YOKOGAWA AAI543-S00

Technical Specifications Output Channels: 16 channels, individually isolated Output Signal Range: 4 to 20 mA DC Output Accuracy: ±0.1% of full scale typical Allowable Load Resistance: 0 to 750 Ω Data Update Period: 10 ms Withstand Voltage: 1500 V AC between output and system, 1 minute Circuit-Open Detection: less than 0.65 mA Temperature Drift: ±16 µA per 10 °C Current Consumption: 230 mA at 5 V DC Operating Temperature: 0 to +55 °C Storage Temperature: -40 to +70 °C System Compatibility: CENTUM VP, CENTUM CS 3000 Mounting: FIO I/O rack (ANB10, ANR10, AFF50, AFV10, AFV30, AFV40)

Functional Features Sixteen galvanically isolated output channels deliver clean, independent current signals free from ground-loop interference. The 10 ms update period supports fast process loops. Open-circuit detection reports loop faults to the control system. Hot-swap capability allows module replacement without powering down the rack. Standard screw-clamp terminals (S1 style) provide secure, widely compatible field wiring.

Application Scenarios General-purpose analog output in refineries, chemical plants, water treatment facilities, food and beverage processing, pharmaceutical manufacturing, and boiler control systems. Drives control valves, I/P converters, variable-speed drives, damper actuators, and other 4 to 20 mA loop-powered or self-powered field devices.

Performance Parameters Output resolution: 16-bit equivalent Linearity: within ±0.05% of full scale Load regulation: within ±0.1% across 0 to 750 Ω Isolation resistance: greater than 100 MΩ at 500 V DC Ambient humidity: 5 to 95% RH non-condensing Vibration resistance: complies with IEC 60068-2-6 industrial standards

Material Composition UL 94 V-0 flame-retardant front panel and side moldings. Gold-plated backplane connector pins. Glass-epoxy PCB with conformal coating option. Internal toroidal isolation transformers. Steel EMC shielding plate.

Structural Features Single-width plug-in card occupying one rack slot. Front panel features a module-status LED, a channel-activity LED array, and a captive retaining screw. Standard screw-clamp terminal block (M3 or M3.5) accepts 0.5 to 2.5 mm² wire. Rear connector interfaces with the rack backplane for ESB bus communication, 5 V DC power, and I/O signal routing.

Working Principle The FCS transmits 16-bit digital setpoint values to the module over the ESB bus. Each channel’s digital value is converted by a high-resolution DAC to an analog voltage, which a precision voltage-to-current converter translates into a 4 to 20 mA output. Per-channel DC-DC converters and optocouplers provide full galvanic isolation between channels and between the field side and system side. Open-loop monitoring circuitry detects current below the 0.65 mA threshold and raises a fault flag.

Installation Requirements Insert the module into a free slot of a compatible FIO node rack and tighten the retaining screw. Connect field wiring to the screw-clamp terminals per the channel wiring diagram, observing correct polarity. Confirm total loop load including wire resistance does not exceed 750 Ω. Apply 24 V DC field-side power where required. Verify ambient temperature is within 0 to +55 °C and the rack receives specified forced-air cooling.

Usage Precautions Do not exceed 750 Ω total load on any channel. Use shielded twisted-pair cable for all output loops and ground the shield at a single point. Keep analog wiring separated from high-voltage and high-frequency cables. Before hot-swapping, place the control loop in manual or bypass to avoid process upset. Do not connect external voltage sources to output terminals. Verify all 16 channels are configured in the engineering software before energizing field devices.