Description
Product Description
Overview
The LocalBus Extender (Nemko 02ATEX431U) by Emerson is engineered for DeltaV systems in hazardous environments. Certified for Zone 2 / II 3 G applications, it ensures safe interconnection between I/O carriers without compromising system integrity. The module provides robust DC power distribution while maintaining compliance with international safety and environmental standards.
Key Features
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Certified for hazardous atmospheres: EEx nA IIC T4, ATEX II 3 G
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LocalBus circuit power: 12.6 VDC at 15 A for reliable device operation
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Supports safe interconnection of I/O carriers up to 6.5 meters
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Compliance with airborne contaminant standards ISA-S71.04 Class G3
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Fully enclosed, IP20-rated for environmental protection
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No user-serviceable parts; maintenance-free and calibration-free
Technical Specifications
| Feature |
Specification |
| Model / Part Number |
LocalBus Extender / Nemko 02ATEX431U |
| Hazardous Area Rating |
II 3 G, EEx nA IIC T4 |
| LocalBus Power |
12.6 VDC, 15 A |
| Ambient Temperature |
-40°C to 70°C |
| Shock Resistance |
10g, ½ sine wave, 11 ms |
| Vibration |
1 mm P-P from 5–16 Hz; 0.5g from 16–150 Hz |
| Airborne Contaminants |
ISA-S71.04 Class G3 |
| Humidity |
5–95%, non-condensing |
| IP Rating |
IP20 |
| Installation Restrictions |
Max combined I/O and extender length: 6.5 meters; interconnecting cables must run in conduit |
| Maintenance |
No user-serviceable components; disassembly prohibited |
Safety and Installation Notes
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Must be powered down before insertion or removal
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Follow DeltaV Zone 2 installation procedures (document 12P2046)
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Ensure area safety before unplugging or disconnecting the unit
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Only certified personnel should handle hazardous-area modules
Applications
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Zone 2 process automation nodes requiring secure I/O expansion
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Interconnection of DeltaV I/O carriers in extended layouts
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Environments with airborne contaminants and variable temperatures
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Systems requiring high-reliability power distribution in hazardous zones
FAQ
Q: Can this module be removed with system power on?
A: No. The system must be de-energized before removal or insertion.
Q: Are calibration or maintenance required?
A: No. The unit contains no serviceable parts and does not require calibration.
Q: What is the maximum connection length for I/O carriers with this extender?
A: Combined I/O carriers and extenders must not exceed 6.5 meters.
Q: What environmental conditions can it operate in?
A: It supports -40°C to 70°C, withstands shock up to 10g, vibration per specs, and 5–95% non-condensing humidity.
