Overview
Configured for thermocouple and millivolt signal acquisition in the DeltaV system, the Emerson KJ3002X1-BG2 (KJ3002X1-BG2 Thermocouple, mV Card) provides direct physical and electrical execution for temperature and low-level voltage input measurement.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | KJ3002X1-BG2 |
| Brand | Emerson |
| Origin | USA |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | LocalBus power rating: 12 VDC at 350 mA |
| Product Type | Thermocouple, mV Input Card |
| System Platform | Emerson DeltaV Scalable Process System |
| Hazardous Atmosphere Certification | II 3 G; Nemko No. 02ATEX431U; EEx nL IIC T4 |
| LocalBus Power Supply | 12 VDC at 350 mA |
| Field Circuit Rating | 5.5 VDC at 0.6 mA/channel |
| Terminal Block Key Position | B2 |
| Environmental Rating | ISA-S71.04-1985 Airborne Contaminants Class G3; IP20 |
| Relative Humidity | 5 to 95% non-condensing |
| Shock Resistance | 10 g half sinewave for 11 msec |
| Vibration Resistance | 1 mm peak to peak from 5 to 16 Hz; 0.5 g from 16 to 150 Hz |
Cold Junction Compensation and Field Signal Processing
The KJ3002X1-BG2 processes thermocouple and millivolt input signals through the DeltaV I/O architecture. The card performs analog signal conversion for temperature measurement loops and low-voltage field inputs. Furthermore, the module design supports channel-level signal handling for industrial measurement applications.
The module applies cold junction compensation (CJC) methods for thermocouple measurement accuracy within supported DeltaV configurations. Additionally, the input circuitry maintains defined field circuit power limits to control connected sensor loading.
Frequently Asked Questions
Q: Can the KJ3002X1-BG2 be removed while field power remains energized?
A: No. Field power supplied through the field terminal or carrier must be removed before removing or connecting the device.
Q: Does the KJ3002X1-BG2 require user calibration?
A: No. The unit does not require calibration and contains no user serviceable parts.
Q: What terminal block compatibility method does this module use?
A: The module uses a rotary keying system. The terminal block key position must match the I/O card configuration before installation.
Field Installation Guidelines
Install the KJ3002X1-BG2 according to Emerson DeltaV Zone 2 installation requirements. Before replacement or insertion, disconnect field circuit power to prevent electrical hazards.
Verify that the installed terminal block uses the correct key position B2. In addition, confirm wiring connections against the module wiring diagram located on the card side.
Route thermocouple wiring separately from high-current power cables to reduce electrical interference. Maintain proper shield termination practices according to the plant grounding standard. Avoid unnecessary cable loops and maintain secure terminal connections during commissioning.
The module contains no adjustable components. Therefore, maintenance activities should only include inspection, replacement, and verification of external wiring conditions.
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