ABB

1.Main Functions

ABB Bailey IMDSI02 Digital Slave Input Module

16‑channel discrete digital signal acquisition: Collects contact closure, switch status and binary on‑off signals from field equipment; supports multiple input types: 24 VDC, 125 VDC, 120 VAC via dip‑shunt configuration on NTDI01 base.More products: www.plcva.com
Slave expander bus communication: Exchanges data with multi‑function processor (IMMFP series) through INFI‑90 slave expander backplane bus; transmits field on‑off status and module diagnostic information to DCS main controller.plcva.com

ABB Bailey IMDSI02 Digital Slave Input Module

Configurable signal filtering / debounce: Fast / slow response‑time selection for DC inputs, suppresses contact bounce and field transient interference, avoids false triggering of logic interlock.
Galvanic isolation protection: Dielectric isolation between field‑side circuit and DCS internal backplane, blocks industrial surge and electromagnetic noise, prevents field fault from damaging main control rack.
LED status indication: Front‑panel LED indicators show module running health and each channel input state for fast on‑site inspection and troubleshooting.
Hot‑swap support: Standard single‑slot rack installation; allows module online replacement without full‑system shutdown for continuous‑process plants.
Channel status diagnosis: Detects abnormal input state, reports fault flags to DCS controller for alarm processing.plcva.com
Termination‑unit dependent wiring: All field cables terminate on NTDI01 base; flat ribbon cable connects base to IMDSI02 module, simplifies cabinet wiring and maintenance.

ABB Bailey IMDSI02 Digital Slave Input Module

Process DCS digital‑input interface: Captures field binary status signals for INFI‑90 DCS control logic processing.
Thermal power industry: Monitors auxiliary equipment feedback signals for boiler and turbine systems: breaker auxiliary contacts, valve limit switches, pump / fan running status, emergency stop buttons, local alarm contacts.plcva.com
Petrochemical & refining industry: Gathers interlock‑related switch signals, pressure‑switch and level‑switch status for continuous chemical production units.
Pulp & paper, metallurgy industries: Collects equipment position and running feedback signals for production‑line interlock logic.
Safety interlock logic realization: Provides raw status inputs for equipment protection, startup‑permit and emergency‑trip interlock chains.plcva.com
Legacy‑DCS spare‑part replacement: Discontinued original Bailey spare I/O card, used for breakdown replacement, cabinet retrofit and service‑life extension of existing INFI‑90 installations. Brand‑new original spare for project‑site stock preparation.