Foxboro PBCO-D8-009 — 8-Channel Digital I/O Communication Module

Product Identity: Foxboro PBCO-D8-009 — 8-Channel Digital I/O Communication Module

Series Classification: Foxboro PBCO Series DCS Interface Module

Core Function: Provides 8 discrete digital channels for signal interfacing between field devices and the Foxboro I/A Series Distributed Control System

Channel Architecture8 independent channels, each configurable as digital input OR digital output

Category:
Description

Input SpecificationDry contact (dry closure)24 VDC, sinking or sourcing logic

Output SpecificationTransistor (NPN/PNP) output24 VDC500 mA maximum per channel

System CompatibilityFoxboro I/A Series DCS controllers (Infi 90, I/A Series, and compatible platforms)

Communication BusFoxboro proprietary backplane bus — I/A Series internal communication protocol

Power Source24 VDC supplied via DCS backplane

Backplane Current Draw< 500 mA total module consumption

Channel-to-Channel Isolation500 VDC

Channel-to-Backplane Isolation500 VDC

Switching Speed≤ 10 ms input-to-output propagation delay

Operating Temperature0°C to +60°C (32°F to 140°F)

Storage Temperature−40°C to +85°C (−40°F to +185°F)

Humidity Tolerance5% to 95% RH non-condensing

Enclosure RatingNEMA 1 — indoor use only

Mounting OptionsDIN rail (35 mm) or panel mount with screw terminals

Terminal Specification: Screw terminal block, wire gauge 14 – 22 AWG

Status IndicationLED per channel — green indicates active state, red indicates fault condition

Physical Dimensions105 mm × 120 mm × 55 mm (W × H × D) approximate

Weight0.35 kg (0.77 lbs) approximate

Target Industries: Oil and gas SCADA integration, power plant DCS I/O expansion, chemical plant discrete control, water treatment automation

ComplianceCE MarkedFM Approved (with appropriate barriers for hazardous area deployment)

Application Context: This module bridges discrete field devices — pushbuttons, limit switches, relay contacts, solenoid valve coils — to the Foxboro I/A Series DCS backplane, enabling full digital control of on/off process equipment within the distributed control architecture

Defining Feature: 8-channel discrete I/O with full 500 VDC galvanic isolation per channel, LED diagnostic indicators, and seamless backplane integration into Foxboro I/A Series DCS controllers

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