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MV-801 User Manual
Issue 1 Revision 1
Page 20
2.2.4 Example: Driving LEDs from the GPI Outputs
MV-801 GPI outputs have open collector drivers. There is a +5 V DC pin on the GPIO connector
to provide the power needed to drive LEDs or relays.
The following schematic is an example of the circuit needed to drive an LED by each GPI
output. MV-801 GPIO connector pin names and numbers are shown on the left.
Figure 9
Connecting LEDs to GPI Outputs
CAUTION
Electrostatic Damage
Static precautions must be observed when inserting and
removing cards.
150
Ω
150
Ω
150
Ω
150
Ω
+5 V DC Out
GPI Out 1
GPI Out 2
GPI Out 3
GPI Out 4
Pin 1
Pin 22
Pin 23
Pin 24
Pin 25
LED 1
LED 2
LED 3
LED 4
External Circuit
GPI Connector pins