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Chapter 5 — Using the IF2 GPIO Interfaces

80 IF2 Network Reader User’s Manual

Driving a DC Relay: The external relay provides dry contacts for controlling the

AC motor.

Using the Power Interface

The IF2 GPIO interface provides 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.

The GPIO interface power has an internal thermal fuse that trips if

the load exceeds 0.5 A. 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 the GPIO interface power,

be sure to complete a power budget assessment to ensure that the

supply is adequate for the system.

If your system needs more than +12 VDC at 0.5 A, you can connect an

external power supply to the +12 V and Ground pins. The external

supply powers the external loads, and that power will be available at

all +12 V pins on the GPIO port.

AC motor

120-230

VAC

External

relay

+ Output

+ 12 V

Ground

- Output

Note: In many installations, the relay and AC wiring must be placed

in an enclosure that meets local fire code regulations.

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Intermec IF2 Bedienungsanleitung Seite 90