KJ2221X1-EA1 | Emerson DeltaV SISNet Repeater Carrier

Overview

The Emerson KJ2221X1-EA1 serves as a SISNet Repeater Carrier within the DeltaV™ distributed control system. It is also commonly associated with the MQ Controller platform, acting as the physical carrier/base that enables stable signal transmission and deterministic control logic execution for safety and automation networks.

Technical Specifications

• Manufacturer: Emerson
• Model: KJ2221X1-EA1
• Also Known As: 12P3241X012
• Type: SISNet Repeater Carrier / MQ Controller Base
• Local Bus Power: 12.6 VDC at 8 A
• Connectors: One 3×16 Female Connector; One 3×16 Male Connector
• Weight: 0.45 kg

Environmental & Safety Ratings

• Operating Temperature: −40 °C to +70 °C
• Shock: 10 g, ½ sine wave for 11 ms
• Vibration: 1 mm p-p (2–13.2 Hz); 0.7 g (13.2–150 Hz)
• Relative Humidity: 5 % – 95 % non-condensing
• Airborne Contaminants: ISA-S71.04-1985 Class G3
• IP Rating: IP20

Key Features

• Repeater functionality extends SISNet communication reach
• 3×16 connectors provide robust backplane interfacing
• Rugged design for continuous operation in demanding process environments
• Compatible with DeltaV M-Series hardware and safety instrumented systems

FAQ

Q: Is this a controller or just a carrier?
A: The KJ2221X1-EA1 is physically a SISNet Repeater Carrier. It is frequently used as the mounting base for the MQ Controller module in DeltaV safety architectures.

Q: Can I install this with power on?
A: No. De-energize the LocalBus and field power before removing or inserting the carrier.

Q: What does the 3×16 connector interface with?
A: The male/female 3×16 connectors mate with corresponding backplane or interconnect cables within the DeltaV chassis assembly.

Installation Guidelines

1. Mount the carrier on a T-type DIN rail or in the designated DeltaV chassis slot.
2. Align the 3×16 male and female connectors with the mating backplane headers.
3. Press firmly until fully seated and verify mechanical retention.
4. Apply power only after all connections are confirmed secure.

Selection Tips

• Order KJ2221X1-EA1 when expanding or repairing a DeltaV SISNet repeater segment.
• Verify chassis/backplane compatibility for 3×16 connector pitch.
• Confirm whether your application requires the MQ Controller module to be mounted on this carrier.