ABB YPQ110A 3ASD573001A5 – High-Performance Industrial Safety Relay Module

If you’re working on machinery safety systems in automated production lines—especially in packaging, material handling, or conveyor applications—the ABB YPQ110A (model 3ASD573001A5) is one of those components that quietly does its job without drawing attention, until you really need it. It’s a safety relay module designed to monitor emergency stop circuits, guard interlocks, and two-hand controls, making sure operations halt safely when something goes wrong.

One thing I appreciate is how straightforward it integrates into existing ABB control ecosystems. You might notice that unlike some programmable safety controllers, this isn’t meant to replace logic solvers—it’s built for reliability in basic but critical safety functions. From my experience, plants tend to favor these hardwired relays where simplicity and fail-safe operation matter more than flexibility.

Key Features

• Dual-channel safety monitoring: Supports category 3/4 according to ISO 13849-1, capable of monitoring two independent input channels (like dual E-stops or interlock switches), which helps prevent accidental restarts.
• Forced-guided contacts: Internally, the relay uses forced-guided relay contacts (also known as positive-guided mechanisms), so if one contact welds, the others won’t falsely indicate a safe state—this is crucial for meeting PL e requirements.
• LED status indication: Clear visual feedback for power, channel activation, and trip conditions. In many cases, this cuts troubleshooting time significantly during maintenance rounds.
• Rail mounting (DIN EN 60715): Snaps onto standard 35mm TS35 rail, aligning neatly with other ABB S500 or modular terminal blocks—no special brackets needed.
• Reset functionality: Offers both manual (push-button) and automatic reset modes depending on wiring configuration, giving engineers flexibility based on machine access risk.

Technical Specifications

Application Fields

The YPQ110A shows up most often in environments where functional safety is non-negotiable but full PLC integration would be overkill. Think conveyor systems in distribution centers, automated assembly stations, or robotic cells with perimeter guarding. It’s also commonly used as a standalone safety monitor in retrofitted older machines that didn’t originally include modern safety architecture.

Some customers have told us they use it alongside light curtains or door interlocks on compact processing units—especially when space inside the cabinet is tight and every millimeter counts.

Advantages & Value

While not flashy, the real value here lies in consistency. In many cases, sourcing an authentic ABB safety relay like this avoids compatibility issues down the line—especially when replacing failed units in an existing panel. Since it’s part of ABB’s standardized component range, documentation and datasheets are readily available, which speeds up commissioning.

Procurement teams typically appreciate that it doesn’t require special software or licensing. No firmware updates, no password recovery headaches—just wire it and go. Over time, that kind of simplicity can mean lower downtime costs.

Installation & Maintenance

Mounting is straightforward—just clip it onto a clean TS35 rail. Make sure there’s at least 5 mm clearance above and below for ventilation, especially if grouped with heat-generating devices like motor starters. Wiring should follow standard practices: twisted pair for input signals, separate routing from high-voltage lines to avoid interference.

Periodic testing—say, quarterly—is recommended. Just press the test button or simulate a single-channel fault to verify the safety circuit drops out correctly. Dust accumulation can affect performance over time, so wiping it down during routine cabinet cleaning helps. There’s no calibration required, but do check terminal torque annually (typically 0.6 Nm).

Quality & Certifications

This unit carries CE marking and complies with key standards including:

• IEC 60947-5-1 – Low-voltage switchgear and controlgear
• EN 60204-1 – Safety of machinery – Electrical equipment of machines
• UL Recognized Component (File No. E176934)
• RoHS compliant (lead-free construction)

It appears that ABB maintains consistent build quality across batches, and we’ve seen very few field failures under normal operating conditions. Each unit comes with a 365-day warranty against manufacturing defects.