The Emerson KJ2221X1-EA1 is a DeltaV SISNet repeater module used in DeltaV SIS (safety instrumented system) architectures to link SISNet safety network segments between logic solvers across the plant. This model is discontinued by the manufacturer; stock units serve as direct replacements in existing DeltaV SIS installations.
Technical Specifications
Manufacturer
Emerson
System
DeltaV SIS
Type
SISNet Repeater Module
Lifecycle Status
Discontinued by manufacturer
Eligible for next day delivery
Orders placed before 4 PM ET ship same day for rapid replacement, minimizing downtime.
All products are covered by Industrial Automation Co.'s 2-Year Warranty.
Condition
SKU
Price
Warranty
Availability
Quantity
Purchase
New Surplus
KJ2221X1-EA1-NS
€340,95 EUR
2 Year Extended Warranty
1 In Stock in the United States!
Extend your warranty coverage at checkout2 yrs included free
Pricing for this item — you’ll pick a term on the checkout page.
Extended plans are available at checkout on items $200 and up.
+1 yr → 3 total$51/yr€51,14 · thru 2029
+3 yrs → 5 total$45/yr€136,38 · thru 2031
+5 yrs → 7 total$34/yr€170,47 · thru 2033
BEST VALUE+8 yrs → 10 total$26/yr€204,57 · thru 2036
Full defect protection · free RMA evaluation & repair · same‑day replacement when in stock
Description
The Emerson KJ2221X1-EA1 is a DeltaV SISNet repeater module used in DeltaV SIS (safety instrumented system) architectures to link SISNet safety network segments between logic solvers across the plant. This model is discontinued by the manufacturer; stock units serve as direct replacements in existing DeltaV SIS installations.
Technical Specifications
Manufacturer
Emerson
System
DeltaV SIS
Type
SISNet Repeater Module
Lifecycle Status
Discontinued by manufacturer
Specifications
Emerson DeltaV MQ Controller Research
M-Series Hardware
DeltaV MQ Controller
KJ2221X1-EA1
The redundant, deterministic brain of the plant. It handles logic execution and I/O management with millisecond precision, ensuring zero downtime in critical process industries.
1. Native Redundancy
The MQ controller operates in a 1:1 pair. The Active unit controls the plant, while the Standby unit shadows every move, ready to take over instantly.
Primary (Active)
PWR
ACT
I/O BUS
Secondary (Standby)
PWR
STBY
I/O BUS
FIELD SENSORS (CHARMs)
2. The Scan Cycle (Deterministic)
STEP 1
Read Inputs
Collects data from pressure, temp, and flow sensors.
STEP 2
Execute Logic
Runs PID loops, interlocks, and calculations.
STEP 3
Write Outputs
Sends commands to valves, pumps, and motors.
STEP 4
Communicate
Syncs with Backup Unit and Control Room HMI.
3. Technical Specifications
Processing Capacity
Device Signal Tags (DST)750 DST
User Memory48 MB
Feature
Specification
Mounting
2-wide / 4-wide / 8-wide Carrier
Input Power
24 VDC (Nominal)
Operating Temp
-40°C to 70°C
Communication
Redundant Ethernet I/O Bus
FR
France
Sep 07, 2026 03:54
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Emerson DeltaV KJ2221X1-EA1
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Technical Support
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Industrial Automation Co. is a premier supplier of replacement and aftermarket industrial components. In addition to the DeltaV, we offer hundreds of Emerson parts available now in our warehouse. Most of our automation components ship on the same day and are covered by our two-year service warranty. Contact us to order your Emerson replacement parts today.