The Yokogawa F3XD08-6F, also cataloged as the F3XD08 DC Digital Input Module, operates as a dedicated hardware component for discrete state signal processing within Yokogawa FA-M3 PLC platforms.
| Parameter | Specification |
|---|---|
| Model | F3XD08-6F |
| Brand | Yokogawa Electric Corporation |
| Origin | Japan |
| Weight | 130 g |
| Dimensions | Standard FA-M3 single-slot module dimensions |
| Operating Temp | 0 deg C to +55 deg C |
| Power Consumption | 40 mA at 5 VDC (backplane internal current draw) |
| Input Channels | 8 points (1 common) |
| Input Type | DC sink/source compatible |
| Rated Input Voltage | 12 to 24 VDC |
| Operating Voltage Range | 10.2 to 26.4 VDC |
| ON Voltage / Current | >= 8.0 VDC / >= 2.6 mA |
| OFF Voltage / Current | <= 3.4 VDC / <= 1.0 mA |
| Rated Input Current | 4.1 mA per point (12 VDC), 8.5 mA per point (24 VDC) |
| Response Time | Selectable (0 us, 62.5 us, 250 us, 1 ms, 16 ms) |
| Isolation Method | Photocoupler isolation |
| External Connection | 10-point terminal block with M3.5 screws |
The F3XD08-6F incorporates optical photocoupler barriers that separate field-side DC wiring from internal logic circuits, suppressing high-frequency noise and ground potential differentials across industrial control loops. The module supports selectable input filtering down to 0 us response times, enabling high-speed interrupt generation per point when tracking rapid state transitions on proximity switches, limit sensors, and discrete field contacts.
Q: How does switching between sink and source modes affect internal circuit connection on the terminal block?
A: Transitioning between sink and source wiring configurations requires altering external DC power supply connections to the shared common terminal on the 10-point block. Photocoupler diodes internally accommodate bidirectional current flow across all 8 input channels without needing internal jumper adjustments.
Q: Can response time filtering settings be modified per channel during active controller runtime?
A: Configured input filter response times (ranging from 0 us to 16 ms) write directly into controller system registers during sequence startup. Changing filter settings during runtime requires transmitting updated setup parameters via the backplane bus, which may momentarily delay signal updates for the target input point.
Technicians must strip field wiring to appropriate lengths before securing conductors into the 10-point M3.5 screw terminal block, applying a tightening torque between 0.8 N m and 1.2 N m to maintain firm electrical contact. Ensure field power supply lines stay routed separately from high-voltage AC motor cables to reduce inductive noise coupling into the 12-24 VDC signal lines. Field engineers must verify system power removal before inserting or extracting the module from the FA-M3 rack frame to prevent transient electrical stresses on the backplane connection. Connect field wiring shields directly to the cabinet protective earth bar using low-impedance grounding straps.
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