The ABB 1KHW002238R0001 is a high-speed optical interface circuit board, frequently identified by the assembly codes N4BG and OPIC1 R1A. This board is a critical component in ABB’s high-power electronics and excitation systems (such as the UNITROL series), serving as the galvanic isolation barrier and communication bridge between the control logic and power semiconductor firing circuits via fiber optic links.
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Product Specifications
| Feature | Details |
| Model Name | OPIC1 R1A / N4BG |
| Product ID | 1KHW002238R0001 |
| Associated ID | 1KHW002237R0001 (Sub-assembly) |
| Country of Origin | Switzerland |
| Interface Type | Fiber Optic (ST/HFBR Connectors) |
| Function | Optical-to-Electrical Signal Conversion |
| Dimensions (WxHxD) | 145 x 220 x 25 mm |
| Net Weight | 0.42 kg |
| Power Requirement | 15V / 24V DC (System dependent) |
Operational Precautions
- Fiber Optic Integrity: Inspect the optical ports for dust or debris before connecting cables. Use specialized lint-free swabs and isopropyl alcohol to clean ports if signal attenuation is detected.
- Static Discharge: The OPIC1 board contains sensitive optocouplers and high-speed logic ICs; always handle the board using an ESD-compliant wrist strap and mat.
- Connector Alignment: When mounting the board into the electronics frame, ensure the multi-pin backplane connectors are perfectly aligned to avoid bending pins or causing short circuits.
- Signal Verification: After replacement, verify the “Signal Healthy” or “Link” LEDs are active. A flickering or dark LED usually indicates a faulty fiber optic cable or insufficient light intensity.
FAQ (Questions & Answers)
Q: What is the difference between the 1KHW002238 and 1KHW002237 numbers? A: Typically, 1KHW002238R0001 refers to the complete functional circuit board assembly, while 1KHW002237R0001 may refer to the raw PCB or a specific sub-component layer within the assembly.
Q: In which ABB systems is the OPIC1 board commonly used? A: It is most frequently found in UNITROL 6000 excitation systems and MEGATROL power electronic converters where high-voltage isolation is required for gate signaling.
Q: Can this board be used with plastic optical fiber (POF)? A: Most OPIC1 variants are designed for 650nm (red light) communication. Compatibility depends on the specific transceivers installed; check if your system uses 1mm POF or HCS (Hard Clad Silica) fibers.
Similar Optical & Control Models
- OPIC2 (1KHW002239R0001): Advanced version with higher channel density.
- UNS2881b-P,V1 (3BHE014557R0001): Measurement and interface board for UNITROL systems.
- SDCS-COM-81 (3ADT220090R0001): Communication board with multiple optical channels.
- 3BHE022293R0101: Fiber optic converter module for power stacks.
- CIN 11 (3BHE001712R0001): Control interface and signal processing card.
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