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Relay Board Selector
Since,
VG400 soil moisture probes return low voltage analog signals
proportional to water content, by themselves they can't turn on alarms,
or interface directly to irrigation valves. For this reason,
Vegetronix offers a variety of relay boards which can be used in a
multitude of control applications.
Each
of the boards have LED indicators to indicate power, and the state of
the relay. Each board has either a solid state relay (TRIAC),
or a mechanical relay. All of the boards have terminal blocks
for easy connection, including a dedicated terminal block for
connecting to our soil moisture sensors.
A
simple jumper switch selects whether the relays closes contacts or
opens contacts with moisture detection. The on/off threshold is set
with a variable resistor, which is tunable with a small screw
driver.
These
boards are tailored for Vegetronix sensors, but can be used with any
analog sensor that is powered from 5V.
The
solid state relays are intended for driving AC loads only. The
mechanical relay boards can drive either AC or DC loads, and require an
DC power source.
The
latching relay board is perfect for controlling low power latching
sprinkler valves. Because it draws only a few µA, it can be
run for nearly a year from a single 9V battery.
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| Shopping |
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| Price |
$35.95 |
$39.95 |
$59.95 |
| Input
Voltage |
0 to 24 AC |
0 to 24V DC |
0 to 24V DC |
| Relay
Type |
TRIAC |
Mechanical |
Mechanical Latching |
| Relay
Load |
.6A 600V AC only |
5A at 250VAC OR DC |
10A at 250V AC or DC |
| Suitable
for battery operation |
No |
No |
Yes |
| Typical
Power |
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(65µA) |
| Applications |
Sprinkler valves. |
Pumps, Automation, Control |
Remote control, Low power battery operated valves,
Control of latching Valves. |
| Board
Size |
1.75"x1.75" (4.445cm x 4.445) |
1.75"x1.75" (4.445cm x 4.445) |
2.0"x1.75" (5.08cm x 4.445) |
| Product
Links |
VG-RELAY-AC |
VG-RELAY-DC |
VG-RELAY-LATCH |
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This board is
perfect for controlling traditional sprinkler valves or other AC loads
such as low power pumps. It interfaces directly to Vegetronix soil
moisture sensors. It can be wired in series to valves and
block watering events from a valve clock. In addition, since
it is AC powered it can directly draw it's power from the
clock. It has 2 LEDs to indicate that the board has power,
and the on/off state of the relay. It is not recommended for
DC or high power loads.
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This board is the
most general purpose relay board because it can drive either AC or DC
loads up to 5A. It
interfaces directly to Vegetronix soil moisture sensors. It is powered from a DC
source. It has 2
LEDs to indicate that the board has power, and the on/off state of the
relay.
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This board is
perfect for blocking irrigation clock pulses to latching valves.
Drawing only 60uA
during normal operation, this
board is perfect for applications where battery life is critical.
Because it uses a low power latching relay, it only requires a brief
pulse of current to update the state of the relay. It has 2 LEDs to indicate that the board has
power, and the on/off state of the relay. For low power mode the LEDs can be disabled
with a simple jumper switch.
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