DAISY-18 is an opto-isolated 0-48V, 4-channel digital input board for industrial purposes. It is part of the modular Daisy System that can be controlled by the FOX Board G20 via the DAISY-1 Adapter, or by the Terra Board.
You can chain two DAISY-18 modules together, thus you can have up to eight input channels on a single Daisy port (provided all pins are set as GPIO).
The Daisy ports that can be used are:
- D2 or D5 on the DAISY-1 adapter (Fox)
- D11 or D12 on the Terra Board
Be sure to get a 0.05" pitch 2x5 IDC cable (FC-19818-10P-FF) to make the connection. The cable is not included. You'll need one for each DAISY-18 module.
Daisy System Digital Input Module Features
- Four input channels
- Max. input volage: 48V
- Max. input current: 15mA @ 24V, or 18mA @ 48V
- Schmitt trigger low-level input threshold: 10.5V
- Schmitt trigger high-level input threshold: 16V
- Input voltage: 2500Vrms max.
Daisy System Digital Input Module Modes The "floating" opto-isolated inputs of the DAISY-18 module handle the following configurations:
Mixed modes are handled easily as shown in the following table:
| ||Case A||Case B||Case C||Case D||Case E |
|Input 1||Sink mode||Sink mode||Sink mode||Sink mode||Source mode |
|Input 2||Sink mode||Sink mode||Sink mode||Source mode||Source mode |
|Input 3||Sink mode||Sink mode||Source mode||Source mode||Source mode |
|Input 4||Sink mode||Source mode||Source mode||Source mode||Source mode |
DAISY-18 Python Code Examples The following examples assume the DAISY-18 module is connected to the Terra Board's D11 port. You can modify the code easily to run it from a different port, e.g. Fox Board port D2.
These examples call the ablib Library, so download that too if you haven't already.
- read4.py reads the input states from a single DAISY-18
- read8.py reads the input states of two DAISY-18 modules chained from the same Daisy port
Daisy System Digital Input Module Resources
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