| Customization: | Available |
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| Task: | Following |
| Signal: | Continuous |
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The Allen Brad-ley 1746-NR4 is an analog input module (RTD/resistance) with four inputs belonging to the SLC 500 series. The 1746-NR4 consumes a backplane current of 50 mA at 5 or 24 Volts. Its input types are platinum (100, 200, 500 or 1000 ohms) 385, platinum (100, 200, 500 or 1000 ohms) 3916, Copper (10 ohms)(426), 120 ohm nickel (618/672), 604 ohms nickel-iron ()518), 150, 500, 1000 and 3000 ohms resistance input.
The 1746-NR4 has a selectable temperature of one degree and 0.1 degree Celsius and a selectable filter frequency of 10 to 250 Hertz. The 1746-NR4 uses a maximum of 25 Ohms per 308.4 meters cable impedance. For data formats, the 1746-NR4 is compatible with raw/proportional, engineering units, engineering units x 10 and scaled-for-PID formats. The 1746-NR4 self-calibrates at power up and/or when a channel is enabled; it also has a user-calibration option.
The 1746-NR4 has an input to backplane isolation voltage of 500 Volts AC tested for 1 minute. It has a step response of 300 to 12 milliseconds depending on the filter frequency; the 10 Hertz filter frequency has a step response of 300 milliseconds while the 250 Hertz filter frequency has a step response of 12 milliseconds. For the 1746-NR4, the cut-off frequency ranges from 2.62 Hertz to 65.5 Hertz depending on the filter frequency.
The channel scan time for the 1746-NR4 ranges between 17 milliseconds and 305 milliseconds, depending on the filter frequency. The overall module scan time is calculated by multiplying the channel scan time with the number of channels activated. The 1746-NR4 has a minimum/maximum thermal dissipation of 1.50 Watts.
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