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Hardware Specifications
Alexander Maitland-Lauderdale edited this page May 20, 2026
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| Pin | Description |
|---|---|
| Length (mm) | 88 |
| Width (mm) | 121 |
| Height (mm) |
| Parameter | Rating | Units |
|---|---|---|
| Input Voltage | 24 | VAC |
| Maximum Current Draw (excluding solenoids) | 100 | mA |
| Idle Current Draw | 5 | mA |
| Solenoid Drive Voltage | 24 | VAC |
| Maximum Solenoid Hold Current Per Channel | 300 | mA |
| Status LED Output Voltage | 5 | V |
| Status LED Maximum Current | 30 | mA |
| Wi-Fi LED Output Voltage | 5 | V |
| Wi-Fi LED Maximum Current | 30 | mA |
The barrier terminal block is located at the bottom of the PCB, this is where power and solenoid connections are to be made. The silkscreen is clearly marked for pin functions. Power is connected to pin 1 and 2 of the terminal block, labelled L and N. A fuse must be installed into the fuse holder to the left of the terminal block. Pin 3 is the common pin for your retic solenoids, pins 4 through to 12 are for channels 1 to 8 respectively. With the barrier terminal facing you, and at the bottom of the PCB:
| Pin | Description |
|---|---|
| 1 | 24AC power live |
| 2 | 24AC power neutral |
| 3 | Solenoid and Pump common |
| 4 | Pump or main solenoid control |
| 5 | Zone 1 |
| 6 | Zone 2 |
| 7 | Zone 3 |
| 8 | Zone 4 |
| 9 | Zone 5 |
| 10 | Zone 6 |
| 11 | Zone 7 |
| 12 | Zone 8 |
The LED terminal block is located on the top of the PCB to the left of the ESP32. This is where you can optionally wire up the status LED and the Wifi LED. There is a 1.2kΩ resistor built onto the PCB for each LED to limit the current.
| Pin | Description |
|---|---|
| 1 | Wifi LED anode (+5VDC) |
| 2 | Wifi LED cathode (GND) |
| 3 | StatusLED anode (+5VDC) |
| 4 | Status LED cathode (GND) |