same rack for aging DO325/B digital output modules and AI325/B analog input modules, both of which share the same backplane bus architecture and front connector standard. Replacing these in the same maintenance window eliminates the risk of a secondary failure shortly after the primary repair.

The CP260 or CP262 CPU module itself is often the next item on the replacement list, particularly in installations where the controller has been running continuously for more than a decade. KEBA CP260 and CP262 CPUs use a compact flash card for program storage; verifying the integrity of this card — and having a spare CP260 CPU on hand — is standard practice before committing to a DI325/B swap in a critical production environment.

Communication continuity is another key concern. Many CP260/CP262 systems interface with PROFIBUS DP networks using a KEBA CM260 or CM262 communication module mounted in the same rack. During a module replacement, it is essential to confirm that the PROFIBUS address settings and baud rate configuration on the CM260/CM262 are documented before powering down, as these parameters must be restored exactly to avoid network faults on restart. Similarly, installations using Ethernet-based supervisory systems may rely on a KEBA EM260 Ethernet module for SCADA or HMI connectivity — this module should be inspected for firmware currency during the same service visit.

On the power supply side, the KEBA PS260 power supply module provides the regulated backplane voltage for the entire CP260/CP262 rack. A degraded PS260 is a common root cause of intermittent I/O module faults, including false input readings that are sometimes misdiagnosed as a DI325/B failure. Verifying output voltage ripple on the PS260 before and after the DI325/B replacement is a recommended step in any systematic retrofit procedure.

For installations where the CP260/CP262 rack is mounted inside a legacy control cabinet alongside third-party drives or motor starters, signal isolation between the field wiring and the PLC input channels is often achieved using DIN-rail-mounted signal isolators or relay output modules. These components — while not KEBA-branded — are part of the same upgrade scope and should be reviewed for compatibility with the replacement DI325/B’s input threshold voltages.

Finally, programming cable access is required if the CP260/CP262 CPU needs a firmware update or program reload following the hardware replacement. KEBA programming cables compatible with the CP260/CP262 series use a standard RS-232 or USB-to-serial interface to the CPU’s front port, and having a verified cable and a licensed copy of the KEBA eCockpit or IEC 61131-3 programming environment available on-site before the replacement begins is essential for a same-day commissioning outcome.

Retrofit Guidance FAQ

Q: Can I replace the DI325/B without modifying the existing field wiring?
A: Yes. The DI325/B uses the standard KEBA 40-pin front connector. All existing field wiring, terminal assignments, and cable labels remain valid for a like-for-like replacement. No rewiring is required.

Q: Do I need to reload the PLC program after replacing the DI325/B?
A: No. The CP260/CP262 CPU automatically recognizes the DI325/B on the backplane after a controlled restart. The existing program, I/O mapping, and variable assignments remain intact. A program reload is only necessary if the CPU flash card is also being replaced.

Q: Is the DI325/B compatible with the CP250 or CP270 controllers?
A: The DI325/B is designed and validated for the CP260 and CP262 backplane. Compatibility with CP250 is partial and hardware-revision-dependent; CP270 compatibility requires firmware verification. Contact TOPNLMS with your full system configuration for a pre-sale compatibility assessment.

Q: What communication protocols does the DI325/B support?
A: The DI325/B communicates exclusively over the KEBA internal backplane bus. It does not require or support any external fieldbus protocol (PROFIBUS, Modbus, EtherNet/IP) independently — those functions are handled by dedicated communication modules such as the CM260/CM262 in the same rack.

Q: How much physical space does the replacement module require?
A: The DI325/B occupies a single slot in the CP260/CP262 rack — identical to the original. No rack expansion, additional mounting hardware, or cabinet modification is required.

Q: What is the recommended procedure for replacing the DI325/B in a live production environment?
A: Schedule a controlled CPU stop during a planned maintenance window. Document all I/O channel assignments and communication module parameters before powering down. Remove the faulty DI325/B, insert the replacement unit, restore power, and perform a supervised restart. Verify all 16 input channels against the field device status before returning the system to automatic mode. Total replacement time for an experienced technician is typically under 30 minutes.

Warranty Assurance

Every KEBA DI325/B unit supplied by TOPNLMS is covered by a 12-month warranty from the date of shipment. Prior to dispatch, each module undergoes a functional verification procedure that confirms backplane bus communication, input channel continuity across all 16 channels, and correct response to IEC 61131-2 Type 1/3 input signals. Units that do not pass this verification are not shipped.

In the event of a warranty claim, TOPNLMS provides a replacement unit dispatch within 3 business days of fault confirmation, with no requirement to return the defective unit before the replacement is shipped in most cases. Our after-sales team is reachable by email and phone during business hours (UTC+8) and responds to warranty inquiries within 24 hours.

For procurement teams managing critical spare parts inventories, TOPNLMS can provide batch testing reports, individual serial number traceability, and export documentation suitable for customs clearance in major industrial markets. Stock is held in Xiamen and ships via DHL Express, FedEx International Priority, or sea freight depending on order volume and urgency.

Purchasing a verified replacement DI325/B from TOPNLMS eliminates the risk of sourcing counterfeit or untested modules from unverified secondary market channels — a risk that is particularly acute for discontinued KEBA CP260/CP262 series components where OEM supply has ended.