Overview
The Emerson KJ3225X1-BA1, also cataloged as the KJ3225X1-BA1 RTD / Resistance Input Card, operates as a dedicated hardware component for resistance temperature signal acquisition within the Emerson DeltaV M-Series I/O system.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | KJ3225X1-BA1 |
| Brand | Emerson |
| Origin | Emerson DeltaV M-Series |
| Product Type | RTD / Resistance Input Cards |
| Input Function | RTD and resistance signal measurement |
| Local Bus Power | 12 VDC at 160 mA |
| Operating Temp | -40 deg C to +70 deg C |
| Shock Resistance | 10g 1/2 Sinewave for 11 msec |
| Vibration Resistance | 1 mm Peak to Peak from 2 to 13.2 Hz; 0.7g from 13.2 to 150 Hz |
| Airborne Contaminants | ISA-S71.04-1985 Class G3 |
| Relative Humidity | 5 to 95% non-condensing |
| Protection Rating | IP20 |
| Terminal Block Key Position | C3 |
| Hazardous Area Certification | II 3G Ex nA IIC Gc; II 3G Ex nL IIC |
| Certification References | FM12ATEX0090U; IECEx FMG 12.0035U; Nemko 02ATEX431U |
| Power Consumption | 12 VDC at 160 mA from Local Bus |
DeltaV RTD Signal Acquisition and Channel Isolation
The Emerson KJ3225X1-BA1 processes RTD and resistance input signals through the DeltaV M-Series I/O architecture. The card receives field measurement signals through compatible terminal blocks and transfers processed values through the Local Bus interface.
Furthermore, the module supports channel-level measurement integrity through controlled input processing. The design applies to temperature sensing circuits that require stable resistance measurement, signal conditioning, and deterministic communication with DeltaV controllers.
Frequently Asked Questions
Q: Can the KJ3225X1-BA1 be removed or inserted while system power is active?
A: The unit cannot be removed or inserted with system power energized unless the installation area is confirmed as non-hazardous. Only one unit may be removed or inserted at a time.
Q: Does the KJ3225X1-BA1 require user calibration?
A: No. The module contains no user-adjustable calibration functions and does not require field calibration.
Q: How does the terminal block compatibility system operate?
A: The rotary keying system matches the I/O card with the correct terminal block configuration after installation, preventing incompatible module and terminal block combinations.
Field Installation Guidelines
Install the KJ3225X1-BA1 according to DeltaV M-Series hardware installation procedures and hazardous area requirements.
- Verify that the terminal block key position matches the C3 configuration before installation.
- Complete an I/O loop assessment for all energy-limited nodes when applying nL installation methods.
- Route RTD and resistance signal wiring separately from high-energy power cables to reduce electrical interference.
- Connect cable shields according to site grounding practices and maintain proper instrument grounding paths.
- Confirm hazardous area classification before inserting or removing the module.
- Do not disassemble the module because it contains no user-serviceable parts.
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