Model: KJ2221X1-BA1
Brand: Emerson (DeltaV)
Series: DeltaV SIS (Safety Instrumented System)
Core Function: SISNet Repeater Module that regenerates and extends SISNET local bus communication signals in Emerson DeltaV Safety Instrumented Systems. Ensures reliable data transmission over longer distances and improves signal integrity in safety-critical networks.
HS Code: 8517.62 / 8538.90 (Machines for the reception, conversion and transmission of data / Parts suitable for electrical control apparatus)
Product Parameters
| Parameter | Specification |
|---|---|
| Product Type | SISNet Repeater Module |
| System Compatibility | Emerson DeltaV SIS |
| Local Bus Power | 24 VDC at 300 mA (maximum) |
| Ambient Temperature | –40 °C to +70 °C |
| Storage Temperature | –40 °C to +85 °C (typical) |
| Shock | 10 g ½ sinewave for 11 ms |
| Vibration | 1 mm peak-to-peak (2–13.2 Hz); 0.7 g (13.2–150 Hz) |
| Airborne Contaminants | ISA-S71.04-1985 Class G3 |
| Relative Humidity | 5 % to 95 % non-condensing |
| Protection Rating | IP20 (cabinet installation) |
| Function | Signal regeneration and distance extension for SISNET local bus |
Advantages and Features
- Extends the reach of SISNET communication in DeltaV SIS systems
- Regenerates signals to maintain integrity over longer cable runs
- Designed specifically for safety instrumented system applications
- Wide operating temperature range for harsh industrial environments
- High resistance to shock, vibration, and airborne contaminants (Class G3)
- Compact module for easy integration into DeltaV carriers
- Supports reliable communication in SIL-rated safety architectures
- Robust construction for continuous operation in process industries
Application Cases in Application Fields
- Extension of SISNET local bus in DeltaV Safety Instrumented Systems
- Safety-critical communication in oil & gas, refining, and petrochemical plants
- Emergency shutdown (ESD) and fire & gas (F&G) systems
- Long-distance or multi-cabinet DeltaV SIS installations
- Process plants requiring high-integrity safety network communication
- Systems where signal regeneration is needed due to cable length or noise
- Expansion or retrofit of existing DeltaV SIS networks
Comparisons with Competing Products
| Aspect | Emerson KJ2221X1-BA1 | Standard Network Repeaters | Fiber Media Converters |
|---|---|---|---|
| System Specific | DeltaV SIS optimized | Generic | Generic / multi-protocol |
| Safety Focus | SISNET / SIL applications | General industrial | Varies |
| Signal Type | SISNET local bus | Ethernet / fieldbus | Optical conversion |
| Environmental Rating | Class G3, wide temp | Varies | Varies |
| Best For | DeltaV SIS distance extension | General networking | Long-haul optical links |
Selection Suggestions and Precautions
Selection Suggestions:
- Confirm the system is DeltaV SIS and requires SISNET bus extension.
- Verify power availability (24 VDC local bus, max 300 mA).
- Check overall network topology and maximum allowable cable lengths.
- Ensure compatibility with existing DeltaV SIS carriers and modules.
- Use genuine Emerson termination and carrier components.
Precautions:
- Install only in approved DeltaV SIS configurations.
- Follow Emerson guidelines for hazardous area installation if applicable (Zone 2 / Division 2).
- Do not exceed environmental limits (temperature, vibration, contaminants).
- Proper grounding and shielding are essential for signal integrity.
- Hot-swap rules and power sequencing must be observed according to DeltaV documentation.
- This is a safety-related communication component — incorrect installation can affect SIS performance.
Recent Popular Same-Brand / Related Models
- KJ2221X1-EA1 — SIS Net Repeater Carrier
- KJ2222X1-BA1 — SIS Net Distance Extender
- KJ2201X1-BA1 — SLS 1508 Logic Solver
- Other DeltaV SIS I/O and communication modules
- DeltaV M-series and S-series carriers and power supplies
- Related safety system accessories (terminal blocks, relays, etc.)
