Description
ABB DC522 B4 DIGITAL INPUT/OUTPUT MODULE 1SAP240600R0001 (USED)
ABB GROUP
DC522 B4
DIGITAL INPUT/OUTPUT MODULE
1SAP240600R0001
16DC, 24VDC/0.5A,
2-WIRE, 24VDC 200W
MADE IN GERMANY
REF.NO: FKM11468
The ABB DC522 B4 is a digital input/output module designed for use with ABB’s AC500 PLC platform, a widely deployed programmable logic controller series in marine and industrial automation. Onboard vessels, digital I/O modules of this type serve as the interface between field devices — sensors, actuators, switches, and solenoids — and the control system, making them essential components in engine room automation, alarm & monitoring systems, cargo handling controls, and auxiliary machinery management. The DC522 B4 supports 16 digital channels and operates on a 24 VDC supply, suitable for integration into distributed or centralised control architectures found across commercial and offshore vessels.
Key Features
✓ ABB AC500 compatible: Designed for the AC500 PLC family, enabling direct integration into existing ABB automation architectures without additional adapters or converters.
✓ 16 digital I/O channels: Handles multiple field signals simultaneously, reducing module count and simplifying cabinet layouts in marine control panels.
✓ 24 VDC 2-wire configuration: Supports standard 2-wire field wiring common in marine installations, minimising cable complexity and installation time.
✓ 0.5A output current per channel (typical): Rated output suitable for driving solenoid valves, relays, and indicator lamps typical of shipboard control circuits — subject to confirmation against specific configuration.
✓ Made in Germany: Manufactured to ABB’s industrial quality standards, supporting reliability in demanding marine environments with vibration, humidity, and temperature variation.
Marine Applications
Engine room automation — interfacing with pumps, fans, valves, and motor starters via discrete on/off signals managed by the PLC.
Alarm & monitoring systems — receiving digital status inputs from bilge level switches, high-temperature contacts, pressure switches, and other protective devices.
Cargo and ballast control — managing solenoid valve actuation and position feedback signals within automated ballast or cargo pump systems.
Auxiliary machinery control — integration into HVAC, compressor, separator, and purifier control loops where discrete I/O is required.
Retrofit and upgrade projects — replacing end-of-life or obsolete digital I/O modules in existing AC500-based shipboard installations to restore full system functionality.
Why Marine Engineers Choose
The ABB DC522 B4 is a trusted module within the AC500 ecosystem, valued for its straightforward integration, robust construction, and compatibility with a large installed base of ABB PLCs on commercial, offshore, and naval vessels worldwide. Its availability as a stocked spare reduces vessel downtime during unplanned failures or scheduled maintenance.
Ideal For
Cargo vessels, tankers, offshore support vessels, platform supply vessels, dredgers, ferries, and any commercial vessel operating ABB AC500 PLC-based automation systems in engine room or deck control applications.
Technical Support & Compliance
We provide complete solutions including remote troubleshooting, onboard technical support, testing and commissioning, repair, retrofit and upgrade, and full integration support for ABB PLC-based systems. To confirm compatibility with your installation, please share nameplate photos, part numbers, system drawings, the PLC model and firmware version, vessel name or IMO number, and the scope of your requirement. All compatibility and suitability assessments are subject to confirmation based on the information provided.
