The Digital Matter iButton Reader has the following wire colours:
| Wire Color | Function |
|---|---|
| Red | iButton Signal Line |
| Black | Ground |
| Green | Green LED (with 1000 ohm resistor) |
| Brown | Red LED (with 1000 ohm resistor) |
| Yellow | LED Negative |
Dart 3 Wiring Guide - DART3 12-wire Harness Definition.
Connecting an iButton Reader to the Dart3 Harness
Cut the 4 way Molex plug off the Harness. (Ensure you won't be using it with a DM RFID reader first)
- Connect Brown (Driver ID 1 - Pin 10) to the Red iButton Signal Line
- Connect a Black wire (Dart3 Ground) to the Black Ground on the iButton reader
Parameters
The Dart3 must be told to expect an iButton input in parameters, by default it is expecting DM RFID reader input over these wires.
LED Flash Output
The System Rail Output wire (Purple) can be used to flash an LED. If you wish to use the LED in the iButton harness, connect the following:
| Dart Harness | IButton Wire |
|---|---|
| Purple (System Rail out) | LED Positive Wire
|
| Black (TTL Ground) | LED Negative (Yellow) |
LED Blinks on No Driver ID
| iButton Wire | Dart Harness |
|---|---|
| Brown Or Green | Purple (System rail out) |
| Yellow | Black |
| Black | Black |
| Red | Brown |
Special System parameters required:
 |  |
LED turns on with Ignition
| iButton Wire | Dart Harness |
|---|---|
| Brown Or Green (If you want the LED to change colour on ignition, connect one LED to External Power) | White-Ignition |
| Yellow | Black |
| Black | Black |
| Red | Brown |
LED Turns off with Tag Scan
(Pdf attached for wiring diagram)
| iButton Wire | Dart Harness Wire | Relay Wire |
| Red | Brown & Green | - |
| Brown and/or Green | Red | Purple |
| Yellow & Black | Yellow | White |
Special System parameters required:
 |  |