KJ3221X1-BA1 Emerson

KJ3221X1-BA1 Emerson Termination Unit

Product  Description：

Emerson Termination Units (TUs) are critical hardware components designed for use with DeltaV and Ovation distributed control systems (DCS). They provide the physical interface point where field wiring—originating from sensors, transmitters, and actuators—connects to the system's I/O modules. These units act as a rugged transition layer, ensuring that electrical signals are safely and cleanly passed from the harsh industrial field environment to the sensitive control electronics.

Product Parameters

The technical profile of an Emerson Termination Unit is built to support high-density industrial connectivity:

• Module Compatibility: Designed to host specific I/O types, including Discrete, Analog (HART-enabled), Isolated, and Thermocouple/RTD inputs.

• Mounting Options: Standard support for DIN rail mounting or specialized carrier backplanes for vertical and horizontal orientations.

• Signal Density: Available in various configurations, commonly supporting 8-channel, 16-channel, or 32-channel I/O blocks.

• Voltage Ratings: Standard units handle 24V DC, while specialized versions are rated for 120/230V AC or low-voltage millivolt signals.

• Termination Style: Equipped with screw terminals or spring-clamp terminals to accommodate wire sizes ranging from 24 AWG to 12 AWG.

• Ambient Temperature: Rated for operation in environments ranging from -40°C to 70°C, supporting installation in remote locations.

Product Advantages

Emerson Termination Units are engineered to simplify installation and maximize system uptime:

• Hot-Swappable Design: The separation of the termination unit from the I/O module allows users to replace electronic modules without disconnecting any field wiring, significantly reducing maintenance time.

• Integrated Fusing and Protection: Many Emerson TUs feature built-in fuses per channel or per block, protecting the internal system components from field-side electrical faults.

• Reduced Wiring Complexity: By providing organized, labeled terminal points, these units eliminate the need for intermediate marshaling panels, saving cabinet space and reducing potential points of failure.

• Robust Signal Integrity: Designed with high-quality materials to minimize contact resistance and provide reliable shielding against electromagnetic interference (EMI).

• Passive Architecture: Because they are primarily passive components, the termination units themselves have an extremely high Mean Time Between Failures (MTBF), ensuring long-term system stability.

Product Applications

These units are foundational in large-scale process automation industries:

• Oil and Gas: Used in offshore platforms and refineries to connect pressure and flow transmitters to the central DeltaV system.

• Chemical Processing: Interfacing with temperature sensors and control valves in environments where chemical resistance and signal isolation are required.

• Power Generation: Managing high-density I/O for boiler control, turbine monitoring, and auxiliary plant systems in Ovation-controlled facilities.

• Pharmaceutical Manufacturing: Providing the precision and clean signal paths necessary for batch processing and regulatory-compliant data logging.

• Water and Wastewater: Handling distributed I/O across large treatment plants, facilitating remote monitoring of pumps and level sensors.

Important Precautions

To ensure safety and optimal performance, the following guidelines must be followed:

• Torque Specifications: When using screw-terminal units, ensure that terminal screws are tightened to the manufacturer's specified torque. Over-tightening can damage the terminal, while under-tightening can lead to intermittent signals.

• Keying Integrity: Ensure that the mechanical keys on the termination unit match the intended I/O module. Forcing an incompatible module onto a TU can cause permanent hardware damage.

• Wiring Segregation: Maintain clear separation between AC power wiring and low-voltage DC or analog signal wiring to prevent crosstalk and electrical noise interference.

• Grounding Practices: Ensure the carrier or DIN rail is properly bonded to the system's functional earth. Improper grounding can lead to errors in sensitive analog measurements, particularly with thermocouples.

• Fuse Replacement: Only use fuses of the exact rating and type specified by Emerson. Installing an incorrect fuse may bypass the protection circuit and lead to a fire hazard or module destruction.

The structure and details of the product：

Our services：

Shipping Port:  China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

Warranty: one year

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Our main products include DCS control system spare parts, PLC system spare parts, and robot system spare parts. Our advantageous brands include Allen Bradley, Bently Nevada, ABB, HIMA, Reliance, Bender, National Instruments, Emerson Ovation, Honeywell, Siemens, Allen Bradley, ICS Triplex, FOXBORO, Schneider, GE Fanuc, Motorola, HIMA, Prosoft, and other imported industrial components. Our main products serve a wide range of electronic, metallurgical, chemical, and power plants Industries such as steel mills, rubber, cement, machinery and equipment, and construction.