Description
EMERSON DELTAV
12P3232X112
SIS NET REPEATER
KJ2221X1-BA1
REV.K
24 VDC 300mA
PMS001661
FISHER-ROSEMOUNT SYSTEMS
INPUT POWER RATING: 24VDC, 300mA MAX
AMBIENT TEMPERATURE: -40 TO 70C
The Emerson DeltaV KJ2221X1-BA1 SIS Net Repeater is a dedicated network signal repeater designed for use within DeltaV Safety Instrumented System (SIS) architectures. Its primary function is to extend and regenerate SIS network communications between safety controllers and field devices, ensuring signal integrity across the safety bus. As part of the PLC & HMI category, this component plays a critical role in maintaining reliable data transmission within safety-critical automation environments found on board modern vessels and offshore installations. The wide ambient temperature rating of -40°C to 70°C makes it well suited to the demanding thermal conditions encountered in marine and offshore machinery spaces.
Key Features
✓ Functions as a SIS network repeater within the Emerson DeltaV Safety Instrumented System platform, extending communication reach and maintaining signal quality across the safety network bus.
✓ Rated input power of 24VDC at 300mA maximum, with an operating ambient temperature range of -40°C to 70°C as stated on the nameplate — no additional electrical specifications are confirmed beyond what is provided.
✓ Compatible with Emerson DeltaV SIS controller architectures; specific panel, rack, or backplane compatibility should be verified against the installation drawings and system version prior to ordering, subject to confirmation.
✓ Suitable for installation in control rooms, automation cabinets, and equipment rooms where DeltaV SIS infrastructure is housed; mounting configuration and enclosure requirements depend on the vessel’s system layout.
✓ Replacement of this component should be coordinated with a review of SIS network topology and loop configuration to ensure continuity of safety function during and after maintenance — system bypass procedures may apply.
Marine Applications
✓ Safety instrumented systems (SIS) on LNG carriers, FPSOs, and offshore platforms where DeltaV-based emergency shutdown and process safety logic is deployed.
✓ Integrated automation and control systems on tankers and chemical carriers requiring reliable SIS network communication between safety controllers and field instrumentation.
✓ Machinery space automation on large commercial vessels where DeltaV PLC & HMI infrastructure governs critical process and safety functions.
✓ Offshore drilling units and semi-submersibles utilising Emerson DeltaV SIS architectures for well control, fire & gas, and process shutdown systems.
✓ Retrofit and upgrade projects on existing vessels transitioning to or expanding DeltaV SIS network infrastructure, where additional signal repeaters are required to maintain network performance.
Why Marine Engineers Choose
Marine engineers and automation superintendents specify the Emerson DeltaV SIS Net Repeater because it is a manufacturer-designated component engineered specifically for the DeltaV SIS platform, ensuring the network communication integrity on which safety system availability and functional safety performance depend.
Ideal For
LNG carriers, FPSOs, offshore platforms, chemical tankers, crude oil tankers, drilling vessels, and any commercial or offshore vessel operating Emerson DeltaV Safety Instrumented System infrastructure requiring network repeater support.
Technical Support & Compliance
Remote troubleshooting guidance, onboard commissioning support, and integration assistance for DeltaV SIS network configurations are available subject to confirmation of the vessel’s system architecture and software version. Pre-installation testing, replacement commissioning, and retrofit integration into existing SIS networks can be supported with appropriate documentation. To confirm compatibility and suitability for your installation, buyers are encouraged to share nameplate photographs, the full part number and revision, system drawings or network topology diagrams, the DeltaV system version in use, vessel name, IMO number, and the specific scope of the replacement or upgrade — all compatibility confirmations are subject to review of this information.
