KONTRON CP306-36780 Replacement for VME Series

Product Overview

KONTRON CP306-36780 Replacement for VME Series: Smooth Migration & Legacy System Upgrade

The KONTRON CP306-36780 VME PC Memory Board is a proven solution for engineers and procurement teams managing the lifecycle of VME-bus-based industrial control systems. As legacy VME platforms approach end-of-life and original KONTRON CP306-36780 units become increasingly scarce, this board provides a direct, drop-in replacement path that preserves your existing rack architecture, backplane wiring, and software environment — minimizing both engineering rework and unplanned downtime.

Designed to fit standard 6U VME mechanical form factors, the CP306-36780 slots directly into existing VME64 or VMEbus backplanes without requiring chassis modification. Engineers migrating from earlier KONTRON CP306 variants or from third-party VME memory boards will find that the board’s edge connector pinout, power rail requirements (+5 V, ±12 V), and address mapping remain consistent with the VME specification, enabling a straightforward swap during a scheduled maintenance window.

For control system integrators managing multi-board VME crates, the CP306-36780 is typically deployed alongside KONTRON CP306 single-board computers, KONTRON CP307 processor boards, and VME transition modules that route I/O signals from the backplane to field wiring. When the host SBC is a KONTRON CP306 or a compatible PowerPC-based controller, the memory board’s shared-memory interface allows deterministic data exchange between the processor and I/O subsystems — a critical requirement in real-time process control and SCADA applications.

Migration projects frequently involve replacing not just the memory board but the surrounding infrastructure. In practice, this means evaluating the KONTRON CP306 CPU board, the VME power supply module, and the VME crate or chassis itself. If the existing crate uses a passive backplane with J1/J2 connectors, the CP306-36780 is fully compatible without adapter hardware. For systems that also include KONTRON CP307 communication boards or third-party VME serial interface modules, the memory board’s address space can be configured via onboard DIP switches or jumpers to avoid conflicts — a step that should be documented in the site-specific retrofit plan.

In DCS and distributed I/O architectures where the VME crate serves as a local controller node, the CP306-36780 often works in conjunction with VME-to-fieldbus gateway modules supporting PROFIBUS-DP, Modbus RTU, or CANopen. Replacing the memory board does not require changes to the fieldbus configuration or PLC program, provided the new board is mapped to the same logical address range as the original. This address continuity is one of the key advantages of a like-for-like replacement strategy and is strongly recommended for brownfield retrofit projects where re-validation costs must be minimized.

For facilities running SIMATIC, Allen-Bradley, or Schneider Electric PLCs that interface with VME-based co-processors or data acquisition boards, the CP306-36780 can serve as a shared-memory bridge, buffering process data between the VME subsystem and the primary PLC rack. In these hybrid architectures, the memory board’s dual-port SRAM or DRAM configuration allows simultaneous read/write access from both the VME master and an external host, eliminating the need for additional communication modules or protocol converters.

Procurement teams should note that TOPNLMS maintains verified stock of the KONTRON CP306-36780, sourced from decommissioned systems and authorized surplus channels. Each unit undergoes functional testing prior to shipment, including power-on self-test verification, memory address line continuity checks, and VME bus arbitration validation. Units are shipped in anti-static packaging with full inspection documentation.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful CP306-36780 migration rarely involves a single board in isolation. In most VME-based control cabinets, the memory board operates as part of a tightly integrated subsystem. During the upgrade process, engineers commonly evaluate the KONTRON CP306 single-board computer as the host processor, since the CP306-36780 was originally qualified for use in CP306-based VME crates. If the SBC itself is also approaching end-of-life, a coordinated replacement of both the processor board and the memory board during the same maintenance window reduces the risk of a second unplanned outage.

Power integrity is another critical factor. VME backplane power supplies — whether integrated into the crate or supplied by a standalone VME power supply module — must deliver stable +5 V and ±12 V rails within VME specification tolerances. Before installing the CP306-36780, it is advisable to verify the output voltage and ripple of the existing power supply, particularly in crates that have been in continuous service for more than five years.

For systems that use VME transition modules or rear-transition modules (RTMs) to route analog or digital I/O signals from the backplane to terminal blocks, no changes to the RTM wiring are required when replacing the memory board, since the CP306-36780 does not occupy rear I/O space. Similarly, if the crate includes KONTRON CP307 communication boards or third-party VME serial interface modules for Modbus RTU or PROFIBUS-DP connectivity, these boards continue to operate independently of the memory board replacement.

In hybrid architectures where the VME subsystem interfaces with a SIMATIC S7 or Allen-Bradley ControlLogix PLC via a VME-to-PLC gateway module, the shared-memory interface of the CP306-36780 allows the PLC to read and write process data without changes to the PLC program, provided the gateway’s memory map is preserved. Programming cables and configuration tools used for the SBC or gateway modules — such as RS-232 console cables or Ethernet-based configuration interfaces — are unaffected by the memory board swap.

For facilities that also need to replace VME I/O modules, analog input boards, or digital output boards within the same crate, TOPNLMS can assist with sourcing compatible VME I/O modules and signal conditioning components to support a comprehensive crate-level retrofit rather than a piecemeal replacement approach.

Retrofit Guidance FAQ

Q: Do I need to re-wire the control cabinet when replacing the CP306-36780?
No. The CP306-36780 is a backplane-powered VME board with no direct field wiring connections. All power and data signals are routed through the VME J1/J2 backplane connectors. No changes to cabinet wiring, terminal blocks, or cable harnesses are required.

Q: Will my existing PLC or SBC program need to be modified?
Not if the replacement board is configured to the same VME address range as the original. Use the onboard DIP switches or jumpers to match the address map of the outgoing unit. Document the original settings before removal.

Q: Is the CP306-36780 compatible with both VME64 and legacy VMEbus backplanes?
Yes. The board uses the standard DIN 41612 J1/J2 connector and is compatible with both VME64 and earlier VMEbus backplanes conforming to IEEE 1014. No adapter or interposer is required.

Q: What communication protocols are supported?
The CP306-36780 communicates via the VMEbus shared-memory protocol. It does not implement fieldbus protocols (PROFIBUS, Modbus, CANopen) directly — those are handled by dedicated communication boards in the same crate. The memory board is transparent to fieldbus traffic.

Q: How much physical space does the board require?
The CP306-36780 occupies a single 6U VME slot. No adjacent slots need to be cleared unless the original installation required a slot gap for thermal management, which should be replicated in the replacement installation.

Q: What is the recommended commissioning procedure after installation?
Power on the VME crate with the new board installed and verify the power-on self-test (POST) completes without error. Confirm that the host SBC or PLC can read and write to the expected memory addresses. Run a functional test of the application software before returning the system to production.

Warranty Assurance

Every KONTRON CP306-36780 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Prior to shipment, each board undergoes a structured pre-delivery inspection that includes power-on self-test verification, memory address line continuity testing, and VME bus arbitration validation. Units that do not pass all test criteria are quarantined and not offered for sale.

In the event of a warranty claim, TOPNLMS provides a replacement unit or full refund within the warranty period. Our technical support team is available to assist with installation questions, address configuration, and compatibility verification before and after delivery. Response time for warranty inquiries is typically within one business day.

For procurement teams managing critical infrastructure, TOPNLMS can provide test reports and inspection documentation upon request. Expedited shipping options are available for urgent replacement requirements, with dispatch from Xiamen typically within 24–48 hours of order confirmation.

We understand that unplanned downtime in industrial control environments carries significant operational and financial consequences. Our inventory management and quality assurance processes are designed to support your maintenance and retrofit programs with reliable, tested components and responsive after-sales support.