YOKOGAWA AAI543-H61/K4A00 is a
16-channel isolated analog output module designed for industrial process control systems. It belongs to Yokogawa’s
AAI543 series, which is optimized for high-reliability signal transmission in distributed control systems (DCS) such as
CENTUM VP.The
-H61 suffix denotes
HART protocol support and
fast-switching redundant configuration without explosion-proof certification, while
/K4A00 specifies a
KS cable interface adapter for connection to AEA4D terminal blocks
The AAI543-H61/K4A00 serves as a critical component for converting digital control signals into analog outputs (4–20 mA) to drive actuators, valves, and other process equipment. Key functionalities include:
Precision Signal Output
- 4–20 mA Isolated Output: Supports standard industrial current loops with galvanic isolation to prevent ground loops and electromagnetic interference (EMI)
- HART Communication: Enables bidirectional communication with HART-compatible field devices for remote configuration, diagnostics, and calibration.
Redundant Configuration
- Fast-Switching Redundancy: The -H61 variant ensures seamless failover between redundant modules with minimal downtime, critical for continuous process operations.
- High Availability: Designed for systems requiring 99.999% uptime, such as chemical reactors or oil refineries514.
Flexible Integration
- Modular Design: Supports plug-and-play installation in Yokogawa’s CENTUM VP DCS racks, with compatibility for mixed I/O configurations.
- Terminal Block Options: Configurable with pressure-clamp terminals (ATA4S-10) or dual-pressure terminals (ATA4D-10) for surge protection.
Environmental Robustness
- Wide Temperature Range: Operates reliably from -20°C to 70°C, suitable for harsh industrial environments.
- ISA G3 Compliance: Resistant to corrosive gases and dust, ensuring long-term stability in petrochemical or offshore applications.
| Parameter | Typical Value |
|---|
| Output Signal | 4–20 mA DC (isolated, 16 channels) |
| Communication | HART protocol (bidirectional) |
| Redundancy | Fast-switching redundant configuration |
| Input Voltage | 24V DC ±10% |
| Isolation | 500V AC (channel-to-channel, channel-to-ground) |
| Response Time | <10 ms (full-scale step) |
| Precision | ±0.05% of span (at 25°C) |
| Terminal Type | KS cable adapter (ATK4A-00) for AEA4D terminal blocks |
| Dimensions | 160 mm × 110 mm × 60 mm |
| Weight | ~0.8 kg |
| Operating Temperature | -20°C to 70°C |
The AAI543-H61/K4A00 is widely deployed in industries requiring precise analog control and high availability:
Process Automation
- Chemical Plants: Controls reactor pressure valves and distillation column temperature setpoints.
- Oil & Gas: Manages flow rates in pipelines and wellhead choke valves.
Energy Management
- Power Generation: Regulates steam turbine speed and boiler feedwater pumps.
- Renewables: Controls solar panel tilt mechanisms and wind turbine pitch systems.
Manufacturing
- Pharmaceuticals: Ensures sterile filling machine accuracy in batch processing.
- Food & Beverage: Optimizes pasteurization temperature profiles for bottling lines.
Building Automation
- HVAC Systems: Modulates chilled water valves for energy-efficient climate control.
- Fire Safety: Actuates smoke extraction dampers in emergency scenarios.
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