Phoenix Contact – 2766973 (MCR-ADC 8‑I‑4‑BUS) – 8‑Channel Analog/Digital Convert

 Main Features

• Manufacturer & Model: Phoenix Contact MCR‑ADC 8‑I‑4‑BUS, part number 2766973  

• Functionality: Converts up to eight 4–20 mA analog signals into an 8-bit digital format and transmits over flat ribbon BUS interface  

• Signal Inputs: Each channel supports a 4–20 mA loop; can tolerate up to ±100 mA; input resistance ~50 Ω  

• Digital Output: 8‑bit digital bus output with per-channel output current up to 20 mA at ~21 V DC  

• Electrical Specs:

  • Supply: 20–30 V DC

  • Current consumption ~30–40 mA  

  • Accuracy: max transmission error ±1 LSB @ 25 °C; temperature effects ~0.002%/K (offset), ~0.01%/K (gain)  

• Performance: Limit frequency ~50 Hz; sampling rate ~3 kHz  

• Installation:

  • DIN-rail mountable; dimensions approx. 25 × 108 × 100 mm

  • Screw terminals for inputs and BUS; robust polyamide housing  

• Environment & EMC:

  • Ambient operating range: 0–55 °C

  • Built-in surge suppression on analog inputs

  • Complies with industrial EMC standards