Description
Overview
The KJ4001X1‑HC1 (12P0831X072) LocalBus Left Extender is a communication expansion component used within Emerson DeltaV M‑Series I/O architectures. It extends the LocalBus connection on the left side of an I/O carrier assembly, enabling additional modules to be added while maintaining stable backplane communication across the subsystem.
Functional Characteristics
This extender provides a secure mechanical and electrical interface for extending the LocalBus path. It ensures proper signal continuity, grounding, and alignment between adjacent carriers. Its compact form factor supports high‑density cabinet layouts and simplifies system expansion without requiring major structural changes.
Key Features
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Extends the DeltaV LocalBus on the left side of an I/O carrier
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Maintains communication integrity across multiple carriers
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Compact, lightweight design for tight cabinet installations
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Durable construction suitable for industrial temperature and vibration ranges
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Supports seamless integration with DeltaV M‑Series I/O subsystems
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Designed for quick installation and field replacement
Technical Specifications
| Parameter |
Specification |
| Model / Part Number |
KJ4001X1‑HC1 / 12P0831X072 |
| Product Type |
LocalBus Left Extender |
| System Compatibility |
DeltaV M‑Series I/O Subsystem |
| Dimensions |
4.7 × 16.7 × 4.4 cm |
| Weight |
0.14 kg |
| Operating Temperature |
−40°C to +70°C |
| Electrical Interface |
DeltaV LocalBus backplane extension |
| Housing Material |
Industrial‑grade polymer and metal composite |
| Mounting Method |
Carrier‑side mechanical latch |
| Certifications |
CE, UL |
| HS Code |
8537101190 |
| Country of Origin |
USA |
| System Type |
DCS communication extender |
Application Scenarios
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Expansion of DeltaV M‑Series I/O banks
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Control cabinets requiring additional carriers on the left bus segment
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Installations with limited space requiring compact communication extenders
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Environments with moderate electrical noise requiring stable bus continuity
Additional Notes
The extender does not provide standalone communication services; it functions strictly as a LocalBus extension component. Its mechanical design ensures proper alignment and grounding between carriers, which is essential for maintaining DeltaV backplane reliability.
FAQ
Q: What is the purpose of a LocalBus Left Extender A: It extends the DeltaV LocalBus to allow additional I/O carriers to be added on the left side of an existing assembly.
Q: Is this extender compatible with S‑Series hardware A: No. It is designed specifically for M‑Series I/O subsystems.
Q: Does it require external power A: No. It relies on the DeltaV backplane for all electrical connections.
Q: Is this model still available from Emerson A: It was discontinued at the end of 2018, but it remains widely used in existing DeltaV installations.
