Emerson KJ2221X1-BA1 is a SIS Net Repeater for DeltaV SIS, designed to extend the transmission distance of safety-related communication networks. It maintains signal integrity, resists industrial interference, and ensures stable data transmission between SIS components.
Manufacturer: Emerson Process Management (Austin, Texas)
Serial Number & Manufacturing Details: Refer to the product label for serial number, manufacturing location, and manufacturing date
Product Overview
The KJ2221X1-BA1 is a SISNet Repeater designed for hazardous industrial environments, dedicated to extending the transmission distance and enhancing signal stability of Safety Instrumented System (SIS) networks (SISNet). It ensures reliable data communication between SIS components (e.g., logic solvers, sensors, actuators) in critical process control scenarios—ideal for oil & gas, chemical, and pharmaceutical facilities. It complies with strict hazardous area safety standards, supporting uninterrupted SIS network operation in explosive atmospheres.
Environmental Specifications
Environmental Parameter
Specification
Ambient Temperature
-40°C to 70°C
Shock
10 G ½-sinewave for 11 ms
Vibration
1 mm peak-to-peak from 5 Hz to 16 Hz; 0.5 g from 16 Hz to 150 Hz
Airborne Contaminants
ISA-S71.04 –1985 Airborne Contaminants Class G3
Relative Humidity
5% to 95% non-condensing
Technical Description of KJ2221X1-BA1 SISNet Repeater
1. Product Overview
The KJ2221X1-BA1 is a SISNet Repeater developed by Emerson Process Management, specifically engineered for use in Safety Instrumented Systems (SIS) and industrial automation environments—including hazardous areas. Its core function is to amplify and extend SISNet communications signals, ensuring reliable data transmission between SIS components (e.g., controllers, I/O modules, safety sensors) over longer distances or across complex networks. With robust hazardous area certifications (ATEX, FM) and wide environmental tolerance, this repeater is critical for maintaining signal integrity in safety-critical applications such as oil and gas, chemical processing, and petrochemical plants, where communication failures could lead to process shutdowns or safety risks.
2. Installation & Operational Requirements
2.1 Power & Handling Safety
Powered Removal/Insertion: Strictly prohibited—the unit cannot be removed or inserted while system power is energized. This prevents electrical arcing (a critical hazard in explosive atmospheres) and damage to the repeater or SIS network.
Wiring Guidelines: Refer to Emerson’s DeltaV™ Scalable Process System Zone 2 Installation Instructions (Document 12P2046) for hazardous area wiring practices (e.g., cable shielding, conduit requirements) to maintain safety certifications.
2.2 Integration with SIS
System Compatibility: Optimized for DeltaV Safety Instrumented Systems (SIS); follow Installing Your DeltaV™ Safety Instrumented System Hardware for integration steps, including network addressing and signal termination.
Mounting: Intended for installation in industrial control cabinets (compatible with standard 19-inch racks) to protect against physical damage and environmental hazards. Ensure cabinet ventilation to maintain ambient temperature within -40 to 70°C.
3. Maintenance & Service
No User-Serviceable Components: The KJ2221X1-BA1 contains no parts that can be serviced, adjusted, or replaced by the user. Disassembly will void ATEX/FM certifications and may render the unit inoperable.
Calibration: Factory-calibrated for optimal signal amplification; no periodic calibration is required under normal operating conditions.
Traceability: Serial number, manufacturing location, and production date are printed on the product label for warranty tracking and regulatory compliance.
Safety Warnings
Ensure the input power strictly complies with 24 VDC (max 300 mA) to avoid overheating, circuit damage, or fire risks in hazardous environments.
Adhere to all SIS network wiring standards during installation to maintain signal integrity and prevent communication failures that could compromise safety functions.
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