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YOKOGAWA ATA4D-00 S2 Analog Output Module

Configured for precise control signal execution in CENTUM DCS platforms, the YOKOGAWA ATA4D-00 S2 (ATA4D-00 Analog Output Module) provides direct physical/electrical execution.

Hardware Specifications

Parameter Specification
Model ATA4D-00 S2
Brand Yokogawa
Origin USA
Weight 0.3 kg
Dimensions 15.2 x 7.6 x 25.4 cm
Operating Temp -20 deg C to +70 deg C
Power Consumption 310 mA (5 VDC), ~500 mA (24 VDC)
Channel Count 4 Analog Outputs
Output Signal 4-20 mA DC
Load Resistance 0-750 Ohm

Process Control and Signal Integrity

The ATA4D-00 S2 facilitates high-fidelity control by generating stable 4-20 mA HART loop protocol signals for field actuators. The module utilizes a high-speed DAC architecture to achieve a 10 ms data update period and a sub-40 ms step response, ensuring minimal lag in closed-loop control applications. Given that the module circuitry is non-isolated, maintaining a common-mode voltage reference within specified limits is mandatory to prevent signal instability. The integrated diagnostic suite includes real-time open-circuit detection, which triggers a fault state if current flow drops below the 0.65 mA threshold.

Frequently Asked Questions

Q: Can this module be configured for dual-redundant operation?

A: Yes. The ATA4D-00 S2 supports dual-redundant pairing when installed in the designated redundant rack configuration. The system controller manages the bumpless switchover between the primary and secondary modules upon detection of a diagnostic fault.

Q: What are the consequences of exceeding the 750 Ohm load resistance limit?

A: Exceeding the maximum load resistance causes the module's output stage to saturate, resulting in signal clipping and a loss of control accuracy. Verify that the total loop impedance, including wire resistance and field device impedance, remains below this threshold.

Field Installation Guidelines

  1. Grounding: As the module is non-isolated, ensure the chassis ground is connected to a clean, low-impedance earth bus to minimize noise injection into the analog loops.
  2. Wiring: Use high-quality shielded twisted-pair cabling for all 4-20 mA outputs. Terminate the shields at the cabinet-side ground stud to reduce susceptibility to electromagnetic interference.
  3. Connector Interface: The module supports pressure clamp, KS cable, or MIL connector interfaces. Ensure the selected connector is fully seated and the locking mechanism is engaged to prevent vibration-induced intermittent connections.

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