The Allen-Bradley 1746-INT4 is a four-channel thermocouple and millivolt input module designed for the SLC 500 programmable logic controller (PLC) system. This module supports multiple thermocouple types, including J, K, T, E, R, S, B, N, C, and D, as well as millivolt input ranges of ±50 mV and ±100 mV, providing versatility for various temperature and process measurement applications. It features built-in cold junction compensation (CJC) to ensure accurate readings across a wide temperature range. The module offers a low-pass digital filter with a corner frequency of 8 Hz, enhancing signal stability by attenuating high-frequency noise. With a step response time of 600 milliseconds at 8 Hz, it delivers reliable performance in dynamic environments. The 1746-INT4 operates within a temperature range of 0°C to 60°C (32°F to 140°F), making it suitable for diverse industrial settings. It requires a backplane current of 110 mA at 5 V DC and 85 mA at 24 V DC, ensuring efficient power consumption. Designed for chassis mounting, this module integrates seamlessly into the SLC 500 system, facilitating straightforward installation and maintenance. Its robust isolation capabilities, including 1000V DC transient or 150V AC continuous between channels and backplane, ensure reliable operation in electrically noisy environments. The 1746-INT4 is ideal for applications such as industrial temperature monitoring and control systems, process automation, and integration with thermal processing equipment.
