Description

The ABB 07EA90-S (Order No.: 3BSE008570R1) is a 16-channel digital output (DO) module designed for use with ABB’s AC 800M programmable logic controller (PLC) and integrated into the System 800xA distributed control system (DCS). Unlike solid-state outputs, the 07EA90-S features electromechanical relays with Form C (changeover) contacts, enabling direct switching of both AC and DC loads—including motor contactors, solenoid valves, alarm horns, and indicator lamps—without requiring external interposing relays.

Each channel supports up to 2 A at 250 VAC / 30 VDC, with full galvanic isolation between field circuits and the internal logic bus. The module includes LED status indicators for real-time diagnostics and integrates seamlessly with ABB’s terminal units (e.g., TU851) for secure field wiring.

Application Scenarios

At a natural gas processing plant in Texas, engineers needed to upgrade legacy solid-state output cards that failed repeatedly when driving inductive loads like valve solenoids. Voltage spikes from coil collapse damaged semiconductor outputs, causing uncommanded valve closures and safety shutdowns. The team replaced them with the ABB 07EA90-S, leveraging its robust relay contacts and built-in arc suppression. Within six months, output-related failures dropped to zero. Maintenance crews now use the front-panel LEDs to instantly verify command status during loop checks—reducing troubleshooting time by 60%. In applications where load flexibility and fail-safe operation matter, the ABB 07EA90-S isn’t just an interface—it’s a reliability multiplier.

 

Technical Principles and Innovative Values

Innovation Point 1: Universal Load Compatibility – The ABB 07EA90-S’s relay contacts can switch AC or DC, resistive or inductive loads—unlike transistor or triac-based DO modules limited to specific voltage types. This eliminates the need for external interposing relays, reducing panel space and failure points.

Innovation Point 2: True Fail-Safe Behavior – Upon power loss or module fault, relays de-energize to a known state (typically “off”), supporting safety-critical designs where uncontrolled output persistence could be hazardous (e.g., emergency vent valves).

Innovation Point 3: Visual & Remote Diagnostics – Each channel’s LED provides immediate local feedback, while the module reports status to System 800xA for HMI alarming and historical logging—enabling predictive maintenance based on relay cycle counts.

Innovation Point 4: Seamless ABB Ecosystem Integration – The 07EA90-S is fully supported in Control Builder M (for AC 800M programming) and System 800xA Asset Optimization, ensuring consistent configuration, diagnostics, and spare parts management across the automation lifecycle.

Application Cases and Industry Value

A Scandinavian district heating utility uses the ABB 07EA90-S to control circulation pump starters and zone isolation valves across 12 substations. The relay outputs directly switch 230 VAC contactor coils—no intermediaries. During a winter cold snap, one substation experienced repeated grid fluctuations; solid-state alternatives would have failed, but the 07EA90-S continued operating reliably. Over five years, the utility reported zero output module replacements, saving over €40.000 in maintenance and downtime costs.

In a pharmaceutical cleanroom, the same module triggers HEPA fan alarms and door-lock releases. Its deterministic de-energization on fault ensures safety systems default to secure states—meeting GMP and ISO 14644 requirements without additional hardware.

Related Product Combination Solutions

ABB TU851: Standard terminal unit – pairs with 07EA90-S for screw-terminal field wiring

ABB AC 800M PM864: Controller CPU – communicates with 07EA90-S via CI854 communication module

ABB 07AA91: Analog input module – often installed alongside 07EA90-S in mixed I/O racks

ABB 07DC90: 16-channel digital input module – complements 07EA90-S for full I/O coverage

ABB System 800xA: DCS platform – provides unified engineering, HMI, and asset management

ABB 3BSE008571R1: 07EA91 – higher-voltage variant (5A) for heavy-duty loads

Phoenix Contact PLC-RSC-24DC/21: Competitor relay module – but lacks native ABB integration

ABB Ability™ Asset Performance Management: Cloud service – can track relay actuation cycles for predictive replacement

Installation, Maintenance, and Full-Cycle Support

Installation involves plugging the ABB 07EA90-S into a compatible I/O carrier (e.g., in a local or remote I/O station), then connecting it to a TU851/TU854 terminal base. Field wires are secured to screw terminals rated for 0.2–2.5 mm² conductors. Always verify that connected loads do not exceed 2 A per channel and include surge suppression for inductive devices.

Maintenance is minimal: relays are sealed and require no lubrication. Technicians should periodically inspect for contact wear in high-cycle applications (>10.000 ops/year). The LED indicators allow quick verification during functional safety tests.

We supply only 100% genuine ABB 07EA90-S (3BSE008570R1) modules, each tested for contact resistance and logic integrity. Our support includes firmware compatibility checks, obsolescence alerts, and rapid exchange programs. With global inventory and deep expertise in ABB automation architecture, we ensure your output layer remains as dependable as your control strategy.

Contact us for a customized solution—whether you’re expanding an AC 800M system, replacing aging I/O, or securing long-term spares for critical infrastructure, the ABB 07EA90-S delivers versatile, reliable, and future-proof digital output capability.