KJ2221X1-BA1 Emerson SISNet Repeater Module

Hardware Specifications

SISNet Communication and Electrical Interface

The KJ2221X1-BA1 repeats SISNet communication signals between connected network segments. Therefore, the module supports physical network extension where the application requires additional communication distance or segment separation.

The module operates from a 24 VDC supply and draws up to 300 mA. Consequently, the maximum calculated DC input power is 7.2 W under the stated maximum current condition.

The module also supports operation across an industrial temperature range of -40 deg C to +70 deg C. In addition, its environmental specification includes 5% to 95% relative humidity without condensation.

For installation, maintain suitable separation between communication wiring and high-energy power conductors. Where shielded communication cable is specified by the system design, terminate the shield according to the DeltaV SIS installation standard rather than creating uncontrolled ground paths.

Frequently Asked Questions

Q: What power supply does the KJ2221X1-BA1 require?
A: The supplied specification identifies a 24 VDC operating voltage with a maximum current consumption of 300 mA.

Q: What is the maximum calculated power consumption?
A: At 24 VDC and the stated maximum current of 300 mA, the calculated input power is 7.2 W.

Q: Can the module operate in high-temperature industrial environments?
A: Yes. The specified operating temperature range is -40 deg C to +70 deg C. The installation must also control humidity and condensation within the stated environmental limits.

Field Installation Guidelines

1. Verify the module identification and wiring assignment before applying power.
2. Confirm that the supply provides 24 VDC and that the available current capacity exceeds the module load.
3. Install communication wiring separately from high-voltage and high-current conductors to reduce electromagnetic interference.
4. Follow the DeltaV SIS wiring architecture for cable routing, shielding, and grounding.
5. Avoid unintended shield-to-ground connections that can introduce ground-loop currents.
6. Secure all field wiring and connectors to prevent mechanical movement during vibration.
7. Confirm that the installation environment remains within -40 deg C to +70 deg C and 5% to 95% non-condensing humidity.
8. Before commissioning, verify SISNet communication continuity and confirm correct segment operation.
9. For hazardous-area installations, apply the applicable ATEX, IECEx, or UL/cUL Class I Div 2 installation requirements.

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