Small Signal 2-Channel 2A SPDT Latching Relay Board: RLYLA102
- Two SPDT latching relays and drivers
- Convenient for low-power data acquisition & signal switching projects
- Available in 5V, 12V, and 24V coil voltages
- Screw terminals provide quick and easy relay wiring
- Accepts logic level control inputs
- LED indicator for status of each relay coil
- Relay contacts rated up to 2A at 30VDC, 1A at 125VAC
- Gold-clad contacts suitable for low-level signals down to 10uA
- Rated for resistive loads (not inductive loads / motors)
- Available in rubber feet or DIN rail mount
General Description
Featuring gold-clad relay contacts that will not oxidize or tarnish, this latching relay board provides a convenient way to switch low-level signals in your data acquisition project (e.g., multiplexing sensors being read with a single ADC input). Due to the latching relays, it is particularly well-suited to low-power applications since the coils only have to be energized when switching the relays from one state to the other. This board is also suitable for use in automated failure-injection testing (e.g., short-open testing for sensor harness FMEA verification).
This board includes two SPDT latching relays, logic-level relay driver circuits, and protection diodes. Simply provide the board with power, connect your logic-level signals to the inputs, and the relay contacts are ready to use. The relay contacts are electrically isolated from the rest of the board, which allows the board to be used in a wide variety of low-current applications, including both AC and DC loads.
As with any latching relay, note that the relay may be in either the SET or RESET state when initially received. The relays will be in the RESET state when sent out from Winford Engineering. However, during shipping, it is possible that any given relay could end up in either the SET or RESET state.
With this relay board, logic-level signals (e.g., 3.3V or 5V) or higher-voltage signal (up to 25V) can be used to control each relay. Each relay is controlled with a SET signal and a RESET signal, and the activation status of each coil is shown with an indicator LED. Examples of logic-level signals include the outputs of an I/O card or a microcontroller's output pins (e.g., Arduino or Raspberry Pi). Please refer to the product datasheet for details and additional information.
The board is available with three different relay coil voltages (5, 12, 24 VDC), allowing you to choose whichever is most conveniently available for your project. Suitable wall power supplies for the 5V and 12V models are available below.
Please note that the relay coil voltage you select has no effect whatsoever on the voltages you can switch with the relay contacts. Also note that the relay coil voltage you select does NOT affect what voltage is needed for the input control signals. For any of the coil voltage options (5, 12, or 24V), an input control signal from 2.0VDC up through 25VDC will activate the relay. See datasheet for input current requirements.
Mounting Options
These products are available in two different mounting variants. Product numbers ending with -DIN come with DIN clips already installed and ready to snap onto 35mm or 32mm DIN rail. Product numbers ending with -FT have stick-on rubber feet installed on the bottom side, allowing for benchtop use or panel mounting. For panel mounting, we suggest 1/4" nylon standoffs under the mounting holes, and #6 screws.RLYLA102-5V-DIN
Click image to enlarge. Rail not included
RLYLA102-5V-FT
Click image to enlarge.Product Documents
| Part # | Description | Data Sheet | PDF Drawing | DWG Drawing | IGES Model | STEP Model |
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| RLYLA102-xxV-DIN | 2-Channel Latching Relay Board, DIN Mount | 
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| RLYLA102-xxV-FT | 2-Channel Latching Relay Board, Rubber Feet |
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2-Channel Latching Relay Board, DIN Mount
2-Channel Latching Relay Board, Rubber Feet
Product Details
- Two SPDT latching relays and drivers
- Available in 5V, 12V, and 24V coil voltages
- Accepts logic level control inputs
- LED indicator for status of each relay coil
- Relay contacts rated up to 2A at 30VDC, 1A at 125VAC
- Gold-clad contacts suitable for low-level signals down to 10uA
- Rated for resistive loads (not inductive loads / motors)
- Screw terminals for control inputs (accepts 16-26 AWG wire)
- Screw terminals for contacts (accepts 16-30 AWG wire)
- 0.1" header provided for input control signals (in addition to screw terminals)
- Power supply may be connected via DC power jack or via screw terminals.
- Approximate dimensions: 3.4" x 3.0"
- Available in rubber feet or DIN rail mount
Pricing and Ordering
| Product # | Description | 1+ | 10+ | RoHS | Buy Now |
|---|---|---|---|---|---|
5V Power: |
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| RLYLA102-5V-DIN | Relay Board, TTL, Latching Relays, 2A SPDT, 2 relays, 5V DC, DIN Rail Mount | $35.35 | $33.80 | Yes | |
| RLYLA102-5V-FT | Relay Board, TTL, Latching Relays, 2A SPDT, 2 relays, 5V DC, Feet | $33.80 | $32.25 | Yes | |
| WSD050-10-0 | Wall Power Supply, Switching, 5V DC, 1A, 5.5 x 2.1mm Barrel, Center Positive, 90-264V AC Input | $6.95 | $6.50 | Yes | |
12V Power: |
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| RLYLA102-12V-DIN | Relay Board, TTL, Latching Relays, 2A SPDT, 2 relays, 12V DC, DIN Rail Mount | $35.35 | $33.80 | Yes | |
| RLYLA102-12V-FT | Relay Board, TTL, Latching Relays, 2A SPDT, 2 relays, 12V DC, Feet | $33.80 | $32.25 | Yes | |
| WSD120-04-0 | Wall Power Supply, Switching, 12V DC, 0.4A, 5.5 x 2.1mm Barrel, Center Positive, 90-264V AC Input | $6.95 | $6.50 | Yes | |
24V Power: |
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| RLYLA102-24V-DIN | Relay Board, TTL, Latching Relays, 2A SPDT, 2 relays, 24V DC, DIN Rail Mount | $35.35 | $33.80 | Yes | |
| RLYLA102-24V-FT | Relay Board, TTL, Latching Relays, 2A SPDT, 2 relays, 24V DC, Feet | $33.80 | $32.25 | Yes | |
| Quantity | Price |
|---|---|
| 1+ | $35.35 |
| 10+ | $33.80 |
| Quantity | Price |
|---|---|
| 1+ | $33.80 |
| 10+ | $32.25 |
| Quantity | Price |
|---|---|
| 1+ | $6.95 |
| 10+ | $6.50 |
| Quantity | Price |
|---|---|
| 1+ | $35.35 |
| 10+ | $33.80 |
| Quantity | Price |
|---|---|
| 1+ | $33.80 |
| 10+ | $32.25 |
| Quantity | Price |
|---|---|
| 1+ | $6.95 |
| 10+ | $6.50 |
| Quantity | Price |
|---|---|
| 1+ | $35.35 |
| 10+ | $33.80 |
| Quantity | Price |
|---|---|
| 1+ | $33.80 |
| 10+ | $32.25 |
All of the above items are normally stocked. Please call us if you need to verify availability for a specific quantity, or for pricing at higher quantities. Please visit our ordering page for our ordering policies and a list of ordering methods.