Foxboro CP40B Field Control Processor Module

Technical Specifications

Model:CP40B

Brand:Foxboro

System compatibility:I/A Series DCS system,enhanced hardware revision derived from CP40 / CP40A processor

Function:High‑performance field control processor core unit,executes real‑time PID regulation,sequential program and safety interlock logic for critical process loops

Installation:Standard I/A‑Series rack‑mount installation,mated with dedicated node baseplate

Communication interface:Nodebus high‑speed control network interface;FBM fieldbus interface for connecting remote FBM I/O subsystems

Redundancy feature:Support dual‑module fault‑tolerant redundant configuration,seamless bumpless switchover upon single module failure

Memory:On‑board non‑volatile memory,retains control configuration and application parameters after power loss

Feature:Support hot‑swap online replacement without system power‑off,front‑panel recessed manual reset button

Diagnostic:Front‑panel multi‑color LED indicators for module power,Nodebus link,fieldbus link and internal fault alarm;power‑on self‑test and runtime watchdog monitoring

Power supply:Rack backplane powered

Protection:Built‑in transient surge protection for all communication interfaces

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

Housing:Metal shielded rack‑mount housing,anti‑vibration mechanical reinforcement

Protection class:IP20

Horizontal operating temperature:0℃ ~ +60℃

Vertical operating temperature:‑20℃ ~ +55℃

Storage temperature:‑40℃ ~ +85℃

Relative humidity:5%‑95% non‑condensing

Weight:1.23kg

Dimensions:34mm × 250mm × 220mm

Certification:CE,UL

MTBF:>85000 hours

Built‑in function

CP40B field control processor is enhanced hardware revision of Foxboro CP40A control processor for I/A‑Series DCS system. It communicates with operator workstation via Nodebus network and connects field FBM I/O subsystems through fieldbus. It undertakes real‑time PID adjustment,sequence logic execution and safety interlock processing for heavy‑load control tasks. Dual‑module redundant configuration realizes bumpless switchover to avoid production interruption caused by single hardware failure. Hot‑swap function supports online module replacement and reduces plant downtime risk. Front‑panel LED feedback facilitates on‑site fault inspection,widely applied for high‑reliability critical process‑control loops in petrochemical,chemical and power‑plant DCS cabinets.

Product Brief

CP40B belongs to Foxboro I/A Series legacy DCS control‑node spare‑part family,obsolete original rack‑mount processor component. Must be fitted in matching I/A‑Series instrument rack with correct Nodebus and fieldbus wiring. Widely used for original Foxboro DCS equipment maintenance and renovation. ESD anti‑static protection shall be followed during installation.