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Yokogawa F3DA08-5R FA-M3 Analog Output Module

Configured for precise analog output conversion in Yokogawa FA-M3 PLC platforms, the Yokogawa F3DA08-5R (F3DA08-5R Analog Output Module) provides direct physical/electrical execution. The module converts internal digital controller signals into proportional voltage and current control loops to actuate field positioning hardware across industrial process systems.

Hardware Specifications

Parameter Specification
Model F3DA08-5R
Brand Yokogawa
Origin Japan
Weight 0.2 kg
Dimensions 28.9 x 100 x 83.2 mm
Operating Temp 0 to 55 deg C
Power Consumption 60 mA at 5 VDC (backplane bus); 19.2 to 30 VDC external supply
Number of Outputs 8 channels
Output Ranges (Voltage) -10 to 10 V, 0 to 10 V, 0 to 5 V, 1 to 5 VDC
Output Ranges (Current) 4 to 20 mA, 0 to 20 mA, -20 to 20 mA DC
Output Resolution 12-bit D/A conversion
Output Conversion Speed 2 us + 2 us x (number of updated channels)
Output Impedance 0.5 ohm max (Voltage); 3 M ohm max (Current)
Isolation 500 VDC for 1 min (internal circuitry to output channels)
External Connection 18-point terminal block with M3.5 screws
D/A Scaling Range Settable within -30000 to 30000 digital counts

DCS Process Loop and Analog Control Features

The module provides full integration with 4-20 mA HART loop protocol environments and high-density DCS actuation loops. It features configurable channel-to-channel operational parameters and specialized software scaling between -30000 and 30000 counts for direct calibration against field equipment. Each channel accommodates selectable voltage or current signals while maintaining high output impedance values up to 3 M ohm in current mode to ensure precise current loop regulation. Individual channel fallback behaviors can be set independently to hold or clear values during CPU failure events.

Frequently Asked Questions

Q: What happens to the channel outputs if the host CPU enters a fault state?

A: The CPU fail-time output response can be configured independently for each channel to either hold the last valid analog value or reset to a predetermined safe output state.

Q: Are individual output channels isolated from one another?

A: The module provides digital isolation coupler protection rated at 500 VDC for 1 minute between internal backplane logic and output terminals. However, individual output channels share a common negative potential and are not isolated from each other.

Q: What are the load impedance constraints for voltage and current modes?

A: For voltage mode, the minimum allowable load resistance is 1 k ohm for -10 to 10 V or 0 to 10 V ranges, and 500 ohm for 0 to 5 V or 1 to 5 V ranges. For current mode, allowable load resistance spans up to 600 ohm max.

Field Installation Guidelines

Mount the module securely into the designated slot of the FA-M3 chassis backplane prior to applying logic power. Route all field wires cleanly to the front-mounted 18-point terminal block and tighten the M3.5 terminal screws to recommended torque limits to avoid high-resistance junction points. Maintain dedicated separation between field wiring conduits and high-voltage power cables inside cabinet wireways. Connect all signal cable shielding to a designated panel earth ground at a single point to mitigate loop noise and external noise coupling on sensitive analog channels.

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