Opto-Isolator Board: 4 Channels, Buffered Outputs
- Four channels of optical isolation with open-drain outputs
- Non-inverting output and inverting output for each channel
- LEDs provide visual indication for each signal and power
- Wide operating voltage range (3.3V to 24V)
- Suitable for signals from 3.3V logic up to 24V logic
- Buffered output stage for higher current sink capability
- Includes reverse-polarity protection on inputs and outputs
- Redundant power and ground terminal-block connections
- On the input side, the 4 channels are completely independent
- On the output side, the 4 channels share a common pull-up rail and GND
- Mounting Options: Rubber Feet, Panel, or DIN Rail
General Description
This product provides four channels of optical isolation with both a non-inverting output and an inverting output for each channel. Both the input side and the output side are designed to interface with equipment using logic voltages of anywhere from 3.3V to 24V. This robust design includes low-side output drivers that provide significant sink current capability. Reverse-polarity protection on inputs and outputs is also included.
Note that on the output side, the four channels share a commond pull-up rail (VPU) and a common ground reference (GND).
This board includes terminal blocks to provide convenient access to the signals.
Click image to enlarge.
An opto-isolator is sometimes referred to as a "photocoupler", "optical coupler", "optocoupler", "opto coupler", or "optical isolator".
Applications
- Electrical Isolation
- Interface between equipment with different grounds
- Interface between equipment with different logic levels
- Low-side driver for small DC loads (motors, solenoids, bulbs, etc)
OPI104-x Variants
The original OPI104 variant (OPI104-DIN, OPI104-FT) utilizes an output stage which includes current limit and thermal limit features, but whose output switching speeds are slower due to the protection circuitry. Due to present supply chain delays for the protected output stage components, we have introduced a new variant which uses a standard output stage, and whose switching speeds are much faster. The new part numbers are OPI104-HS-DIN and OPI104-HS-FT.
- OPI104: outputs feature protected N-FETs with built-in current limit and thermal limit
- OPI104-HS: outputs feature standard N-FETs with lower resistance and faster switching
Product Documents
| Part # | Description | Data Sheet | PDF Drawing | DWG Drawing | IGES Model | STEP Model | Document |
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| OPI104-DIN | 4-Channel opto-isolator, protected output stage, DIN Mount | 
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| OPI104-FT | 4-Channel opto-isolator, protected output stage, Rubber Feet |
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| OPI104-HS-DIN | 4-Channel opto-isolator, standard output stage, DIN Mount |
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| OPI104-HS-FT | 4-Channel opto-isolator, standard output stage, Rubber Feet |
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| OPI104 Selection Guide | Compares the OPI104 Variants |
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4-Channel opto-isolator, protected output stage, DIN Mount
4-Channel opto-isolator, protected output stage, Rubber Feet
4-Channel opto-isolator, standard output stage, DIN Mount
4-Channel opto-isolator, standard output stage, Rubber Feet
Compares the OPI104 Variants
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.
OPI104-DIN
Click image to enlarge. Rail not included
OPI104-FT
Click image to enlarge.Product Details
- Four channels of optical isolation with open-drain outputs
- Non-inverting output and inverting output for each channel
- LEDs provide visual indication for each signal and power
- Wide operating voltage range (3.3V to 24V)
- Suitable for signals from 3.3V logic up to 24V logic
- Buffered output stage for higher current sink capability
- Includes reverse-polarity protection on inputs and outputs
- Redundant power and ground terminal-block connections
- On the input side, the 4 channels are completely independent
- On the output side, the 4 channels share a common pull-up rail and GND
- Approximate dimensions: 3.5" x 3.5"
- Mounting Options: Rubber Feet, Panel, or DIN Rail
Pricing and Ordering
| Product # | Description | 1+ | 10+ | RoHS | Buy Now |
|---|---|---|---|---|---|
Protected Outputs: |
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| OPI104-DIN | Opto-isolator Board, Protected Outputs, 4 Channels, DIN Rail Mount | $58.95 | $55.65 | Yes | |
| OPI104-FT | Opto-isolator Board, Protected Outputs, 4 Channels, Feet | $57.30 | $54.00 | Yes | |
Low Resistance, High-Speed Outputs: |
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| OPI104-HS-DIN | Opto-isolator Board, High-Speed Outputs, 4 Channels, DIN Rail Mount | $58.95 | $55.65 | Yes | |
| OPI104-HS-FT | Opto-isolator Board, High-Speed Outputs, 4 Channels, Feet | $57.30 | $54.00 | Yes | |
| Quantity | Price |
|---|---|
| 1+ | $58.95 |
| 10+ | $55.65 |
| Quantity | Price |
|---|---|
| 1+ | $57.30 |
| 10+ | $54.00 |
| Quantity | Price |
|---|---|
| 1+ | $58.95 |
| 10+ | $55.65 |
| Quantity | Price |
|---|---|
| 1+ | $57.30 |
| 10+ | $54.00 |
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.