Description
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | ABB |
| Model | IW93-2 |
| Assembly Number | HESG440356R1 |
| PCB Number | HESG216678/B |
| Product Type | Interface / processing module |
| System Association | ABB Procontrol P13 / legacy control systems |
| Application | Power-generation / process control |
| Input/Output Function | System and configuration dependent |
| Installation | Procontrol rack / Eurocard architecture |
| Backplane Supply | Verify against installed rack documentation |
| Communication | System dependent |
| Signal Processing | Configuration dependent |
| Isolation | Verify from original ABB documentation |
| Hardware Revision | R1 |
| Firmware | Application/system dependent |
| Operating Temperature | Verify from ABB system documentation |
A secondary technical source describes the module as having configurable analog/binary signal handling and a Procontrol P13/ABB Master association, but these details are not independently confirmed by an ABB primary document.
Product Overview
The ABB IW93-2 HESG440356R1 HESG216678/B is a legacy ABB control-system module associated with the Procontrol P13 ecosystem and older power-plant automation installations. The complete identification consists of the IW93-2 module designation, HESG440356R1 assembly number, and HESG216678/B PCB reference. Retaining all three identifiers is important when sourcing an exact replacement.
The ABB IW93-2 is generally described in available technical references as an interface, processing, or control module rather than a conventional modern PLC I/O card. One source specifically places it within Procontrol P13 and early Symphony systems and describes its purpose as specialized signal processing/interface work.
The ABB HESG440356R1 should therefore be treated as an exact legacy-system assembly. Current secondary-market listings use inconsistent descriptions, including “I/O module,” “digital controller,” and “processor unit.” For engineering procurement, these generic descriptions should not be used to infer unsupported channel counts, signal ranges, or communication protocols.
IW93-2-HESG440356R1
Main Features & Field Considerations
Procontrol system integration
The IW93-2 is repeatedly listed with other ABB legacy Procontrol components, including IT94-3, NF93A-2, AB91-1, and FC95-22. This provides useful context when identifying the rack architecture in an older power-generation control cabinet.
Multiple hardware identifiers
Use the complete identification during procurement:
- IW93-2 — module designation
- HESG440356R1 — assembly number
- HESG216678/B — PCB reference
A supplier offering only “” should be asked to confirm the remaining numbers and hardware revision.
Legacy interface/processing role
Available references describe the module as an analog/digital interface or processing unit. A separate listing calls it a processor/relay card, reinforcing that this is not necessarily a conventional field I/O card.
Replacement identification
The board should be matched against the installed Procontrol rack, slot, neighboring modules, connector arrangement, and PCB markings. For legacy control systems, functional equivalence cannot be established from physical dimensions alone.
Important Specification Warning
I found insufficient primary documentation to safely confirm detailed electrical specifications for this exact revision.
One technical source publishes values such as 24 VDC backplane supply, 150–300 mA consumption, multiple configurable analog/binary channels, and galvanic isolation, but these values are presented by a secondary source rather than an ABB primary manual.
Other listings simply classify the same assembly as an I/O module or digital controller without providing a consistent electrical specification.
I therefore recommend not publishing specific channel counts, voltage ranges, current ratings, communication protocols, or accuracy figures as confirmed specifications unless they have been verified against the original ABB documentation or the installed system records.
Replacement Checklist
Before replacing an ABB HESG440356R1, verify:
- Exact designation:
- Assembly number:
- PCB marking: HESG216678/B
- Procontrol system generation
- Rack and slot position
- Neighboring modules
- Connector configuration
- Hardware revision
- Field wiring
- Signal type and application
- Existing system configuration
- Original module photographs
- Plant-specific engineering modifications
Procurement Description
ABB HESG216678/B — Legacy Procontrol Interface / Signal-Processing Module
For a like-for-like replacement, specify the complete + + /B identification. Confirm the installed Procontrol rack and application before accepting an alternative, since public secondary-market descriptions for this module are inconsistent.
