The Yokogawa F3AD04-0N, also cataloged as the F3AD04 Analog Input Module, operates as a dedicated hardware component for analog voltage signal conversion within FA-M3 PLC series platforms. The module executes multi-channel analog-to-digital (A/D) signal translation to transform external voltage source inputs into proportional digital registers utilized by the central processor rack. It employs hardware-level photocoupler components to decouple the low-voltage internal system logic lines from external field-side cabling loops.
| Parameter | Specification |
|---|---|
| Model | F3AD04-0N |
| Brand | Yokogawa |
| Platform | FA-M3 PLC Series |
| Origin | Japan |
| Weight | 170 g (0.30 lbs) |
| Dimensions | 28.9 x 100 x 83.2 mm |
| Operating Temp | 0 to 55 deg C |
| Power Consumption | 210 mA at 5 V DC (internal logic draw) |
| Input Configuration | 4 voltage channels (shared common negative loop topology) |
| Input Voltage Ranges | 0 to 5 V DC, 1 to 5 V DC, -10 to +10 V DC |
| Absolute Maximum Input Rating | Plus or minus 18 V DC |
| Isolation Mechanism | Photocoupler isolation (input terminals to internal circuitry) |
| Dielectric Withstand Voltage | 500 V DC for 1 minute |
| Input Input Resistance | 1 MΩ |
| A/D Conversion Resolution | 12-bit (1.4 mV step at 0-5 V / 1-5 V DC; 5.7 mV step at -10 to +10 V DC) |
| Base Conversion Speed | 1 ms multiplied by the number of active input channels |
| Digital Output Scaling | Adjustable software mapping from -20000 to +20000 |
| Termination Interface | 10-point terminal block with M3.5 screw connections |
The module shares process variable states across the system backplane by adhering to strict backplane bus communication velocity limits assigned by the base rack slot controller. The multi-channel multiplexing sequence allows variable configuration changes to expand system scaling parameters without introducing signal jitter across high-density adjacent cards. This internal bus coupling configuration maintains firmware flash compatibility parameters across legacy FA-M3 bases, assuring deterministic register access and software digital filtering operations during continuous multi-channel operational cycles.
Q: How does selecting a software digital filter modify the hardware conversion speed?
A: The underlying hardware conversion rate remains fixed at 1 ms per enabled channel, but configuring internal digital software smoothing algorithms adds sequential execution cycles before updating the final register values on the backplane bus.
Q: Can an external current transmitter loop interface directly into these voltage terminals?
A: No, the input architecture reads voltage potentials exclusively; a high-precision external precision resistor matrix must be wired across the positive and negative terminals to convert a 4-20 mA current signal into a standard 1-5 V DC potential.
Q: What happens if an input voltage spikes to plus or minus 15 V DC on a 0-5 V DC configured channel?
A: The channel digital value will saturate at its maximum software limit, but the hardware will not sustain damage because the internal buffer circuits are rated to withstand up to an absolute maximum of plus or minus 18 V DC continuously.
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