Use The Power Interface - Honeywell IF2B User Manual

+ Output
- Output
Ground
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.

Use 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 exter-
nal loads, and that power will be available at all +12 V pins on the GPIO port.
60
+ 12 V
External
relay
AC motor
120-230
VAC
IF2 Network Reader User Guide