EK014 Opto-isolated I/O board 8-channel
Part no: 41016266
EK014 is an I/O board with four optically isolated inputs and outputs. The board can be used for control and communication with devices in electrically noisy environments or for conversion between different signal levels. The signal direction for each channel is referenced to the side of the board with the screw terminals. Arrows on the back of the PCB indicate the direction to simplify wiring. The four inputs are inverting, meaning that a low signal results in a high signal at the output. The four outputs are non-inverting. All inputs operate with voltages between 3.3V and 15V. For signal levels outside the specified range, the current-limiting resistors for the LEDs in the optocouplers must be replaced with values of lower or higher resistance to keep the LED current below 30mA.
- Load current: 50mA / 35V
- Signal voltage: 3.3 - 15V (5 - 30mA)
- Dimensions: 30.48 x 60.96mm
- Mounting holes: c-c 25.4 x 55.88mm, ø2.54mm
Component list
| RefDes | Value | Qty. | Part.no. | Marking |
|---|---|---|---|---|
| CON1 | Pin header 2.54mm 10-pin | 2 | 41001167 | |
| CON2 | Pluggable screw terminal 4-pin | 2 | 40210033 | |
| C1 | El.lyt 10uF | 1 | 40520003 | 10uF |
| C2, C3 | Ceramic 100nF | 2 | 41003038 | 104 |
| R1, R3, R5, R7, R9, R11, R13, R15 | Resistor 470ohm | 8 | 40811247 | |
| R2, R4, R6, R8, R10, R12, R14, R16 | Resistor 2kohm | 8 | 40307003 | |
| R17, R18 | Resistor 1kohm | 2 | 40811410 | |
| D1 | LED 3mm red | 1 | 40811310 | |
| D2 | LED 3mm green | 1 | 40811382 | |
| U1, U2, U3, U4, U5, U6, U7, U8 | Optocoupler EL817 | 8 | 40811522 | EL817 |
Assembly guide
Before starting assembly, check that the PCB is free from damage and scratches. Verify that all components to be assembled are present, compare with the component list.
It is usually easiest to start assembling the lowest profile components and work upwards in size. IC sockets, resistors, ceramic capacitors and diodes are mounted first. Electrolytic capacitors, connectors and potentiometers are mounted last.
For some components, correct orientation is important. Pay attention to the markings on the PCB.
Interactive assembly guide ↗
Simulation ↗
Schematic
Drawing
