User's Manual

GV200 User Manual
TRACGV200UM001 - 21 -
Figure 16: The example connection to drive a relay
Note: All outputs are internally pulled up to PWR pin by a diode. So no external flyback diode
is needed when the output is connected to an inductive load.
If the digital output is used to drive a relay, a catch diode is showed across the relay coil, this
is necessary to prevent damage to the digital output when the relay is turned off. Many
modern relays come with this diode pre-installed internal to the relay itself. If the relay has
this diode, insure the proper relay polarity connected is used. If this diode is not internal, it
should be added externally. A common diode such as a 1N4004 will work in most
circumstances.