Product Discription
The Allen-Bradley 1791-24B8 is an I/O module with 24 inputs and 8 outputs. It has 24 inputs in 3 groups of 8 per block and an ON-state input rating of 10 to 30 Volts DC voltage and a 2.5 milliamps minimum input current at 11 Volts which maxes out at 11 milliamps at 30 Volts DC. It has a maximum ON-state input voltage of 5 Volts DC at 1.5 milliamps and an input impedance of 3.4. The 1791-24B8 has an input signal delay of 1 millisecond ON, 5 milliseconds OFF (fast), and 1 millisecond ON and 18 milliseconds OFF (slow).
The 1791-24B8 has an output rating of 500 milliamps/1Amps at 30 to 60 degrees Celsius with a vertical mounting and 250 to 500 milliamps at 30 to 60 degrees Celsius with a horizontal mounting. It has a current that surges at 3 Amps for 50 seconds that keeps recurring after 2 seconds. The 1791-24B8 has an output OFF-state current of 1 milliamps at a drop voltage of 1 Volts and 0.5 milliamps of current leakage. It has an external power supply with internal protection which supplies voltage in the range between 19.2 and 30 Volts DC at a current of 300 milliamps. The 1791-24B8 has a maximum thermal dissipation of 58.1 BTU/hour and a maximum power dissipation of 17.1 Watts. It has an operational temperature range between 0 and 60 degrees Celsius (32 and 140 degrees Fahrenheit) at a relative humidity of 5 to 95% non-condensing. The 1791-24B8 measures 176.5 millimeters x 68.8 millimeters x 98 millimeters (6.95 inches x 2.7 inches x 3.85 inches) and it weighs 1.02 kilograms (2.25 pounds).
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