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Allen Bradley | PLC-5 | 1771-IG | Image

Allen Bradley | PLC-5 | 1771-IG | Image Allen Bradley | PLC-5 | 1771-IG | Image

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The 1771-IG Digital DC Input Module is a product by Allen-Bradley that belongs to the PLC 5 series. The 1771-IG is mainly used for the conversion of DC signals that are provided by the user devices to the logic level signals that are needed for processing in the PLC processor system. The 1771-IG input module controls the corresponding bits state in the PLC data table with its ability to provide a modular design that guarantees space-saving and pocket-friendly means that are critical during the process of adding input into a PLC control system. The 1771-IG input module has a 1771-WC wiring arm for replacing the module without the need to disconnect the wiring system. The 1771-IG input module is a Series A module and therefore, it supports various I/O addressing that include ½, 1, and 2-slot addressing. The 1771-IG input module is useful in the TTL interfaces and BCD interfaces encoders.


The 1771-IG input module has 8 inputs in the 5V DC TTL voltage category and the 1771-IG input module also comes with an operating voltage range of 5.0 – 5.3V DC and it is TTL-compatible. The input signal delay for 1771-IG input module is less than 1ms, the maximum customer supply current per module is 500mA, and the backplane current load is 122mA. The maximum power dissipation for 1771-IG input module is 3.3W and it has a maximum thermal dissipation of 11.3 BTU/hr. The 1771-IG module has additional features like opto-electrical isolation for protecting the system circuits from electrical transients and an input filter that reduces electrical noise.

AB TTL Input Mod. 1771I
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