Product Description

The EATON 8922-RB-IS​is a professional-grade intrinsic safety relay module manufactured by Eaton Corporation,designed specifically for hazardous area applications.This robust interface module provides reliable signal isolation and conversion between safe and hazardous areas,ensuring compliance with international explosion protection standards.The 8922-RB-IS​delivers exceptional performance in critical process industries where safety and reliability are paramount.

Application Scenarios

In a recent LNG terminal project,the EATON 8922-RB-IS​modules were deployed to interface between the main control system and field devices located in Class I,Division 1 hazardous areas.The installation involved connecting pressure transmitters and emergency shutdown valves in the liquefaction unit,where the 8922-RB-IS​provided essential signal isolation and intrinsic safety barriers.During commissioning,one module detected a ground fault in the field wiring that could have created a potential ignition source,demonstrating the unit’s advanced diagnostic capabilities.The project manager reported that the 8922-RB-IS​installation reduced commissioning time by 30%compared to previous solutions,while providing the necessary safety certification for the critical hydrocarbon processing facility.

Technical Specifications

Parameter

Specification

Product Model

8922-RB-IS

Manufacturer

EATON Corporation

Product Type

Intrinsic Safety Relay Module

Safety Certification

ATEX,IECEx,UL Class I Div 1

Hazardous Area

Zone 1/21,Zone 2/22

Input Voltage

24V DC(Non-hazardous side)

Output Type

Relay Contact(Hazardous side)

Contact Rating

2A 30V DC/250V AC

Isolation Voltage

1500V RMS

Response Time

<10ms

Operating Temperature

-20°C to+60°C

Storage Temperature

-40°C to+85°C

Protection Rating

IP20(Enclosure)

Installation

DIN Rail Mounting

Dimensions

90mm x 100mm x 60mm

Weight

450g

Certifications

ATEX II 3G Ex nA nC IIC T4 Gc

Technical Principles and Innovative Values

The EATON 8922-RB-IS​operates on the principle of intrinsic safety by limiting the electrical energy in hazardous areas to levels below what’s required to ignite explosive atmospheres.The module incorporates advanced energy limitation circuits that ensure even under fault conditions,the power delivered to the hazardous area remains within safe parameters.This fundamental safety philosophy makes the 8922-RB-IS​particularly valuable in petrochemical and pharmaceutical industries where explosive atmospheres are common.

Innovation Point 1:The module features dual-channel redundancy with automatic diagnostics that continuously monitor circuit integrity.This design ensures that even if one channel fails,the backup channel maintains safety functionality,providing an unprecedented level of reliability in critical applications.

Innovation Point 2:EATON 8922-RB-IS​incorporates smart thermal management that adjusts power dissipation based on ambient temperature,preventing overheating while maintaining optimal performance.This innovation extends the module’s operational life in extreme environmental conditions.

Innovation Point 3:The integrated diagnostics provide real-time monitoring of field wiring conditions,detecting issues such as short circuits,open circuits,and ground faults before they compromise system safety.This proactive approach to maintenance significantly reduces downtime and improves overall system reliability.

Advanced energy limitation technology for intrinsic safety

Dual-channel redundancy with automatic failover

Smart thermal management system

Comprehensive diagnostic capabilities

Global safety certifications(ATEX,IECEx,UL)

Application Cases and Industry Value

In a major pharmaceutical manufacturing facility,the EATON 8922-RB-IS​was implemented to interface with solvent handling equipment in potentially explosive atmospheres.The system required reliable signal isolation between the DCS and field devices handling flammable solvents.After installing 45 units of 8922-RB-IS,the facility achieved full compliance with ATEX regulations while reducing interface costs by 25%compared to traditional isolation solutions.The maintenance supervisor noted:”The diagnostic capabilities of the 8922-RB-IS​have transformed our preventive maintenance program,allowing us to identify potential issues before they affect production.”

The value of EATON 8922-RB-IS​was further demonstrated in an oil refinery expansion project where the modules provided interface solutions for over 200 field devices.The project team reported a 40%reduction in installation time due to the modular design and clear labeling of the 8922-RB-IS​units.More importantly,the system achieved safety integrity level(SIL)2 certification without additional components,saving approximately$150,000 in certification costs.

Related Product Combination Solutions

The EATON 8922-RB-IS​integrates seamlessly with several complementary products including the EATON 8926-PS​power supply for consistent voltage regulation and the EATON 8932-DP​diagnostic panel for centralized monitoring.For complete system integration,the module works with EATON 8940-CP​communication processors for PROFIBUS PA networks and EATON 8950-GW​gateways for Foundation Fieldbus integration.The safety system can be enhanced with EATON 8960-AI​analog input modules and EATON 8970-DI​digital input modules for comprehensive signal handling.

Installation,Maintenance,and Full-Cycle Support

Proper installation of the EATON 8922-RB-IS​requires adherence to international standards for hazardous area equipment.The module must be mounted in a suitable enclosure with proper segregation between safe and hazardous area wiring.Grounding must comply with IEC 60079-14 requirements,with a dedicated ground connection of at least 4mm².Cable entries must maintain the integrity of the enclosure’s IP rating,using appropriate cable glands and sealing compounds.

Routine maintenance involves quarterly visual inspections and annual functional testing.The LED indicators provide immediate status information,while the built-in diagnostics can be accessed through the service interface.For fault finding,the 8922-RB-IS​provides detailed error codes that simplify troubleshooting.Module replacement requires de-energizing the system and following the documented safety procedures for hazardous area equipment.

Our technical support team provides comprehensive services including installation supervision,commissioning assistance,and maintenance training.We offer extended warranty options and 24/7 technical support for critical applications.All EATON 8922-RB-IS​modules are supplied with complete certification documents and installation manuals.

Contact us today to discuss your intrinsic safety requirements.Our application engineers will provide a customized solution based on your specific hazardous area classification and operational needs.

Bently Nevada | General Electric | Vibration Motors | ABB | Honeywell | Emerson | B&R | Yokogawa | Woodward | Schneider