Relays
Relay Driver
The Relay Driver is a logic module which provides control functions such as high/low voltage alarms, load control and generator start for 12-, 24- or 48-volt battery systems. It controls four independent relay driver outputs by reading digital data inputs from Morningstar's TriStar controller or by reading battery voltage. Outputs can be used to operate any of the relays on this page or any other mechanical or solid state relay with a coil voltage that is the same as the battery voltage used to power the relay driver. Maximum current for each output channel is 750 mA.
The Relay Driver may be mounted to a DIN rail and is fully programmable with the
included PC software via serial RS-232 port connection. Dimensions are 6.4" x 3.2" x 1.3"
and weight is 0.4 lb. Terminals can accept 16- to 24-AWG wire. Self consumption is less
than 20 mA and the unit will operate from 8 to 68 volts DC. 3-year warranty.
| Model | Description | Item code |
|
RD-1 |
Morningstar Relay Driver |
020-01255 |
Solar Converters Inc.
Voltage-controlled switches
These are user-adjustable voltage-activated relays with SPDT (single pole, double throw) contacts rated for 30 amps. The relay coil in the "Active-High" version is powered when the voltage rises to the high set point. The relay in the "Active-Low" is powered when voltage drops to the low set point. The SPDT relay allows the voltage controlled switch to either connect or disconnect a circuit when it operates or to turn one thing on while turning another thing off.
Voltage settings are user-adjustable and can be read with a voltmeter. An active high relay can be used as a DC pump controller, a diversion load controller, or to operate a large relay for a high-powered charge controller. An active low can be used as a 2-wire generator start controller or as a low battery voltage load disconnect. These devices consume 17mA when off. Maximum switched current is 30A at 12/24 VDC, 3A at 48 VDC. VCS-1 measures approximately 3" x 5.3" x 1.75".
VCS-2 comes in a 5" x 7" x 2" enclosure. 1-year warranty.
| Model | Mode of operation | Enclosure | Item code |
|
VCS-1AH |
Active High |
No |
020-06218 |
|
VCS-2AH |
Active High |
Yes |
020-06215 |
|
VCS-1AL |
Active Low |
No |
020-06221 |
|
VCS-2AL |
Active Low |
Yes |
020-06224 |
SPDT 12V 40A relay
These single pole, double throw 40-amp enclosed relays are widely used in the automotive industry. Wires may be attached with 1/4" quick-connect terminals or the relay socket below may be used. Nominal operating current is 140mA. Relay socket has 2 feet of wire.
SPST N.O. 12V 75A relay
This enclosed single-pole, single-throw relay has one set of contacts that closes when power is applied to the coil terminals. It can be used to turn on 12-volt loads of up to 75 amps. Power terminals are 10-32 screws and coil terminals are ¼" quick disconnects. 300mA is nominal operating current.
DPDT 30A relays
These double-pole, double-throw relays can be used for up to 30 amps at 12 or 24 volts DC or 120/240 volts AC. All contact surfaces are silver alloy with gold flashing. Contact terminals are #8-32 screws and coil terminals are #6-32 screws. Relays with 120 VAC or 240 VAC coils can be used to build simple transfer switches. Relays with DC coils can be used for remote operation of pumps and fans. By connecting a relay with a DC coil to a voltage controlled switch, AC or DC loads may be turned on or off based on battery voltage levels.
Omron SPST 10 A Relay
This enclsed surface mount single-pole, single-throw relay has one set of contacts that closes when power is applied to the coil terminals. It can be used with an inverter or charge controller's 12 VDC auxiliary output to provide a contact closure for generator start or other controls. The terminals are quick-connect. It draws a small 44 mA coil current.
| Description | Coil current | Item code |
|
40 A SPDT 12V relay |
140 mA |
053-08290 |
|
Relay socket for 40 A relay |
-- |
053-08291 |
|
75 A SPST relay |
300 mA |
053-08293 |
|
DPDT 30A relay – 12VDC coil |
170 mA |
053-08281 |
|
DPDT 30A relay – 24VDC coil |
53 mA |
053-08287 |
|
DPDT 30A relay – 120VAC coil |
83 mA |
053-08278 |
|
DPDT 30A relay – 240VAC coil |
42 mA |
053-08284 |
|
Omron relay SPST 10 A 12 VDC coil |
44 mA |
053-08298 |