F3AD04-0N Yokogawa A/D Converter Module

Hardware Specifications

Analog Signal Conversion and Process Data Handling

The F3AD04-0N converts incoming voltage signals into 12-bit digital data. Its four input channels share the conversion circuitry through multiplexed scanning.

The module supports three software-selectable voltage ranges:

• 0 V to 5 V DC
• 1 V to 5 V DC
• -10 V to 10 V DC

Each channel supports individual range configuration and filtering. Consequently, the module can process different voltage measurement requirements within the same installation.

The conversion rate is 1 ms per input point. Therefore, a complete four-channel scan requires approximately 4 ms.

The photocoupler provides electrical isolation between the input terminals and internal circuitry. However, the input channels share a common negative reference and do not provide channel-to-channel isolation.

The scaling function allows the user to configure upper and lower limits between -20,000 and 20,000 for engineering data conversion.

Frequently Asked Questions (FAQ)

Q: Does the F3AD04-0N support independent input voltage ranges?

A: Yes. Each input channel supports software-selectable voltage ranges of 0 V to 5 V DC, 1 V to 5 V DC, or -10 V to 10 V DC.

Q: Are the four input channels electrically isolated from each other?

A: No. The module provides photocoupler isolation between input terminals and internal circuits. However, the four channels share a common negative reference.

Q: What do the RDY and ALM indicators represent?

A: The RDY LED indicates the module’s ready status. The ALM LED illuminates when the module detects an anomaly in its calibration data.

Field Installation Guidelines

1. Install the F3AD04-0N in a compatible FA-M3 PLC configuration according to the system hardware documentation.
2. Secure the module and verify that its terminal block is correctly seated.
3. Connect analog voltage signals to the designated input terminals. Confirm the polarity and common-negative wiring before energizing the system.
4. Configure the voltage range for each channel through the applicable PLC configuration software.
5. Route analog signal wiring separately from high-voltage power cables and sources of electromagnetic interference.
6. Apply cable shielding and grounding according to the system grounding design and instrument wiring requirements.
7. Verify the RDY and ALM indicators during commissioning.
8. Confirm the scaling limits and filtering settings before using converted values in PLC control logic.
9. Check the available 5 V DC internal supply capacity when calculating the total backplane load.