Intermec IF61 GPIO Terminal Block User's Guide - Page 21

Driving a DC Relay To Control an AC Load The reader outputs can only switch DC loads, but can drive relays that control AC loads as seen in the next illustration. AC motor -Output, 250 mA max. Ground External relay 120-230 VAC Driving a DC Relay: The external relay provides dry contacts for controlling the AC motor. Note: In many installations, the relay and AC wiring must be placed in an enclosure that meets local fire code regulations. Connecting Devices to the Power Terminal The power terminal provides access to DC power from the reader (except for IV7). The GPIO interface provides a total of 12 VDC at 0.5 A for powering external inputs and loads, eliminating the need for an external DC supply and simplifying the system installation. Each GPIO interface power has an internal thermal fuse that trips if the load exceeds 0.3 A, and the fuse is self-recovering once the excessive load is removed. The total load on the GPIO interface power must stay within the 0.5 A limit. When you design a system that uses this supply, be sure to complete a power budget assessment to ensure that the supply is adequate for the system. On the power terminal, two posts are available for +12 VDC and Ground. These posts are tied to each of the +12 V and Ground posts on the input and output terminals. GPIO Terminal Block User's Guide 21