Foxboro DM400YT FBM17 Mixed Contact / DC I/O Fieldbus Module

Technical Specifications

Model:DM400YT

Brand:Foxboro

System compatibility:I/A Series DCS system,FBM fieldbus I/O subsystem mixed‑signal module

Function:FBM17 mixed I/O fieldbus module,collects 24VDC field status signals and provides dry‑contact relay output for local actuators

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

Input channel:24VDC discrete input with galvanic channel‑wise isolation

Output channel:Form A dry‑contact relay output for driving solenoid valves and contactors

Circuit feature:Each channel adopts independent isolation design;RC surge‑suppression for relay output loops

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

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

Power supply:Powered via FBM baseplate backplane

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:0.98kg

Dimensions:36mm × 128mm × 144mm

Certification:CE,UL

MTBF:>84000 hours

Built‑in function

DM400YT FBM17 mixed‑I/O fieldbus module is multi‑signal acquisition and drive unit for Foxboro I/A‑Series DCS system. It acquires 24VDC discrete status signals from field switches and sensors through isolated input channels. Relay dry‑contact outputs drive on‑site solenoid valves and contactors. Independent channel‑isolation structure reduces cross‑channel interference. RC surge‑suppression circuit absorbs inductive‑load back‑EMF and extends relay service life. Hot‑swap function supports online module replacement and reduces plant downtime risk. Per‑channel LED facilitates quick on‑site signal inspection,widely applied for mixed discrete‑signal control loops in petrochemical,chemical and power‑plant DCS cabinets.

Product Brief

DM400YT belongs to Foxboro I/A Series legacy DCS FBM I/O spare‑part family,obsolete original fieldbus mixed‑contact‑DC‑I/O 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.