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

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