Hardware Installation¶
Mechanical Installation¶
To fix the Smart CAN Isolator to the airframe, clamps are provided and may be used depending on final position. M3 screws are recommended for mounting when clamps are used.
Smart CAN Isolator Clamps Dimensions¶
Electrical Installation¶
Power Supply¶
Smart CAN Isolator requires power supply on both connectors from 6 to 28V. Both connectors must receive power supply simultaneously; however, they have 30 seconds as grace period to connect the second one. If this period is not accomplished, Smart CAN Isolator will require to reboot before to try again.
CAN circuit¶
Smart CAN Isolator does not integrate a termination resistance in order to allow for multiple devices to be connected to the same line. Considering Veronte Autopilot includes one entrance resistance of 120 Ω, a second resistance needs to be placed at the end of the line (again 120 Ω). This resistance may be placed on the cable or on another PCB.
Smart CAN Isolator Assembly Diagram Example¶
Pinout¶
OEM version does not have explicit indicators to distinguish connectors A and B. However, the JTAG connector can be used as a reference according to the following image:
Connectors location of OEM version¶
Pin distribution for both connectors is as follows.
A side connector - T4144015081-000 |
||
|---|---|---|
PIN Nº |
I/O |
Comments |
1 |
VIN_A - |
Negative reference for power supply A |
2 |
CAN A (N) |
CANbus interface. It supports data rates up to 1 Mbps Twisted pair with a 120 Ω Zo recommended |
3 |
CAN A (P) |
|
4 |
GPIO Output A |
DIGITAL output signal (0-3.3V) |
5 |
GPIO Input A |
DIGITAL input signal (0-3.3V). Has pull-up resistor. |
6 |
GND A |
Ground reference for domain A CAN and GPIOs |
7 |
VIN_A + |
Positive reference for power supply A |
8 |
N.C. |
No connect |
B side connector - T4144015081-000 |
||
|---|---|---|
PIN Nº |
I/O |
Comments |
1 |
VIN_B - |
Negative reference for power supply B |
2 |
CAN B (N) |
CANbus interface. It supports data rates up to 1 Mbps Twisted pair with a 120 Ω Zo recommended |
3 |
CAN B (P) |
|
4 |
GPIO Output B |
DIGITAL output signal (0-3.3V). |
5 |
GPIO Input B |
DIGITAL input signal (0-3.3V). Has pull-up resistor. |
6 |
GND B |
Ground reference for domain B CAN and GPIOs |
7 |
VIN_B + |
Positive reference for power supply B |
8 |
N.C. |
No connect |
As mating connectors for both inputs, there are several recommended options:
21033192801: Straight option, with screw termination
1522875: Straight option, 24 AWG 3 meters cables already assembled
21033194801: Right angle option, with screw termination
1522639: Right angle option, 24 AWG 3 meters cables already assembled