AT-VCC-RELAY
10
Configuration
The relay has 4 terminals which vary in function depending on how the jumpers above the ports are set.
Place the jumpers as shown below, this can be done to a single connector or to both to create up to 4 independent
relays.
Single Pole, Single-Throw is best used when using a device with a simple open/close (off/on) circuit is being used.
Single Pole, Single-Throw (SPST)
NOTE:
Relays can only work up to a maximum of 24V and 500 mA current.
1
1
3
SPST
SPST
2
2
4
3
4
Place the jumpers as shown below, this can be done to a single connector or to both to create up to 3 independent
relays.
Single Pole, Double-Throw (SPDT)
1
2
3
SPST
SPDT
2
3
1
1
2
SPDT
SPDT
1
2
Single Pole, Double-Throw is best used when two circuits are going to one common, such as: switching between two
input circuits or selecting two power sources.
Relay