Intermec IF61 GPIO Terminal Block User's Guide - Page 23

Connecting To the IV7 Vehicle-Mount Reader Connecting GPIO devices to the IV7 reader requires special considerations. The IV7 GPIO: • inputs are limited to 40 mA total. • outputs are limited to 50 mA total. • does not provide 12 VDC for powering external devices. To connect the terminal block and GPIO devices to the IV7, use a voltage conditioning network as shown in this sample schematic: External +12 VDC To light Gnd From sensor Serial port TB5-8 +12V Out + Out - TB1-4 In + In - Gnd Parts on main circuit board 10K PFET 10K TB9 +12V Gnd NFET High out from IV7 closes 12V switch to output 2K (if 12V input) Customer-supplied parts for voltage conditioning network Sample Voltage Conditioning Network for Connections to the IV7 The IV7 is connected to the GPIO terminal block only through the Out PLUS and In MINUS terminals. Do not connect the IV7 to any other terminals in the terminal block. GPIO Terminal Block User's Guide 23