AT-VCC-RELAY-KIT
3
Installation Guide
Place the jumpers as shown below, this can be done to a single connector or to both to create up
to 3 independent relays.
When DPDT is selected within Velocity, it will create 2 relays that work simultaneously. If one
port is opened, the other will open at the same time. The DPDT is a variant of the SPDT and the
jumpers must be placed exactly as below to work.
Single Pole, Double-Throw (SPDT)
Double Pole, Double-Throw (DPDT)
C + + C
C + + C
C + + C
Both ports are set to
Contact Closure
Both ports are set to
Voltage Sensor
The ports are set to
Contact
Closure
for the
first two
ports and
Voltage Sensor
for the
last two
.
1
1
1
3
3
4
Sensor
The ports can be set to sense either voltage or contact closure. Contact closure will react to the
change in current, while voltage will react to voltage as low as +/- 3V or as high as +/- 24V.
1
2
SPST
SPDT
SPDT
DPDT
SPDT
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.
