AB 1771-OBN
The AB 1771-OBN is a digital DC input module in the Allen-Bradley 1771 I/O series. It is used to convert the DC signal sent by the user device to the logic level required by the controller. The module can directly control the status of the corresponding bits in the PLC data table. It is cost-effective and space saving, while allowing inputs to be added to the PLC control system.
The module’s 3.5 “x 6.5” x 2 “frame accommodates 4 sets of 8 input points (for a total of 32). The module is located in the receiver category from 1 to 6 V DC. The 1771-IBN module operates ON or OFF in the 1 to 3 V DC voltage range with an average delay of 6 (±2) milliseconds. It has a backplane current load of 28 mA and a current of 1.7 mA in the off state. For troubleshooting, there are 32 status indicators on the front panel of the module.
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