ABB DSAO120 57120001-EY – High-Performance Digital Output Module for Industrial Automation

If you’re working on a System 800xA or AC 800M control setup, the ABB DSAO120 likely isn’t new to you. It’s a digital output module designed to handle discrete signal distribution with solid reliability in demanding environments. One thing I appreciate is how consistently it performs across batch processes—especially in chemical plants where timing and signal accuracy matter.

Key Features

• Digital Output Capability: Provides 16 isolated relay outputs, typically used for activating motors, valves, or alarms. The dry contact design means it works well with both AC and DC loads.
• High Isolation Voltage: Offers galvanic isolation up to 2300 V AC, which helps protect sensitive control circuitry during voltage spikes—a feature that seems to be particularly useful in power generation facilities.
• Modular Integration: Designed specifically for AC 800M controllers, it slots directly into the I/O rack without extra adapters. From my experience, this reduces wiring errors during commissioning.
• Status Indication: Each channel has individual LED indicators, making troubleshooting faster. You might notice that field technicians tend to favor this during maintenance rounds.
• Firmware & Configuration: Configured via Control Builder M, so if your team already uses ABB’s engineering tools, integration feels seamless.

Technical Specifications

Application Fields

The DSAO120 shows up most often in process automation settings—think oil refineries, water treatment plants, or pulp and paper mills. In many cases, it’s used to drive final control elements like solenoid valves or pump starters based on PLC logic. It also appears in power substations for breaker indication and auxiliary control, where electrical isolation is non-negotiable.

Advantages & Value

Procurement teams tend to stick with the DSAO120 not because it’s flashy, but because it minimizes downtime. Its compatibility with existing ABB ecosystems reduces training overhead and spares complexity. While it may cost slightly more than generic alternatives, the long-term savings from reduced fault-finding time and fewer replacements usually justify the premium. Plus, firmware updates are backward-compatible more often than not, which helps extend lifecycle planning.

Installation & Maintenance

Install it in a standard IP20 control cabinet with adequate ventilation—don’t stack modules too tightly. Make sure the DIN rail is properly grounded, and keep high-voltage wiring at least 10 cm away from signal lines to avoid noise coupling. During routine checks, verify relay operation under load every six months, especially if switching inductive loads. Cleaning dust buildup annually helps prevent overheating. Firmware should be checked periodically through Control Builder M; although the module doesn’t support online upgrades independently, it syncs with controller-level updates.

Quality & Certifications

This module carries CE, UL, and CSA certifications, meeting key industrial safety standards. It’s also RoHS compliant, so it fits within environmental compliance frameworks required by many EU-based projects. ABB typically backs it with a manufacturer warranty, and in our case, we offer a 365-day warranty from the date of delivery—covering defects in materials and workmanship, assuming proper installation conditions were met.

Our Order Placement Process and Guarantees

• Delivery Time: 1 week for in-stock units; no more than one month at the latest for backorders.
• Payment Method: 50% advance payment, balance due before shipment.
• Express Delivery: Shipped via FedEx, UPS, or DHL—tracking provided upon dispatch.