Operation Theory
31
4.2.1 Common Ground (Sinking Current)
To connect these signals, connect an external +5 V to +30 V
DC
power supply to <VDDm>, connect <IGND> to ground, and cross
the load between <I_DOn> and <VDDm>. Please note that when
the load is of an “inductance nature” such as a relay, coil or motor,
the <VDDm> pin must be connected to external power supply. The
extra connection is utilized for the “fly-wheel diode” to form a cur
-
rent-release closed loop, so that the transistors are protected from
any high reverse voltage which can be generated by the induc
-
tance load when the output is switched from “ON” to “OFF”.
Figure 4-2: Common Ground Output Architecture Block Diagram
DC
Load
+5V~+35V
-
IGND
VDD m
+
V5V
DC-DC
Convertor
I_DO n
6743X series Digital Output
- Common Ground
Summary of Contents for 6743X Series
Page 42: ...36 Getting Service...
