4-Channel SPDT Low-Current Relay Board: RLP304
- Four SPDT relays
- Screw terminal connections
- Relay coils directly connected to input-side screw terminals
- LED indicator for each relay
- Relay contacts rated for 2A at 30VDC, 1A at 125VAC
- Gold-clad contacts suitable for low-level signals down to 10uA
- Available in rubber feet or DIN rail mount
General Description
Featuring gold-clad relay contacts that will not oxidize or tarnish, this 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). It is also suitable for use in automated failure-injection testing (e.g., short-open testing for sensor harness FMEA verification).
This board includes four SPDT relays with convenient screw terminal connections, and includes a protection diode (across the coil of the relay) and indicator LED for each relay. The relay contacts are electrically isolated from the rest of the board, which allows the board to be used in a wide variety of applications, including both AC and DC loads. This board does not include any relay driver circuitry, but instead has direct screw terminal connections to the coils and contacts of the relays, making it well-suited for being controlled by a PLC or similar device. For a similar board with built-in driver circuitry, please click here.
The board is available as a standard product with 24V DC relay coils. If a different relay coil voltage is needed for your particular application, please contact us for additional options. Please note that the relay coil voltage has no effect whatsoever on the voltages you can switch with the relay contacts.
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.RLP304-24V-DIN
Click image to enlarge. Rail not included
RLP304-24V-FT
Click image to enlarge.Product Documents
| Part # | Description | Data Sheet | Schematic | PDF Drawing | DWG Drawing | IGES Model | STEP Model |
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| RLP304-xxV-DIN | 4-Channel Small Signal Relay Board, DIN Mount | 
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| RLP304-xxV-FT | 4-Channel Small Signal Relay Board, Rubber Feet |
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4-Channel Small Signal Relay Board, DIN Mount
4-Channel Small Signal Relay Board, Rubber Feet
Product Details
- Four SPDT relays
- Relay coils directly connected to input-side screw terminals
- LED indicator for each relay
- Relay contacts rated for 2A at 30VDC, 1A at 125VAC
- Gold-clad contacts suitable for low-level signals down to 10uA
- Screw terminals for relay coils (accepts 16-26 AWG wire)
- Screw terminals for contacts (accepts 16-30 AWG wire)
- Rated for resistive loads (not inductive loads / motors)
- Approximate dimensions: 3.8" x 3.0"
- Available in rubber feet or DIN rail mount
Pricing and Ordering
| Product # | Description | 1+ | 10+ | 50+ | RoHS | Buy Now |
|---|---|---|---|---|---|---|
24V Coils: |
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| RLP304-24V-DIN | Relay Board, Passive, 2A SPDT, 4 relays, 24V DC, DIN Rail Mount | $38.95 | $36.70 | $35.05 | Yes | |
| RLP304-24V-FT | Relay Board, Passive, 2A SPDT, 4 relays, 24V DC, Feet | $37.30 | $35.05 | $33.40 | Yes | |
| Quantity | Price |
|---|---|
| 1+ | $38.95 |
| 10+ | $36.70 |
| 50+ | $35.05 |
| Quantity | Price |
|---|---|
| 1+ | $37.30 |
| 10+ | $35.05 |
| 50+ | $33.40 |
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.