F3AD08-4W Yokogawa FA-M3 Datasheet & Technical Manual

Yokogawa F3AD08-4W FA-M3 Analog Input Modules

Yokogawa F3AD08-4W FA-M3 Analog Input Modules

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Yokogawa F3AD08-4W FA-M3 Analog Input Module Configured for high-speed current signal acquisition in FA-M3 PLC platforms, the Yokogawa F3AD08-4W (F3AD08-4W...

SKU: F3AD08-4W

Manufacturer: Yokogawa
Product No.: F3AD08-4W
Product Type: Analog Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 200g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa F3AD08-4W FA-M3 Analog Input Module

Configured for high-speed current signal acquisition in FA-M3 PLC platforms, the Yokogawa F3AD08-4W (F3AD08-4W Analog Input Module) provides direct physical/electrical execution. The module accepts 8 differential analog current loops (0–20 mA DC or 4–20 mA DC) across an 18-point terminal block, whereupon internal A/D converters execute 12-bit digitization at selectable speed rates. Integrated photocoupler isolation barriers block field-induced common-mode noise, while internal bus interfaces route digital process values across the central controller backplane without transmission delay.

Hardware Specifications

Parameter	Specification
Model	F3AD08-4W
Brand	Yokogawa
Origin	Japan
Product Family	FA-M3 / FA-M3V
Module Type	Analog Input Module
Number of Channels	8 differential inputs
Input Signal Range	0–20 mA DC, 4–20 mA DC (-1.0 to 21.0 mA DC)
Absolute Maximum Input	±25 mA DC or ±18 V DC
Input Resistance	250 Ω
A/D Conversion Resolution	12-bit (up to 1.6 µA)
Conversion Speed	Selectable: 50 µs to 100 ms per channel
Overall Accuracy	±0.1% FS at 23 deg C, ±0.2% FS at 0 to 55 deg C
Electrical Isolation	Photocoupler isolation (input terminals to internal circuits)
Withstanding Voltage	500 V DC for 1 minute
Common-mode Voltage	±6 V DC max
Power Consumption	210 mA at 5 V DC
Operating Temperature	0 to 55 deg C
Physical Dimensions	28.9 x 100 x 106.2 mm
Unit Weight	0.20 kg
External Terminal	18-point detachable terminal block (M3.5 screws)

4-20 mA HART Loop Protocol & Channel-to-Channel Isolation

The module processes standard 4-20 mA DC analog transmitter loops while internal photocoupler barriers provide robust isolation between field terminals and internal CPU logic. Onboard hardware execution units manage per-channel digital filtering (first-order lag or moving average) and zero/span offsets, whereupon scaled digital values pass to the system backplane without CPU overhead. Galvanic separation suppresses ground loop currents across field loops, while internal self-diagnostic routines actively audit over-range current levels and hardware circuit health during operational execution.

Frequently Asked Questions

Q: Can the F3AD08-4W module process 0-10 V voltage input signals directly on its channels?

A: No. The internal circuitry utilizes an integrated 250 Ω shunt resistor scaled specifically for current loops (0–20 mA and 4–20 mA). Connecting raw voltage sources directly can exceed maximum current ratings and damage internal shunt components.

Q: Does the module support live removal or terminal block replacement while the FA-M3 rack remains powered?

A: Technicians can safely disconnect the 18-point external terminal block for loop maintenance, but extracting the module itself from the base rack requires de-energizing the main 5 V DC backplane supply to prevent system bus lockup.

Q: How does the module handle signal values outside the normal 4-20 mA range?

A: The onboard converter measures Extended ranges (-1.0 to 21.0 mA DC), whereupon internal firmware triggers an over-range flag and holds process registers according to pre-configured fail-safe parameters.

Field Installation Guidelines

ESD Mitigation & Handling: Technicians must attach a grounded anti-static wrist strap to the enclosure rack before removing the card from its protective bag. Handle the module strictly by its outer plastic shell to protect edge connector contacts against ESD damage.
Mechanical Mounting: Insert the module upper and lower alignment tabs into the designated FA-M3 base slot. Push the unit firmly inward until the lock lever engages with an audible click to confirm mechanical seat alignment.
Field Wiring & Shield Grounding: Connect 4-20 mA current loops using twisted-pair shielded cable to the M3.5 terminal screws. Torque terminal screws evenly to 0.8 Nm, and terminate wire shields to a single cabinet ground bar to prevent noise pickup.
Thermal Clearance & Orientation: Mount the base rack vertically to facilitate natural heat dissipation across the ventilation slots. Maintain at least 50 mm of unobstructed space above and below the rack chassis to keep operating temperatures strictly within the 0 to 55 deg C window.

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