The Allen-Bradley 1734-IE8C is a POINT I/O 8-channel high-density analog current input module that accepts 4-20 mA or 0-20 mA signals with 16-bit resolution (0.32 µA/count) via Delta-Sigma ADC conversion. With 0.1% full-scale accuracy at 25°C and selectable notch filters (50-480 Hz), it offers configurable update rates from 50 ms to 480 ms per module. Each channel is individually configurable with onboard data alarming and channel-level diagnostics including over/under-range detection. The module requires a 1734-TB3 or 1734-TB3S wiring base and is factory calibrated. Typical applications include process transmitter monitoring, pressure/flow/level sensor interfacing, and any industrial automation system requiring precise 4-20 mA signal acquisition in a compact distributed I/O form factor.
**Q: Does the 1734-IE8C support voltage or RTD inputs?**
A: No, the 1734-IE8C is a current-only input module supporting 4-20 mA and 0-20 mA signals. For voltage inputs, use 1734-IE8V; for RTD/thermocouple, use 1734-IR2 or 1734-IT2I.
**Q: Does the 1734-IE8C support HART protocol?**
A: No, standard 1734-IE8C does not support HART pass-through. Use the 1734-IE8CH variant for HART communication.
**Q: What notch filter setting should I use for 50 Hz power systems?**
A: Select the 50 Hz notch filter for optimal 50 Hz noise rejection (update rate: 480 ms per module, 60 ms per channel step response).
**Q: Can I mix 4-20 mA and 0-20 mA configurations on different channels?**
A: Yes, each of the 8 channels can be individually configured for either 4-20 mA or 0-20 mA range.
**Q: Is the module field-calibratable?**
A: The module is factory calibrated and does not require field calibration, but user calibration is supported through Studio 5000/RSLogix 5000 software if needed.
