M.D. Micro Detectors – URD/0A – Dual-Channel Photoelectric Sensor Amplifier

The M.D. Micro Detectors URD/0A is a rugged, dual-channel amplifier unit designed for use with emitter–receiver photoelectric sensors. Powered by 24 VAC, this plug-in module offers relay output plus alarm output, adjustable gain, LED indicators, and optional timing—ideal for precise object detection in industrial automation or packaging systems.

Key Features:

• Model: URD/0A (UR series, Vac supply, relay + alarm, no timer)  

• Brand: M.D. Micro Detectors (Italy)

• Supply: 24 VAC ±10%, ≤ 1.5 VA  

• Sensor Inputs: Supports two 3-wire emitter–receiver photoelectric sensors  

• Outputs: Dual SPDT relays (NO/NC) + internal alarm relay  

• Indicators: LEDs for Power (green), Output (red), and Stability/Alarm (green/red)  

• Adjustments:

  • Stability trimmer for alignment feedback

  • Sensitivity selector (Hi/Lo gain)

• Mounting: Plugs into 11-pin undecal socket (e.g., STZ3) for easy panel integration  

• Housing & Protection: Rugged Noryl enclosure; IP20 rated for industrial environments  

• Operating Range: –10 °C to +50 °C; switching frequency up to 10 Hz; ~150,000 relay cycles