Foxboro 762CSA‑3A Dual‑Loop Micro‑Processor Controller

Technical Specifications

Model:762CSA‑3A

Brand:Foxboro

Series:762C Single‑Station Micro‑Controller

Function:Dual independent process loop PID closed‑loop regulation

Control algorithm:Proportional‑Integral‑Derivative PID,with patented EXACT auto‑tuning function

Analog input:4‑channel 4‑20mA process signal input

Analog output:2‑channel 4‑20mA control output,split‑range output support

Discrete I/O:2 contact input,2 contact output

Operator interface:Front‑panel fluorescent bargraph plus digital readout,keypad for parameter configuration

Operation feature:Bumpless auto‑manual transfer,loop tag display,alarm indication

Proportional band:5‑500% adjustable

Integral time:0.01‑50 minutes adjustable

Derivative time:0.01‑50 minutes adjustable

Installation:Standard instrument rack‑mount,backplane bus connection

Diagnostic:On‑board LED indicators for module power,communication and loop alarm

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

Housing:Aluminum ribbed rack‑mount housing,vibration‑resistant 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:0.55kg

Dimensions:36mm × 127mm × 143mm

Certification:CE,UL

MTBF:>86000 hours

Built‑in function

762CSA‑3A dual‑loop micro‑processor controller can run two independent PID control loops simultaneously for pressure,flow,temperature and liquid‑level regulation. Built‑in EXACT auto‑tuning simplifies field loop commissioning without manual repeated parameter adjustment. Front‑panel bargraph‑digital display visualizes PV,SP and output value,keypad completes local parameter modification. Bumpless auto‑manual switching prevents output shock during mode change. Split‑range output function supports dual‑actuator coordinated control for special process conditions. Metal ribbed housing improves heat dissipation and anti‑interference performance for continuous‑running chemical and petro‑chemical plants.

Product Brief

762CSA‑3A belongs to Foxboro 762C legacy control spare‑part family,obsolete original automation component. It requires matching instrument rack and correct field analog signal wiring. Widely used for original Foxboro process‑control equipment maintenance and renovation. ESD anti‑static protection shall be followed during installation