Emerson KJ3221X1-BA2 DeltaV Series 2 Analog Output Module
The Emerson KJ3221X1-BA2 (Spare Part Number 13P0125X012) is an 8-channel analog output module engineered for the DeltaV Series 2 distributed control system. It converts digital controller instructions into 8 isolated 4-20 mA DC current signals to operate field devices, including control valves, variable frequency drives, dampers, and actuators.
HART Protocol and Output Architecture
The module features eight individually isolated channels supporting bi-directional HART communication. This architecture enables simultaneous transmission of process control signals and field device diagnostic data, allowing operators to monitor instrument health, perform remote calibrations, and view secondary device parameters without interrupting output loops.
Electrical Specifications and Power Requirements
The card receives local bus power at 12 VDC (150 mA) from the DeltaV carrier, while bussed field power requires 24 VDC (300 mA). Each field circuit delivers up to 23 mA at 24 VDC to drive field loops. The hardware supports hot-swapping under power and supports redundant I/O carrier configurations to preserve system uptime during module maintenance.
Mechanical and Environmental Features
Designed for mounting on DeltaV Series 2 I/O carriers, the module features mechanical keying assigned to position A4 to prevent accidental insertion into incorrect carrier slots. It is rated for operating temperatures from -40 deg C to +70 deg C, non-condensing relative humidity of 5-95%, ISA-S71.04-1985 Class G3 airborne contaminants, and holds ATEX Zone 2 certification for hazardous locations.
| Parameter | Specification |
|---|---|
| Model Number | KJ3221X1-BA2 |
| Brand | Emerson |
| Spare Part Number | 13P0125X012 |
| Product Type | Analog Output Module |
| Series | DeltaV Series 2 |
| Output Channels | 8 isolated channels |
| Output Signal | 4–20 mA DC |
| Communication Protocol | HART |
| Local Bus Power | 12 VDC at 150 mA |
| Bussed Field Power | 24 VDC at 300 mA |
| Field Circuit Power | 24 VDC at 23 mA per channel |
| Terminal Block Key Position | A4 |
| Operating Temperature | -40 deg C to +70 deg C |
| Relative Humidity | 5–95%, non-condensing |
| Vibration Resistance | 1 mm peak-to-peak (2–13.2 Hz); 0.7 g (13.2–150 Hz) |
| Shock Resistance | 10 g, half-sine wave, 11 ms |
| Contaminant Rating | ISA-S71.04-1985 Class G3 |
| Hazardous Area Certification | ATEX Zone 2 |
| Dimensions | 130 mm × 40 mm × 160 mm |
| Weight | 0.55 kg |
Frequently Asked Questions
Q: Does the KJ3221X1-BA2 module support hot-swapping in live systems? A: Yes, it is designed for online removal and replacement without interrupting power or operations on adjacent cards on the DeltaV carrier.
Q: What keying position is required for the terminal block? A: The module requires a terminal block mechanical keying set to position A4 to prevent mis-slotting.
Q: What power inputs does the KJ3221X1-BA2 require for operation? A: It draws 12 VDC (150 mA) from the local bus and 24 VDC (300 mA) for bussed field power, delivering 24 VDC at 23 mA per channel loop.
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