AAI543-S50/A4S10 Analog I/O Module YOKOGAWA

Product Description

Configured for analog signal acquisition and drive in CENTUM CS3000, the YOKOGAWA AAI543-S50/A4S10 (AAI543 Analog I/O Module) provides direct physical/electrical execution of 4-20 mA and voltage loop termination on the DCS node bus.

Hardware Specifications

HART Loop and Channel Isolation Behavior

The module executes 4-20 mA HART loop protocol on both input and output channels without external modem coupling. Each channel applies channel-to-channel isolation rated for 500 VDC proof voltage against the backplane and adjacent loops. HART superimposition occupies the 1200 Hz / 2200 Hz FSK band and passes through the module's front-end conditioning without demodulation. When a HART master polls the loop, the module holds the DC drive value and forwards the digital carrier transparently. Cold junction compensation is not implemented because no thermocouple input is present; however, the voltage input stage uses a precision 2.5 V reference for 1-5 V scaling with 16-bit ADC resolution per input.

Frequently Asked Questions

Q: Does the AAI543-S50/A4S10 support hot-swap replacement under live 24 VDC backplane power?

A: Yes. The module inserts into the CENTUM CS3000 I/O nest with live backplane power. Before extraction, the engineer must force the associated output channels to manual or hold state in the FCS to avoid valve step movement. Input channels resume scanning within one FCS execution cycle after seat confirmation.

Q: What is the backplane current draw at 24 VDC excluding field loop power?

A: The module draws 8 W max from the 24 VDC backplane, equivalent to 333 mA at nominal supply. Field-side loop power for 4-20 mA transmitters is sourced externally; the module only sinks or sources the signal current, not the transmitter excitation.

Q: Can the S50 and A4S10 suffix options mix within one I/O nest?

A: Yes. Suffix codes define internal firmware and connector options but share the same mechanical footprint and backplane pinout. The FCS recognizes each card by its EEPROM descriptor. Mixing suffixes in one nest requires no hardware jumper change.

Field Installation Guidelines

Mount the module in the designated CENTUM CS3000 I/O rack slot with the locking lever fully seated. Route 4-20 mA twisted-pair field cables separate from 24 VDC power trays by at least 150 mm or through divided cable duct. Terminate shield drain at the DCS side only using the shield clamp on the terminal block; never ground the field end. For HART loops, keep cable capacitance below 4000 pF and loop resistance between 250 ohm and 1100 ohm including transmitter load. Verify 24 VDC supply ripple stays under 100 mV peak-to-peak before backplane energization. After insertion, confirm green RUN LED and absence of red ERR blink prior to returning output channels to cascade or auto mode.

Other Attributes

• Country of Origin: Japan/Singapore
• Lead Time: In Stock, 2 Working Days

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TEL: +86 18030205725     E-MAIL: manskiwong@cambia.cn

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We offer a standard one-year warranty for all new and original items.

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