Reader - SmartRelay 3 system
Reader connection | SREL3 controller connection | Signal |
|---|---|---|
A | A1/A2/A3 | RS-485: Data line A |
B | B1/B2/B3 | RS-485: Data line B |
- | - | GND. Used to establish the common ground reference potential for the data lines. Any ground connection to the SREL3 controller. |
+ | + | VIN. Connection for power supply (external or via controller). |
- | - (optional) | GND. Connection for external power supply. Electrically connected to reader port 3. Only required with external power supply. |
WP version
The weatherproof WP version of the reader is supplied with a 2 m long, pre-assembled cable.
Reader connection | Wire colour in cable | SREL3 controller connection | Signal |
|---|---|---|---|
A | yellow | A1/A2/A3 | RS-485: Data line A |
B | brown | B1/B2/B3 | RS-485: Data line B |
- | green | - | GND. Used to establish the common ground reference potential for the data lines. Any ground connection to the SREL3 controller. |
black (brought out only on the reader's end) | - | GND. Connection of the cable shielding to the common ground reference potential of reader and controller. | |
+ | white | + | VIN. Connection for power supply (external or via controller). |
- | - (optional) | GND. Connection for external power supply. Electrically connected to reader port 3. Only required with external power supply. |