Ovation DCS I/O cabinet expansion for 125V field devices

Basic Information

Manufacturer: Emerson Automation Solutions

Series: Ovation DCS

Origin: United States

Function: Monitors 32 channels of discrete on/off signals from high‑voltage field devices (switches, relays, contactors); converts 125 VAC/VDC input levels to logic signals for the Ovation control system.

Weight: Approx. 0.7 kg

Status: Original new / refurbished available

Warranty: 12 months

Specifications

Channel Count: 32 single‑ended digital inputs

Input Voltage Levels: 125 VAC/VDC (nominal, 50/60 Hz)

Logic Thresholds:

ON: ≥90 VAC/VDC

OFF: ≤40 VAC/VDC

Isolation: 1500 Vrms (channel‑to‑backplane)

Input Impedance: ≥20 kΩ per channel (high‑voltage rated)

Response Time: ≤15 ms (typical)

Operating Temp: 0°C to 60°C

Storage Temp: -40°C to 85°C

Humidity: 5%–95% non‑condensing

Bus Interface: Ovation I/O bus (hot‑swap capable)

Connector: 50‑pin edge connector (mates with 1B30035H01 / 1B30053H01‑2 bases)

Key Features

32‑point high‑voltage density reduces cabinet space and wiring cost for 125V systems

Designed for 125 VAC/VDC field circuits (common in power plants and heavy industry)

High‑impedance inputs minimize loading on high‑voltage field contacts

LED status indicators per channel (ON/OFF) for quick troubleshooting

Hot‑swap compatible (replace module online without system shutdown)

Advanced diagnostics: open‑circuit detection, voltage fault logging, overvoltage protection

Backward compatible with all Ovation DCS revisions

Industrial‑grade surge and ESD protection for harsh high‑voltage environments

Application Fields

Power generation (thermal, combined‑cycle, nuclear) – 125V control circuits

Petrochemical, refining, and gas processing – high‑voltage interlock systems

Monitoring of high‑voltage limit switches, pressure switches, level switches

Motor control centers (MCC) and relay logic interfaces (125V coils)

Safety interlock and alarm system inputs (high‑voltage rated)

Ovation DCS I/O cabinet expansion for 125V field devices