Emerson 12P4986X Relay Isolated Digital Input Module

Technical Specifications

Model：12P4986X

Brand：Emerson

Product Type：Relay Isolated Digital Input Module

Applicable System：Emerson DeltaV DCS system, petrochemical and thermal power plant control cabinet

Supply Voltage：12VDC LocalBus power

Interface：DeltaV rack backplane connector, field signal terminal block with relay isolation circuit

Common Revision：Multiple hardware revisions available

Status Indicator：On‑board LED for power supply, channel status and fault diagnostic status

Built‑in Function：Multi‑channel passive dry‑contact signal acquisition, relay galvanic isolation, suppress ground loop interference, channel fault detection, data interaction with DeltaV main controller, module self‑diagnosis, hot‑swap support

Working Temperature：0℃ ~ +60℃

Storage Temperature：‑20℃ ~ +70℃

Protection Class：IP20

Mounting：DeltaV rack slot‑in hot‑swappable installation

Weight：0.38kg

Product Brief:

12P4986X is legacy relay‑isolated digital input module for Emerson DeltaV DCS system. It adopts relay contact galvanic isolation design, effectively isolates potential difference interference between field‑side equipment and DCS backplane. It collects passive dry‑contact status signals from field relays, limit switches and auxiliary contacts. Relay isolation improves anti‑interference performance for complex industrial site conditions. It supports hot‑swap function, allowing online module replacement without rack shutdown. On‑board LED gives visual feedback of power, channel running and fault conditions. This is EOL discontinued spare part,widely used for maintenance and renovation of petrochemical and thermal power plant DeltaV DCS equipment. Please confirm hardware revision and rack compatibility before purchase. Strict ESD anti‑static protection shall be followed during installation and replacement。