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The Allen-Bradley 1756-LSC8XIB8I is a versatile ControlLogix low-speed counter module featuring eight input points and capable of performing high-speed DC isolated sink/source input operations at a nominal 24V DC. It supports eight dedicated counters with a maximum counting frequency of 40 kHz, providing detailed counter metrics including accumulated count and instantaneous frequency, optimal for a wide range of applications. With a 31-bit capacity and a count range from 0 to 2,147,483,648, this module requires a compatible removable terminal block, either the 1756-TBS6H or 1756-TBCH, for connection to the ControlLogix chassis. It operates within a voltage range of 10 to 30V DC, drawing a current of 275 mA at 5.1V DC, and maintains a continuous isolation voltage of 250V while offering robust performance tested to high isolation standards. Additionally, it handles environmental conditions effectively, sustaining operations between 0 to 60 degrees Celsius and enduring vibration impacts of 2 g at various frequencies.