8-Channel Thermocouple Input Module Emerson KJ3002X1-BG2
Manufacturer: Emerson
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Part Number: 12P1731X072
Condition：New with Original Package
Product Type: Thermocouple Input Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Emerson KJ3002X1-BG2 DeltaV Thermocouple Module
The Emerson KJ3002X1-BG2, also cataloged as the KJ3002X1-BG2 Thermocouple/mV Analog Input Module, operates as a dedicated hardware component for temperature and low-level voltage signal acquisition within Emerson DeltaV DCS platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | KJ3002X1-BG2 |
| Brand | Emerson |
| Origin | USA |
| Weight | 0.18 kg |
| Dimensions | 51 x 102 x 102 mm |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | LocalBus: 12 VDC at 150 mA |
| Input Channels | 8 isolated analog input channels |
| Supported Signal Types | Thermocouples (Types J, K, T, E, R, S, B, N) and mV signals |
| Input Range | -10 mV to +75 mV |
| Field Power Rating | Bussed Field Power: 12 VDC at 300 mA; Field Circuit: 24 VDC at 32 mA |
| Relative Humidity | 5% to 95% non-condensing |
| Shock & Vibration Limits | Shock: 10 g half-sine wave for 11 ms; Vibration: 1 mm peak-to-peak (2-13.2 Hz), 0.7 g (13.2-150 Hz) |
| System Compatibility | DeltaV M-series I/O subsystem |
| Hazardous Location Ratings | CE, UL, ATEX II 3 G, IECEx, Class I Div 2 Groups A-D (Zone 2 / EEx nL IIC T4) |
Process Control & Cold Junction Compensation
The KJ3002X1-BG2 module provides channel-to-channel isolation to eliminate ground loop currents and minimize common-mode noise across industrial sensor leads. The hardware features integrated cold junction compensation (CJC) algorithms matched to external terminal block temperature sensors, ensuring millivolt-to-temperature linearization for thermocouple types J, K, T, E, R, S, B, and N. Designed for continuous analog signal digitization, the card offloads thermocouple scaling tasks from the central controller backplane.
Frequently Asked Questions
Q: Does the KJ3002X1-BG2 module support online module removal and insertion (hot-swapping)?
A: Yes, the module supports hot-swapping when seated on compatible DeltaV I/O terminal carriers, allowing live hardware maintenance without interrupting backplane power to adjacent I/O cards.
Q: How does the module handle cold junction compensation for thermocouple field wiring?
A: Cold junction compensation is performed by CJC temperature sensors built into the mating DeltaV terminal blocks, which pass ambient reference voltage signals directly to the input digitizer.
Q: What are the input voltage boundaries when measuring raw millivolt sources?
A: The millivolt measurement interface accepts direct DC signals within the -10 mV to +75 mV range, maintaining high-resolution A/D conversion across all 8 channels.
Field Installation Guidelines
Mount the module directly onto the designated DeltaV M-series I/O carrier slot, ensuring the mechanical keying pins line up with the terminal block configuration. Route thermocouple extension wires through dedicated wiring trays, keeping signal lines physically separated from high-voltage AC power conductors. Ensure shield drain wires are terminated to the designated ground bus at a single point to prevent ground loops. For installations in Class I, Division 2 or Zone 2 hazardous locations, verify that all field wiring conforms to local intrinsic safety and non-incendive field wiring codes before applying system power.