kerlink ACCIOT-POW01 Wirnet iStation AN Solar Panels Instruction Manual
- June 15, 2024
- Kerlink
Table of Contents
- kerlink ACCIOT-POW01 Wirnet iStation AN Solar Panels Instruction Manual
- Introduction
- Wirnet™ iStation: USB-C input specifications
- Accessory specifications: DC/DC converter with USB-C output
- Wirnet™ iStation: Power consumption
- Wirnet™ iStation: Connection with DC/DC converter
- Add the rubber and the cover.
- Read More About This Manual & Download PDF:
- References
- Read User Manual Online (PDF format)
- Download This Manual (PDF format)
kerlink ACCIOT-POW01 Wirnet iStation AN Solar Panels Instruction Manual
Introduction
Wirnet™ iStation installation using solar panels require to fully control power efficiency of every part of the chain. Indeed, when a DC input POE injector is used to power the product, both the efficiency of the POE injector and the efficiency of the internal product converter need to be considered to calculate the global power efficiency. As the standard POE voltage is quite high (around 50 VDC), power efficiency is low, at around 80% for both stages which bring to a global power efficiency at about 60%.
Working on a solution based on the USB-C to reduce the voltage input will
improve the efficiency from 60% to more than 80%. Solar panels dimensions will
also be reduced by the same percentage.
This Application Note gives information on the engineering rules when the
customer wishes to connect a solar panel charge controller to USB-C of the
Wirnet iStation.
Wirnet™ iStation: USB-C input specifications
Specifications|
---|---
Absolute maximum input voltage rating| 5.5V
Operating input voltage range| 5.1V to 5.5V
**| Please strictly respect these recommendations to avoid any
malfunction or loss of performance that**
may not be covered by the manufacturer warranty / extended warranty.
---|---
Installation architectures
Accessory specifications: DC/DC converter with USB-C output
**** Kerlink provides the following accessory which is a voltage adapter to
be positioned between the solar panel charge controller and the USB-C of the
Wirnet iStation.
è The reference for this accessory is ACCIOT-POW01 (including DC/DC converter,
a notice and a packaging).
| Description | Specification |
|---|---|
| Input voltage range | 8-35 VDC |
| Nominal output voltage | 5.4V |
| Voltage regulation | <1% |
| Ripple (full load test) | <0.1V |
| Maximum output current | 2A |
| Efficiency | 80% |
| Cable length (USB-C side) | 1m |
| Cable section (USB-C side) | AWG20 min |
| Cable external diameter (USB-C side) | 6.6mm < Ø <8.6mm |
| Shielded (USB-C side) | yes |
| Cable UL rating (USB-C side) | UL 2725 |
| Cables UL flammability classification | UL 94 V-0 |
| Waterproof rating | IP67 |
| Temperature range | -25 to +65°C |
Wirnet™ iStation: Power consumption
The average power consumption on the USB-C Input under 5V is detailed below:
| Wirnet™ iStation | Power consumption |
|---|---|
| CPU block | 1.25W avg |
| Ethernet block | 0.150W avg |
| GPS block | 0.135W avg |
| WWAN block (25%Tx,75%Rx) | 1.45W avg |
| Radio block in Rx mode (x8 demodulator on) | 1.5W avg |
| TOTAL | 4.485W avg |
Figure 3: Power consumption
Also, the maximum input power under 5V is approximately 7W. This includes CPU,
ethernet enabled, GPS enabled, WWAN enabled and maximum RF power in Tx LoRa
mode.
So, as the efficiency of the DC/DC converter is around 80%, make sure that the
output power from the solar panel charge
controller is sufficient.
To correctly size the solar panel and battery, here are the values to
consider:
- 382W in average on DC/DC converter input
- 4W in max DC/DC converter input
Wirnet™ iStation: Connection with DC/DC converter
In the initial configuration (fig.4 on the left), the cable gland is screwed
into the M25 hole on the left and the transparent cap in the right.
In the configuration where the ACCIOT-POW01 accessory is connected, the
customer will have to swap the cable gland with the transparent cap as shown
in fig.4 on the right.
Be careful to keep the waterproof protection!!! Here are the specifications of
USB-C plug:
To use this cable gland, the first step is to screw the first part tightly to
the iStation so as not to twist the cable afterwards. Then, plug the cable
Therefore, it will be necessary to position the blue gasket of the cable gland
on the shrink tubing as shown on the following photo.
The USB-C plug can then be connected to the USB-C receptacle of iStation, as shown below.
Add the rubber and the cover.
Finally, screw the cover on tightly to ensure a good seal.
__
__
| Special attention on length and section must be taken into consideration
regarding the cable used between the converter and the Wirnet TM iStation
USB-C input since acceptable drop voltage inside the cable is low. Please
strictly respect these recommendations to avoid any malfunction or loss of
performance that may not be covered by the manufacturer warranty / extended
warranty.
---|---
Any other question related to our product, please contact our distributors or
Kerlink: support@kerlin k.fr / + 33 2 99 12 29
00.
We stay at your disposal for any help on your project. Yours sincerely.
Kerlink