Description
Product Description
Overview
The Emerson KJ3222X1-EA1 is an 8-channel Analog Output (AO) module from the S-Series, designed for use in the DeltaV™ Distributed Control System. It converts digital control signals into precise 4–20 mA outputs while enabling HART communication for advanced monitoring and device management. This module ensures reliable integration with smart field devices, such as actuators, positioners, and control valves, while supporting both standard analog loops and digital diagnostics.
Key Features
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HART Pass-Through Communication: Supports bi-directional HART, enabling secondary variable readings, device diagnostics, and remote configuration.
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AMS Integration: Fully compatible with Emerson Asset Management Solutions for predictive maintenance and remote device calibration.
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High-Precision Output: Maintains accurate 4–20 mA signals for consistent process control and stable valve positioning.
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Diagnostic Safety Functions: Detects open circuits and monitors output current for reliable loop verification.
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Rugged Construction: G3 conformal coating protects against corrosive environments, and operation is guaranteed from -40°C to 70°C.
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Hot-Swappable Design: Can be replaced without shutting down the entire I/O carrier system, improving uptime.
Technical Specifications
| Feature |
Specification |
| Model Number |
KJ3222X1-EA1 |
| I/O Type |
Analog Output (AO) |
| Number of Channels |
8 |
| Output Signal |
4–20 mA DC |
| Communication Protocol |
HART (Versions 5–7) |
| Input Power |
30 VDC, 200 mA |
| LocalBus Power |
Max 300 mA at 12 VDC |
| Field Power Requirement |
External 24 VDC loop power |
| Operating Temperature |
-40 to 70 °C (-40 to 158 °F) |
| Shock |
10 g, half-sine, 11 ms |
| Vibration |
1 mm P–P from 2–13.2 Hz, 0.7 g from 13.2–150 Hz |
| Airborne Contaminants |
ISA-S71.04 Class G3 |
| Relative Humidity |
5–95% non-condensing |
| Mounting |
S-Series I/O Carrier |
| Maintenance |
No user-serviceable parts; calibration not required |
Applications
The KJ3222X1-EA1 is ideal for controlling smart field devices in critical processes:
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Smart control valves requiring precise positioning and diagnostic monitoring
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Loops needing integration of 4–20 mA analog control with HART-enabled feedback
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High-availability systems where hot-swappable I/O reduces downtime
Installation Notes
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This unit must be powered down before removal or insertion.
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For Zone 2 hazardous areas, refer to DeltaV™ CHARM I/O installation guidelines.
FAQ
Q: Can this AO module communicate with HART field devices?
A: Yes, it provides bi-directional HART pass-through for device monitoring and diagnostics.
Q: Does the module require calibration?
A: No calibration is required; the unit is factory-set and maintenance-free.
Q: Is the module hot-swappable?
A: Yes, it can be replaced under power without affecting other I/O modules on the carrier.
