# 2. Hardware
This page is about hardware specific details. For general information, refer to the 1. General page., for software related details please refer Cyphal interface or DroneCAN interface.
| View | Top | Bottom |
|---|---|---|
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# 2.1. Features
Main specifications:
- sensor: MS4525DO airspeed sensor
- input voltage: 2S-6S
- connectors: UCANPHY Micro (JST-GH 4), 6-pin Molex, SWD
- LxWxH: 26x32x14 mm
- Weight: 8 g
# 2.2. Wire
Schematic can be provided via e-mail request or issue on github.
Connectors
| № | Connector | Description |
|---|---|---|
| 1 | UCANPHY Micro (JST-GH 4) | Devices that deliver power to the bus are required to provide 4.9–5.5 V on the bus power line, 5.0 V nominal. Devices that are powered from the bus should expect 4.0–5.5 V on the bus power line. The current shall not exceed 1 A per connector. |
| 2 | 6-pin Molex (502585-0670 (opens new window), 502578-0600 (opens new window)) | Contacts support up to 100 V, 2 A per contact. But the board may work only with 2S-6S. |
| 3 | SWD | STM32 firmware updating using programmer-sniffer. |
Here (opens new window) you can find manufacturer part number of connectors it self and its mates.
Pin configuration and functions
| Pin | CAN-HV | Pin | CAN-LV | SWD |
|---|---|---|---|---|
| 1 | Vin | 1 | 5V in | GND |
| 2 | Vin | 2 | CAN High | SWCLK |
| 3 | CAN High | 3 | CAN Low | SWDIO |
| 4 | CAN Low | 4 | GND | 3.3V |
| 5 | GND | |||
| 6 | GND |
# 2.3. Specifications
Mechanical
Scheme is shown on the picture below.
| Width, mm | Length, mm | Height, mm | |
|---|---|---|---|
| Outline | 25.3 | 31.7 | 16.6 |
| PCB | 25.3 | 31.7 | 1.6 |
Total weight of device is 8 g.
You can download 3D model on GrabCAD (opens new window)
Housing
Information about case presented here.
Absolute Maximum Ratings
| Parameter | MIN | MAX | UNIT |
|---|---|---|---|
| Vin (CAN1) | 5.5 | 55* | V |
| V (CAN2, CAN3) | 4.5 | 5.5 | V |
| I max | A | ||
| Operating temperature |
*Noted Voltage should be delivered only with current limitation under 2.5 Amp.
Recommended operating conditions
| Parameter | Value | UNIT |
|---|---|---|
| Vin (CAN3) | 30 | V |
| V (CAN1, CAN2) | 5 | V |
| I max | A |
ESD ratings
| Description | Value | UNIT |
|---|---|---|
| Human-body model (HBM) | 2000 | V |
| Charged-device model (CDM) | 500 | V |
# 2.4. Description
Functional Block Diagram
Connection example diagram
# 2.5. Power Supply Recommendations
Device is designed to operate from an input voltage supply range between 4.5 V and 5.5 V over CAN2 or CAN3 connector, or 5.5 - 30 V from CAN1. This input supply must be able to withstand the maximum input current and maintain a stable voltage. The resistance of the input supply rail should be low enough that an input current transient does not cause a high enough drop that can cause a false UVLO fault triggering and system reset. The amount of bulk capacitance is not critical, but a 47-μF or 100-μF electrolytic capacitor is a typical choice.
# 2.6. Revision history
| View | Version | Date | Description |
|---|---|---|---|
| v2.3.2 (opens new window) | Oct 11, 2022 | Schematic changed to mount SMT vesion of MS4525DO |
| v2.0 (opens new window) | Jun 15, 2021 | New design | |
 | v1.3 (opens new window) | Sep 13, 2021 | 1 LED, 1 MOLEX Con, 1 JST Con, New mechanical design |
| v0.1 (opens new window) | Jan 21, 2021 | Legacy |