Part Code Definition

1C31xxx: Ovation compact remote I/O series prefix

179: exclusive code for RIO link controller master card

G01: first generation hardware revision

Technical Specifications

Backplane 5VDC power supply, typical power consumption 5.2W;

Dedicated RIO field bus port based on RS485 differential transmission, max bus length 1200m, up to 31 slave remote I/O racks cascaded;

Bus communication rate fixed 19200bps with built-in hardware CRC error check;

1500VAC isolation between field bus circuit and system internal backplane bus;

Working ambient: -40℃~+70℃, 5%~90%RH non-condensing, supports hot plug in standard Ovation rack;

Dimension:45×158×272mm, net weight approx 0.37kg.

Interface & Communication Layout

Rear golden finger connects chassis backplane for Ovation internal control bus data exchange;

Front terminal port for shielded RS485 trunk wiring to subordinate remote I/O cabinets;

Front panel LED indicators: RUN normal operation lamp, FAULT module failure lamp, COM bus communication status lamp.

Core Functions

Master scheduling of entire remote I/O bus, cyclic polling all downstream slave I/O modules;

Forward field collected AI/DI data upward to Ovation main controller, distribute DCS downlink DO/AO control commands to remote I/O racks;

Full bus fault diagnosis: bus short/open, slave rack offline, module abnormal, fault codes automatically uploaded to DCS for system alarm record;

Online bus node address & communication parameter configuration via Ovation engineering software without module offline;

Single slave rack fault isolated without affecting operation of other remote stations on the same bus.

Application Scenarios

Thermal power plant boiler auxiliary equipment remote I/O cabinet, turbine auxiliary system distributed signal collection; petrochemical on-site field separation cabinet remote I/O expansion, old DCS renovation spare stocking.

Operation & Maintenance Notes

RIO trunk uses double-core shielded twisted cable, single-point shielding grounded inside main control cabinet;

Install 120Ω terminal matching resistor at the two extreme ends of RS485 bus; separate bus cable from high-power AC cable to eliminate EMI interference;

Regularly inspect terminal tightness and bus online status; replace module when persistent total bus communication breakdown after field wiring troubleshooting.