Konnect Optical I/O Expansion Board
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What is Konnect?
Konnect expands the I/O for KFLOP by adding 16 optically isolated outputs and 32 optically isolated inputs for high-voltage I/O applications and for situations where there is a potential for spikes in voltage that need to be isolated from KFLOP. This makes expansion of KFLOP to high-quantity industry-standard 24V optically isolated I/O easy and low cost. Add as many as 4 Konnects for up to 192 channels of I/O.
Outputs are all fully isolated for sinking or sourcing current independently per output channel. Maximum output current of 0.25A permits driving of up to 6W relays, solenoids, or other loads directly. Inputs are grouped into 4 independent banks to allow each bank to be driven from a different source, voltage, or polarity. Each input bank has a separate common that can be used as common anode or common cathode. No configuration or jumpers are required as each input can accept either a positive or negative voltage. LEDs on all 32 inputs and 16 outputs make troubleshooting problems easy. 72 pluggable 5mm pitch screw terminals are included. Simple 16-pin ribbon connection to KFLOP provides all required signals and power. High speed deterministic update rate of 180us per board.
The input consists of an AC type of optocoupler in series with an LED indicator and a 4Kohm resistor. The AC type of input allows the common to be connected to either the positive or negative supply voltage so that sinking or sourcing outputs can be used. Each of the 16 outputs is completely isolated with a + and - terminal. When active the output passes current from the + to - terminals much like a relay contact would.
Highlights
- (32) Opto Isolated Inputs 4 .75V - 25V
- (16) Opto Isolated Outputs 25V @ 0.25Amps
- (48) LED Indicators on all I/O
- (72) Screw Terminals - 5mm - Pluggable
- Expandable to 4 Boards for 192 I/O
- Inputs and Outputs Support Sourcing or Sinking
- Outputs Guaranteed Off on Power Up
- High and Deterministic Update Rate
Konnect Block Diagram
Hardware Specifications
| Parameter | Specification |
|---|---|
| Inputs | |
| Number | 32 Inputs |
| Type | Full Opto Isolation |
| VIH | 4.75V min On Voltage, 25V max allowed Voltage |
| VIL | 2V Max Off Voltage |
| Input Resistance | 4K Ohms |
| Banks | 4 Banks of 8 Inputs per bank |
| Bank Commons | Common Anode or Cathode (Inputs activate with + or - voltage relative to Common) |
| Outputs | |
| Number | 16 Outputs |
| Type | Full Opto Isolation |
| Configuration | Darlington Transistor |
| Max Voltage | 30V |
| Max Current | 0.25A |
| On Voltage Drop | 0.6V max @ 2ma 0.9V max @ 0.25A |
| Connectors | |
| JP8 Aux Bus to KFLOP | 16 pin Header (IDC 0.1 inch pitch) |
| Input Commons | 4 pin Pluggable Screw Terminal 5mm pitch |
| J2 Power | 4 pin Pluggable Screw Terminal 5mm pitch |
| IN0, IN1, IN2, IN3 |
8 pin Pluggable Screw Terminal 5mm pitch |
| OUT0, OUT1, OUT2 OUT3 | 8 pin Pluggable Screw Terminal 5mm pitch |
| Logic Supplies | |
| Voltage VDD5 | +5V ±10% |
| Max Current | 0.4A |
| Voltage VDD33 | +3.3 ±10% |
| Max Current | 0.2A |
| Voltage VDD12 Max Current |
(not used internally) |
| Environment | |
| Operating Temperature | 0-40º C |
| Storage Temperature | 0-40º C |
| Humidity | 20-90% Relative Humidity, non-condensing |
| Lead | Lead Free RoHS |
| Dimensions | |
| Length | 8.0 inches (203mm) |
| Width | 3.5 inches (89mm) |
| Height | 0.75 inches (19mm) |