Allen Bradley 1746SC-INI4VI Isolated Analog Input Module for SLC 500

FAQ

Q1: What does the 1746SC‑INI4VI module do?
It provides four isolated analog input channels that can read either voltage or current signals within specified ranges on an SLC 500 system.

Q2: Which analog input ranges are supported?
Each channel can be independently set to voltage ranges (0–5 V, 1–5 V, 0–10 V, ±10 V) or current ranges (0–20 mA, 4–20 mA).

Q3: Is each channel electrically isolated?
Yes, the module provides high isolation (750 V DC) between channels and from field wiring to backplane, reducing interference and noise.

Q4: How precise are the input measurements?
The module has a 16‑bit resolution and accuracy of approximately ±0.25 % of full scale for voltage and ±0.10 – 0.25 % for current inputs.

Q5: What is the typical update time per channel?
Update time is about 14 ms for current inputs and about 18 ms for voltage inputs.

Q6: What are the physical dimensions and weight of this module?
Its size is approximately 5.5 × 1.3 × 5.7 in (140 × 33 × 145 mm) and weighs around 0.26 kg.

Q7: What environmental range does it support?
It is rated to operate from 0 °C to 60 °C (32 °F to 140 °F).

Q8: Is the 1746SC‑INI4VI still produced by Allen‑Bradley?
No, it is considered a legacy SLC 500 module and is generally discontinued, though available through remanufacturers or surplus markets.

1746SC-INI4VI Allen Bradley

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