Intermec IF61 GPIO Terminal Block User's Guide - Page 17

Connecting Devices to the Output Terminals Each output terminal has four terminal posts: • 12 V • +Output • -Output • Gnd (Ground) The output terminals allow you to access the four general purpose outputs on the reader. Each output is optically isolated from the reader, polarized, and rated for 5 to 48 VDC at 0.25 A. All reader outputs include internal thermal fuses that trip if the load exceeds 0.25 A, and the fuses are self-recovering once the excessive load is removed. 12 VDC - + Reader interface Indicator LED +12 V +Output -Output (125 mA max.) Ground Reader Output Terminal Schematic: This illustration shows an output terminal. The +Output and +12 V posts are shorted by a jumper. Each terminal block output terminal includes a green indicator LED that you can enable or disable depending on system requirements. How the outputs are used depends on the RFID application software being used in the system. For example, the outputs can control indicator lamps that indicate good reads or errors. You need to coordinate the wiring of any output controls with the software developer. GPIO Terminal Block User's Guide 17