Emerson DeltaV KJ2221X1-BA1 SISNET Repeater

Emerson DeltaV KJ2221X1-BA1 SISNET Repeater Module

Product Introduction

The KJ2221X1-BA1 is a high-performance repeater module from Emerson’s DeltaV series. It supports SISNET and local bus power distribution. Many plants choose this module for safety instrumented systems. Its design ensures stable signal repeating across long distances. Additionally, it handles extreme temperatures from -40°C to +70°C. You can rely on this module for continuous operation in demanding automation tasks.

Technical Specifications

The KJ2221X1-BA1 requires a 24 VDC power supply. Its maximum current draw is 300 mA. This repeater module supports SISNET communication protocols. Local bus power output is also 24 VDC at 300 mA max. Consequently, it matches the input requirements perfectly.

Key electrical parameters include:

• Operating Voltage: 24 VDC nominal

• Current Consumption: 300 mA maximum

• Local Bus Power Output: 24 VDC at 300 mA

• Protocol Support: SISNET and DeltaV local bus

Furthermore, the module provides reliable signal regeneration. It eliminates noise and distortion over long cable runs. For complex I/O networks, this feature is critical.

Mechanical and Environmental Ratings

This repeater module withstands severe conditions. Its ambient temperature range is -40°C to +70°C. Therefore, it works in both cold storage and hot process areas.

Mechanical robustness includes:

• Shock resistance: 10g ½ sine wave for 11 msec

• Vibration tolerance: 1 mm peak-to-peak from 2 to 13.2 Hz; 0.7g from 13.2 to 150 Hz

• Airborne contaminants: ISA-S71.04-1985 Class G3 (harsh environments)

• Relative humidity: 5% to 95% non-condensing

Additionally, the module has no moving parts. This improves long-term reliability. Meanwhile, the G3 rating means it resists corrosive gases. Many chemical plants benefit from this feature.

Installation Guidelines

Install the KJ2221X1-BA1 inside a DeltaV chassis. First, ensure the backplane supports SISNET modules. Next, insert the repeater module firmly into the designated slot. Then secure it with the locking mechanism.

Important installation notes:

• Use only 24 VDC power from a regulated supply

• Maintain proper grounding for noise immunity

• Keep cables away from high-voltage lines

• Do not exceed 300 mA total load per module

Moreover, allow adequate ventilation around the module. Although it runs cool, spacing helps in high-density racks. For best results, follow Emerson’s DeltaV mounting guide.

Common Applications

You typically find the KJ2221X1-BA1 in:

• Safety instrumented systems (SIS)

• Remote I/O racks

• Distributed control systems (DCS)

• Long-distance SISNET segments

Specifically, it repeats SISNET signals between DeltaV controllers and I/O cards. Therefore, signal strength stays high even over 100 meters. Many refineries and power plants use this module daily.

Packaging List

• 1 x KJ2221X1-BA1 Repeater Module

• 1 x anti-static protective bag

• 1 x quick installation guide (paper copy)

• 2 x mounting clips (pre-installed)

Note: No certificates or warranty documents are included in this package.

Shipping Information

We ship worldwide using FedEx, UPS, or DHL. All modules are packed with anti-static and shock-absorbing materials. Tracking numbers are provided within 24 hours.

Frequently Asked Questions (FAQ)

1. Can the KJ2221X1-BA1 work with non-DeltaV systems?
No. This KJ2221X1-BA1 is specifically designed for Emerson DeltaV systems with SISNET. It may not function correctly with other brands.

2. What happens if I exceed 300 mA on the local bus?
The module may overheat or trigger a protection shutdown. Always calculate total load before installation.

3. Does this repeater module need any configuration software?
No. The KJ2221X1-BA1 is plug-and-play for DeltaV backplanes. It requires no user programming or firmware updates.

4. How many repeaters can be used in one SISNET segment?
Emerson recommends up to 4 repeaters per segment. However, always refer to your system’s engineering guide for exact limits.

5. Is the module suitable for outdoor enclosures?
Yes, if the enclosure maintains -40°C to +70°C and G3 contaminant protection. The module itself is not weather-sealed, so use an IP54 or higher cabinet outdoors.