Foxboro 740RA‑A3333‑N Analog Output Module

Technical Specifications

Model:740RA‑A3333‑N

Brand:Foxboro

System compatibility:I/A Series DCS system

Function:Multi‑channel analog output,convert internal bus control data to 4‑20mA field loop signal for actuators

Installation:Standard rack‑mount,direct baseplate backplane fieldbus connection

Feature:Support hot‑swap replacement without rack power‑off

Output signal:4‑20mA analog current loop

Accuracy:±0.12% full scale

Resolution:12‑bit digital‑to‑analog conversion

Diagnostic:On‑board multi‑color LED for module power,bus communication and individual channel fault alarm

Protection:Built‑in over‑current and short‑circuit channel protection

Environmental standard:Compliant with ISA‑S71.04 Class G3 industrial atmospheric condition

Housing:Aluminum ribbed metal housing,anti‑vibration mechanical structure

Protection class:IP20

Horizontal operating temperature:0℃ ~ +60℃

Vertical operating temperature:‑20℃ ~ +55℃

Storage temperature:‑40℃ ~ +85℃

Relative humidity:5%‑95% non‑condensing

Weight:0.47kg

Dimensions:36mm × 128mm × 144mm

Certification:CE,UL

MTBF:>91000 hours

Built‑in function

740RA‑A3333‑N analog output module receives control set‑point data from I/A Series controller over backplane fieldbus,converts digital values to standard 4‑20mA analog signals to drive field control valves and actuators. Channel‑level short‑circuit protection prevents single‑loop failure from damaging the whole module. Hot‑swap function allows online replacement to reduce plant downtime risk. LED diagnostic indicators help technicians quickly locate communication and output‑channel faults for petrochemical,chemical and power‑plant continuous‑process loops.

Product Brief

740RA‑A3333‑N belongs to Foxboro I/A Series legacy DCS spare‑part family,obsolete original automation component. It needs to cooperate with matched I/A Series baseplate and control rack. Widely used for original Foxboro DCS equipment maintenance and renovation. ESD anti‑static protection shall be followed during installation