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Daisy System Opto-isolated 4-channel Digital Input Board, 0-48V US$52.00

DAISY-18
Daisy System Opto-isolated 4-channel Digital Input Board, 0-48V


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 ACase BCase CCase DCase E
Input 1Sink modeSink modeSink modeSink modeSource mode
Input 2Sink modeSink modeSink modeSource modeSource mode
Input 3Sink modeSink modeSource modeSource modeSource mode
Input 4Sink modeSource modeSource modeSource modeSource 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


Optional Recommended Products for this Item
2x5 (10-pin) 0.05" pitch IDC Connector Flat Ribbon Cable, 20cm+ US$2.60

This product was added to our catalog on Tuesday 18 June, 2013.

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