Description
EMERSON
FISHER-ROSEMOUNT
12P3275X022
DO SERIES 2 DISCRETE OUT 32 CH. 24 VDC HIGH SIDE
KJ3204X1-BA1
REV.B
G8201406/A
FISHER-ROSEMOUNT SYSTEMS
LOCAL BUS POWER RATING: 12VDC, 150mA
BUSSED FIELD POWER RATING: 24 VDC, 3.2 A/CARD
FIELD CIRCUIT RATING: 24VDC, 100mA/Ch
AMBIENT TEMPERATURE: -40 TO 70C
KEY POSITION: B 4
The Emerson Fisher-Rosemount 12P3275X022 is a 32-channel high-side discrete output I/O module belonging to the DO Series 2 range, designed for use within DeltaV distributed control system (DCS) architectures. Configured as part number KJ3204X1-BA1 Rev.B, this module drives 24VDC field devices such as solenoid valves, relay coils, and actuator interfaces across 32 independent output channels. Its wide ambient temperature rating of -40°C to 70°C makes it well suited to the demanding thermal environments found onboard commercial vessels, offshore platforms, and industrial marine installations. As a PLC & HMI category component, it plays a critical role in automated process control, machinery management, and safety system actuation.
Key Features
✓ 32-channel high-side discrete output: Provides 24VDC switched outputs at 100mA per channel, with a bussed field power rating of 24VDC at 3.2A per card, enabling direct actuation of field devices without additional relay stages.
✓ Local bus power supply: Operates from a 12VDC local bus at 150mA, integrating cleanly into DeltaV I/O subsystems with defined power budgeting requirements per card slot.
✓ Wide operating temperature range: Rated from -40°C to +70°C ambient, supporting reliable operation in engine rooms, machinery control rooms, and other thermally variable onboard environments.
✓ DeltaV Series 2 I/O compatibility: Designed to key position B 4, ensuring correct physical and electrical alignment within compatible DeltaV carrier and I/O bus assemblies — subject to confirmation against the specific system configuration.
✓ Replacement & retrofit consideration: Rev.B designation indicates a specific hardware revision; when sourcing for replacement, verifying the revision level against the installed system baseline is recommended to ensure full compatibility.
Marine Applications
✓ Cargo & ballast control systems: Used in DeltaV-based automation platforms managing valve actuation sequences for cargo loading, water ballast transfer, and tank management aboard tankers and bulk carriers.
✓ Machinery management systems: Supports discrete output signalling for engine room automation, including pump start/stop commands, alarm relay actuation, and auxiliary machinery control on merchant vessels.
✓ Offshore platform process control: Deployed in DCS installations aboard FPSOs, drilling rigs, and production platforms where reliable high-density discrete output is required for process valve and shutdown system interfaces.
✓ Safety instrumented system (SIS) integration: Provides output channel capacity within broader safety and control architectures where segregated, verifiable discrete outputs are required for actuator control — subject to system-level safety validation.
✓ Vessel automation upgrades & spares: Held as a critical onboard or shore-based spare for DeltaV-equipped vessels to minimise control system downtime during scheduled maintenance or unplanned I/O card failure.
Why Marine Engineers Choose
The Emerson Fisher-Rosemount DO Series 2 discrete output module is a well-established I/O component within DeltaV automation environments, valued for its high channel density, defined power characteristics, and compatibility with a widely deployed control platform. Its robust temperature tolerance and straightforward integration into existing carrier assemblies make it a practical choice for both planned maintenance and emergency spares management aboard DCS-controlled vessels.
Ideal For
Tankers, bulk carriers, container vessels, FPSOs, offshore drilling rigs, production platforms, LNG carriers, and any vessel or installation operating a Fisher-Rosemount or Emerson DeltaV distributed control system requiring discrete output I/O module replacement or expansion.
Technical Support & Compliance
Technical assistance is available to support compatibility verification, system integration, onboard commissioning, and retrofit planning for this module within existing DeltaV control architectures. Support can extend to remote troubleshooting, functional testing guidance, and advice on revision-level compatibility — all subject to confirmation. To confirm suitability for your application, please share the existing card part number and revision, carrier assembly details, DeltaV system version, nameplate photographs, any relevant loop drawings or I/O assignment documentation, and where applicable the vessel name, IMO number, and scope of the intended installation or replacement works.
