Description
Product Description
Overview
The Emerson KJ3221X1-EA1 is a high-precision S-series 10-pin Isolated Terminal Block within the DeltaV Distributed Control System (DCS). It provides a secure interface between field wiring and S-series I/O modules, ensuring electrical isolation, signal integrity, and robust connection reliability.
This terminal block is specifically designed to snap onto S-series interface carriers, offering a modular solution for connecting process signals such as 4–20 mA loops, RTDs, or discrete digital inputs.
Key Features and Advantages
Individual Channel Isolation
The EA1 variant provides full channel-to-channel and channel-to-ground isolation, preventing ground loops and minimizing noise interference. This ensures accurate signal transmission in electrically challenging industrial environments.
Modular and User-Friendly
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Pre-Wiring Capability: Field connections can be completed and tested before I/O modules are installed.
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Independent Replacement: I/O modules can be swapped without disturbing existing wiring.
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Mechanical Keying: Prevents incorrect module-to-terminal block pairing, reducing the risk of installation errors.
Durable Industrial Construction
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Screw Terminals: Securely fasten wires to resist vibration and maintain long-term electrical contact.
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Conformal Coating: Provides corrosion resistance and protection from dust, moisture, and other airborne contaminants.
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High-Density Design: Slim profile allows maximum I/O density within a control cabinet.
Environmental and Safety Compliance
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Operating Temperature: -40°C to +70°C
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Shock: 10g, half-sine wave, 11 ms
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Vibration: 1 mm peak-to-peak 2–13.2 Hz; 0.7 g 13.2–150 Hz
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Airborne Contaminants: ISA-S71.04 Class G3
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Relative Humidity: 5–95%, non-condensing
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Hazardous Area Rating: Class 1 Div 2 / ATEX Zone 2
Technical Specifications
| Feature |
Specification |
| Model Number |
KJ3221X1-EA1 |
| Terminal Type |
Screw Terminals, 10-pin |
| Mounting |
Snaps onto S-Series I/O Interface Carriers |
| Isolation |
Channel-to-channel and channel-to-ground |
| Wire Gauge Supported |
12–24 AWG |
| Input Power |
30 VDC @ 0.2 A |
| Environmental Compliance |
ATEX Zone 2, Class 1 Div 2, ISA-S71.04 Class G3 |
| Operating Temperature |
-40°C to +70°C (-40°F to 158°F) |
| Shock and Vibration |
10g shock, 1 mm peak-to-peak 2–13.2 Hz, 0.7 g 13.2–150 Hz |
Application Notes
The KJ3221X1-EA1 is ideal for secure termination of analog and discrete process signals in dense control cabinet layouts. It is compatible with S-series interface carriers like the KJ3241X1 and provides reliable isolation for signal accuracy in chemical, power, and process industries.
