Foxboro DM400YJ FBM08 Discrete Input Fieldbus Module

Technical Specifications

Model:DM400YJ

Brand:Foxboro

System compatibility:I/A Series DCS system,FBM fieldbus I/O subsystem

Function:Fieldbus discrete input module,collects 120VAC on‑site switch,auxiliary contact and interlock feedback status signals

Installation:Baseplate‑mount installation,mated with dedicated FBM baseplate assembly

Channel quantity:8 discrete AC input channels

Input voltage:120VAC,47‑63Hz

Isolation:Opto‑electrical galvanic isolation between field‑side and system‑side,reinforced isolation strength

Input filter:Software configurable signal debounce filter for contact‑bounce suppression

Feature:Support hot‑swap online replacement without subsystem power‑off

Diagnostic:Per‑channel green LED for channel status;multi‑color front‑panel LED for module power and fieldbus communication fault

Power supply:Powered via FBM baseplate backplane

Protection:Independent transient surge protection for each input channel

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

Housing:Aluminum alloy metal housing,slot‑in baseplate mechanical locking 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:0.95kg

Dimensions:36mm × 128mm × 144mm

Certification:CE,UL

MTBF:>87000 hours

Built‑in function

DM400YJ FBM08 discrete input module collects 120VAC wet‑contact status signals from field switches,valve auxiliary contacts and interlock feedback devices. Opto‑electrical isolation eliminates ground‑loop interference and industrial noise. Configurable input filter removes contact bounce disturbance. It transmits digital status data to I/A‑Series control processor through FBM fieldbus. Hot‑swap function supports online module replacement and reduces plant downtime risk. Per‑channel LED facilitates quick on‑site signal inspection,widely applied for AC‑type interlock and equipment‑feedback signal acquisition loops in petrochemical,chemical and power‑plant DCS facilities.

Product Brief

DM400YJ belongs to Foxboro I/A Series legacy DCS FBM I/O spare‑part family,obsolete original fieldbus input module component. Must be matched with corresponding FBM baseplate assembly. Widely used for original Foxboro DCS equipment maintenance and renovation. ESD anti‑static protection shall be followed during installation.