If you are searching for a DEIF PPU-2 replacement, first establish whether you need a spare for the existing installation or a controller upgrade. Those are different purchasing requirements, with different engineering work behind them.
DEIF marks PPU-2 as end of life and names PPU 300 as its replacement in the product programme. However, the current PPU 300 page also says that it is being phased out, is not recommended for new designs, and is being replaced by iE 250 Marine. These statements were checked on 4 October 2026. DEIF PPU-2, DEIF PPU 300.
This makes current lifecycle research essential. An older recommendation may describe a successful past upgrade without identifying the best option for a project being planned today.
Read the replacement history in context
The manufacturer’s product sequence provides a starting point:
| Product | Current manufacturer statement | Purchasing implication |
|---|---|---|
| PPU-2 | End of life; replaced in the programme by PPU 300 | Investigate exact-spare availability separately from upgrade options |
| PPU 300 | Being phased out; not recommended for new designs | Confirm lifecycle and support suitability before specifying a retrofit |
| iE 250 Marine | Named as the programme replacement for PPU 300 | Obtain an application-specific engineering assessment |
This table is a lifecycle summary, not an interchangeability table.
The iE 250 Marine is a configurable, modular controller for maritime applications. Its position in the current programme does not establish that it can replace an installed PPU-2 without changes to the surrounding system. DEIF iE 250 Marine.
Establish exactly what is installed
A request stating only “PPU-2, one piece” leaves too many details unresolved.
Collect the complete controller label, order information, installed options, software version and available configuration records. Include the switchboard drawing reference and explain the controller’s role in the vessel’s power system.
Also identify the equipment around it: the associated display, supervisory controller, communication interface and other connected control devices.
DEIF’s PPU-2 documentation library includes a data sheet, option descriptions, installation instructions and a designer’s handbook. Use the documents applicable to the installed version rather than assuming that every PPU-2 has the same configuration. DEIF PPU-2 documentation.
Where information is missing, list it as an open item in the enquiry. This allows the supplier and responsible engineer to distinguish a confirmed match from a candidate requiring further checks.
Choose between an exact spare and an engineered replacement
For an exact-spare enquiry, ask the supplier to confirm:
- Complete reference and installed options.
- Hardware and software information available for the offered unit.
- Condition and actual-unit photographs.
- Included displays, connectors or accessories.
- Inspection or testing evidence.
- Quantity and lead time.
Treat configuration work as a separate requirement. A matching label is valuable evidence, but the replacement still needs to be prepared and accepted for its intended installation.
For an upgrade enquiry, request a defined engineering scope. It should address physical installation, electrical interfaces, application configuration, communication with other systems and commissioning responsibilities.
The purchase price of the controller is only one part of that comparison.
Give communication compatibility its own review
A controller can be mechanically installed while its communication with the rest of the system remains unresolved.
DEIF lists both a PPU-2-to-PPU-300 conversion application note and a separate PPU 300 Modbus template note for PPU-2 retrofits. Those titles identify communication mapping as a specific subject to review during a conversion. DEIF conversion documentation library.
Ask the engineer evaluating a proposed replacement to record:
- The existing communication method and connected systems.
- The required measurements, status indications and commands.
- Any necessary changes to addresses, mappings or supervisory software.
- How correct communication will be demonstrated during commissioning.
These are review questions, not instructions to alter a live system. The required changes depend on the installed application.
Use previous retrofit projects as examples, not guarantees
DEIF describes a PPU-2-to-PPU-300 retrofit on the Torpoint chain ferry PLYM II in which the existing switchboards and alarm-system interface could be retained. The case demonstrates what was achieved in that installation; it does not establish the same scope for every vessel. DEIF Torpoint ferry retrofit case.
When reviewing a similar proposal, ask which features of your installation have been compared with the reference project. Any unresolved difference should be visible in the quotation or engineering assessment.
Prepare the RFQ around the decision you need to make
State whether your priority is an exact spare, a planned upgrade, or a comparison of both. Include the required onboard date and the engineering window available.
Ask for the hardware supply scope and any engineering scope to be shown separately. This makes it easier to compare offers without confusing a controller quotation with a complete retrofit solution.
TIMC Marine accepts enquiries for current and legacy control parts. Explore power management and electrical control parts, or submit a PPU-2 sourcing enquiry with the complete label photographs and application details.
Confirm the proposed unit, configuration requirements and current lifecycle position before placing the order.
