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The Allen Bradley 1771-OB is a robust DC Output Driver Module designed to efficiently control DC motor starters, indicators, and solenoids, drawing 165 mA from its power supply via the 1771 I/O backplane. Featuring 8 outputs with an input voltage range of 10 to 27 Volts DC, each output supports up to 1.5 A, maintaining a total module limit of 8 A while offering a 4 A surge capacity repeatable every second. Engineered for reliability, it operates within temperature ranges of 32 to 140 degrees Fahrenheit (0 to 60 degrees Celsius) and withstands non-operational extremes of -40 to 185 degrees Fahrenheit. The modules performance includes a maximum power dissipation of 16.9 Watts and an efficient thermal dissipation capability, ensuring durability in demanding environments.