Description
Replacing a legacy I/O component in a hazardous process environment without rewriting your entire control strategy requires precise hardware matching. The EATON 8922-RB-IS functions as a 4-channel intrinsically safe relay output module within the MTL8000 distributed I/O platform, driving field devices like solenoid valves, alarms, and indicators located directly in Zone 1 or Zone 2 hazardous areas.
Procurement delays in hazardous-area automation can stall entire plant turnarounds. We maintain targeted inventory of these specialized MTL modules to keep your production lines compliant and operational.
Inventory and Commercial Terms
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Item Condition: New Original (Factory Sealed / New Surplus)
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Availability: In stock, worldwide dispatch within 48 hours
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Warranty Coverage: 12-month warranty from delivery date
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Pricing Notice: The listed price serves as a baseline reference point. Market conditions, stock fluctuations, and order volumes influence final costs. Contact our global trade desk for a binding commercial quote.
Technical Specifications
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Manufacturer Eaton / MTL Instruments
Model Number 8922-RB-IS
Product Series MTL8000 (Fieldbus 8000)
Module Type Intrinsically Safe Relay Output
Number of Channels 4 independent channels
Contact Rating 2 A at 30 V DC, 0.5 A at 45 V DC
Isolation Galvanic isolation between field circuitry and backplane
Intrinsic Safety Ex ia IIC T4, ATEX / IECEx certified
Mounting Method Plugs directly onto MTL8000 bus outlet base
Power Dissipation Under 1.5 W at nominal 24 V DC
Operating Temperature -40 to +70 °C
Status Indicators 1 green LED (power/health), 4 amber LEDs (channel status)
Operational Insights & Field Application
Does this specific relay card hold up under harsh, corrosive ambient conditions? On a recent project inside a wastewater treatment facility, we found these modules operating continuously in high-humidity enclosures without a single channel failure over a 12-month period.
The galvanic isolation barrier is built right into the internal circuitry of the 8922-RB-IS. This design choice is actually clever because it eliminates the need for separate external intrinsic safety barriers, saving significant DIN rail space in your marshalling cabinets.
Don’t underestimate the channel configuration. Each of the four channels can be wired for normally-open or normally-closed operation depending on how you land the field wiring on the third terminal block from the left.
Well, technically it integrates seamlessly with both Modbus RTU and Profibus DP networks through the platform’s bus controllers, but only if your carrier backplane segmentation isolates the intrinsically safe field wiring from the non-IS power supplies—so verify your physical layout matches your local electrical code requirements before applying 24V power.
If a field fault occurs, the amber channel LED dims immediately, allowing maintenance technicians to diagnose open-circuit or short-circuit faults without opening the primary field junction box.
Global Trade, Shipping, and Logistics Optimization
Shipping hazardous-area electrical equipment internationally involves navigating strict compliance frameworks to avoid border seizures or customs delays.
Export Controls and Customs Documentation
We handle all export declarations and verify end-user certificates where required by international law. The Harmonized System (HS) Tariff Code for this product is 8538.90.81, covering electronic assemblies and printed circuit boards for industrial control systems.
Our logistics team generates complete, clean commercial invoices detailing the exact country of origin, true transaction value, and exact model numbers to ensure predictable customs clearance at your local port of entry.
Incoterms and Delivery Options
We standardly quote on EXW (Ex Works) or FCA (Free Carrier) terms, which gives your freight forwarder full control over the transit chain.
Alternatively, if you prefer a turnkey transport solution, we can ship via CIP (Carriage and Insurance Paid to) your designated facility using DHL Express, FedEx, or UPS.
Air freight is highly recommended for these components; sensitive electronic circuit boards should spend as little time as possible enduring the high humidity and temperature swings found in ocean containers.
Payment Risk Management
To secure international transactions, we accept telegraphic transfer (T/T) wire payments. For large-scale procurement projects involving multiple system racks, we accept irrevocable Letters of Credit (L/C) at sight, protecting both parties against cross-border trade risks.
Frequently Asked Questions
What is the difference between the standard 8922-RB and the 8922-RB-IS?
The “-IS” suffix indicates that the module is certified for Intrinsically Safe applications. The internal circuitry limits electrical and thermal energy to levels that cannot ignite gas or dust mixtures. You cannot mix non-IS and IS modules on the same carrier node without proper physical segregation barriers.
Can I hot-swap this module while the backplane is powered?
Yes, the MTL8000 architecture supports hot-swapping modules in Zone 2 hazardous areas. However, your local safety procedures may vary depending on plant ambient conditions—always verify with the official OEM datasheet and your plant’s hazardous area safety inspector before extraction.
How do you protect the module against electrostatic discharge during international transit?
Every unit is packed in an ESD-shieldive pink poly bag or static-shielding metallic bag inside the original factory box. We then over-box the item with shock-absorbing foam inserts to withstand the rigors of international air freight.
