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Product Introduction
The Emerson KJ3221X1-EA1 Redundant AO Terminal Block is a high-performance, redundant Analog Output (AO) terminal block designed for use with Emerson’s DeltaV™ Distributed Control System (DCS). It is engineered for mission-critical industrial automation applications that require the highest levels of reliability, safety, and signal integrity. This terminal block is part of the DeltaV system’s I/O redundancy strategy, offering enhanced fault tolerance by enabling dual AO channels to operate simultaneously or switch over seamlessly in case of primary channel failure.
Emerson’s KJ3221X1-EA1 terminal block ensures optimal signal distribution and robust wiring for analog output signals, typically used to control actuators, valves, or variable speed drives in process environments. The redundant design reduces downtime risk and enables continuous operation, which is crucial for industries like oil & gas, power generation, petrochemical, and water treatment.
Product Specifications
| Parameter | Details |
|---|---|
| Model | KJ3221X1-EA1 |
| Type | Redundant Analog Output Terminal Block |
| Function | Supports redundant AO channels |
| System Compatibility | Emerson DeltaV™ DCS System |
| Signal Type | Analog (typically 4-20 mA) |
| Redundancy Support | Yes (dual-channel AO redundancy) |
| Wiring | Screw-clamp terminal connections |
| Operating Temperature | -40°C to +70°C |
| Humidity Range | 5% to 95% non-condensing |
| EMC Compliance | Meets IEC and CE requirements |
| Mounting Type | DIN rail mounting |
| Material | High-impact industrial-grade plastic |
| Dimensions (L x W x H) | 114 x 38 x 120 mm |
| Weight | 0.3 kg |
| Certifications | CE, RoHS, ATEX (depending on application) |
| Life Cycle | Long-term availability in process industries |
Applications
The Emerson KJ3221X1-EA1 terminal block is widely used in process control and industrial automation environments where high reliability and redundancy are vital. Its typical applications include:
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Oil and Gas Processing Facilities – For controlling pumps, actuators, and valves under harsh field conditions.
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Petrochemical Plants – Ensures continuous analog signal output for process-critical tasks.
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Power Generation Units – Delivers redundant AO signals to manage turbines and energy control systems.
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Water and Wastewater Treatment Plants – Controls output to flow meters and chemical dosing equipment.
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Pharmaceutical Manufacturing – Maintains precision in batch process controls.
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Pulp and Paper Industry – Manages analog control of mechanical processing stages.
Product Advantages
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High Reliability: Supports dual-channel analog output redundancy, ensuring no single point of failure.
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System Integration: Seamlessly integrates with Emerson’s DeltaV™ system, reducing setup and maintenance effort.
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Compact Design: Saves panel space with a DIN-rail mountable compact form factor.
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Durability: Withstands harsh environments and industrial-grade EMI.
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Reduced Downtime: Hot-swappable design minimizes interruption during maintenance or replacement.
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Easy Maintenance: Simplified wiring access and clear labeling for technician efficiency.
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Standard Compliance: Adheres to global industry standards for safety and electromagnetic compatibility.
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Long Lifecycle: Backed by Emerson’s long-term product support strategy for legacy and current DeltaV installations.
Frequently Asked Questions (FAQ)
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What is the primary function of the KJ3221X1-EA1 terminal block?
It provides redundant analog output (AO) signal wiring for Emerson’s DeltaV DCS system. -
Is this terminal block hot-swappable?
Yes, it supports hot-swapping during live operation without shutting down the system. -
Which DeltaV components does it connect to?
It interfaces with redundant AO cards within the DeltaV system’s I/O subsystem. -
Does it support HART communication?
While the terminal block itself is passive, it supports HART pass-through if the connected AO card supports HART. -
What kind of wiring is supported?
It uses screw-clamp terminals for secure field wiring of AO signals. -
Can it be used in hazardous environments?
Yes, when paired with appropriately certified DeltaV modules and enclosures, it is suitable for ATEX and IECEx zones. -
How do I know if redundancy is active?
Redundancy status is monitored by the DeltaV controller and reported through the system interface. -
Is there any specific maintenance required?
Occasional tightening of terminal screws and visual inspection is recommended as part of routine maintenance. -
What kind of signal is transmitted through this block?
Typically, a 4-20 mA analog output signal is passed through to field devices. -
Is it backward-compatible with older DeltaV systems?
Yes, it is designed for compatibility with legacy and current DeltaV architectures.
Related or Same Series Emerson Models
| Model | Description | Function |
|---|---|---|
| KJ3222X1-BA1 | Redundant AI Terminal Block | Analog Input Redundancy |
| KJ3241X1-BA1 | Non-Redundant AO Terminal Block | Standard Analog Output |
| KJ3001X1-BB1 | Field Termination Assembly for AO | AO Termination Base |
| KJ3224X1-BA1 | Redundant DI Terminal Block | Digital Input Redundancy |
| KJ3204X1-BK1 | 4-Channel AO Module | Analog Output Module |
| KJ4001X1-CA1 | 8-Channel AO Redundant Card | I/O Signal Output with Redundancy |
Popular Emerson Models
| Model | Description | Category |
|---|---|---|
| KJ2003X1-BB1 | DeltaV Controller Baseplate | DCS Control |
| KJ4001X1-NA1 | Analog Input Module | Analog Input |
| KJ3001X1-BE1 | Field Termination Assembly | Terminal Base |
| VE4003S2T2B1 | DeltaV Smart HART I/O Card | HART Analog I/O |
| KJ1501X1-BB1 | DeltaV Power Supply Module | Power Supply |
| VE5009S1 | DeltaV System Power Controller | System Management |
