Hardware Installation¶

Pinout¶

The 68 pin main connector has the distribution of input/output channels as follows:

../_images/connector-HEW.LM.368.XLNP_v3.png — **Connector HEW.LM.368.XLNP (mounted in CEX)**¶

Warning

Check the pin number before connecting. The color code is repeated 3 times due to the amount of pins. First section corresponds to pins 1-30, the second section to pins 31-60 and the third one to pins 61-68. Pin number increases following the black line of the pictures above: counterclockwise for the connector and clockwise for the plug.

PIN	Signal	Color code	Description
1	Power supply 1	White	Power supply for the main system, redundant with Power supply 2
2	Power supply 2	Brown	Power supply for the main system, redundant with Power supply 1
3	GND	Green	Ground for supply
4	GND	Yellow	Ground for supply
5	CAN (A) P	Gray	CAN bus interface. It supports data rates up to 1 Mbps Twisted pair with a 120 \(\Omega\) Zo recommended
6	CAN (A) N	Pink
7	CAN GND	Blue	Ground for CAN busses
8	CAN (B) P	Red	CAN bus interface. It supports data rates up to 1 Mbps Twisted pair with a 120 \(\Omega\) Zo recommended
9	CAN (B) N	Black
10	OUT RS-485 (P)	Violet	Non-inverted output from RS-485 bus
11	OUT RS-485 (N)	Gray - Pink	Inverted output from RS-485 bus
12	IN RS-485 (N)	Red - Blue	Inverted input to RS-485 bus
13	IN RS-485 (P)	White - Green	Non-inverted input to RS-485 bus
14	RS-485 GND	Brown - Green	Ground for RS-485
15	RS-232 (A) TX	White - Yellow	RS-232 A Output
16	RS-232 (A) RX	Yellow - Brown	RS-232 A Input
17	GND	White - Gray	Ground for digital busses
18	RS-232 (B) TX	Gray - Brown	RS-232 B Output
19	RS-232 (B) RX	White - Pink	RS-232 B Input
20	I2C SCL	Pink - Brown	Clock line for I2C bus
21	I2C SDA	White - Blue	Data line for I2C bus
22	3.3V Output	Brown - Blue	3.3V-100 mA power supply
23	GND	White - Red	Ground for power supply
24	5V Output	Brown - Red	5V - 100 mA power supply
25	GND	White - Black	Ground for power supply
26	ATX (0) N	Brown - Black	ARINC 429 inverted output Port 0
27	ATX (0) P	Gray - Green	ARINC 429 non-inverted output Port 0
28	ARX (0) P	Yellow - Green	ARINC 429 non-inverted input Port 0
29	ARX (0) N	Pink - Green	ARINC 429 inverted input Port 0
30	ECAP 0	Yellow - Pink	Encoder quadrature input
31	ECAP 1	White	Encoder quadrature input
32	ECAP 2	Brown	Encoder quadrature input
33	ECAP 3	Green	Encoder quadrature input
34	PWM 0	Yellow	PWM/DIGITAL output /DIGITAL input signal (0-5V) Warning Each pin withstands a maximum current of 8 mA
35	PWM 1	Gray
36	PWM 2	Pink
37	PWM 3	Blue
38	PWM 4	Red
39	PWM 5	Black
40	PWM 6	Violet
41	PWM 7	Gray - Pink
42	GND	Red - Blue	Ground for digital/analog signals
43	ANALOG (0) 3.3V	White - Green	Analog input 0-3.3 V
44	ANALOG (1) 3.3V	Brown - Green	Analog input 0-3.3 V
45	ANALOG (2) 5V	White - Yellow	Analog input 0-5 V
46	ANALOG (3) 5V	Yellow - Brown	Analog input 0-5 V
47	ANALOG (4) 12V	White - Gray	Analog input 0-12 V
48	ANALOG (5) 12V	Gray - Brown	Analog input 0-12 V
49	ANALOG (6) 36V	White - Pink	Analog input 0-36 V
50	ANALOG (7) 36V	Pink - Brown	Analog input 0-36 V
51	GND	White - Blue	Ground for digital/analog signals
52	ARX (1) P	Brown - Blue	ARINC 429 non-inverted input Port 1
53	ARX (1) N	White - Red	ARINC 429 inverted input Port 1
54	ARX (2) P	Brown - Red	ARINC 429 non-inverted input Port 2
55	ARX (2) N	White - Black	ARINC 429 inverted input Port 2
56	ARX (3) P	Brown - Black	ARINC 429 non-inverted input Port 3
57	ARX (3) N	Gray - Green	ARINC 429 inverted input Port 3
58	ARX (4) P	Yellow - Green	ARINC 429 non-inverted input Port 4
59	ARX (4) N	Pink - Green	ARINC 429 inverted input Port 4
60	GPIO 8	Yellow - Pink	DIGITAL output /DIGITAL input signal (0-3.3V) Warning Each pin withstands a maximum current of 1.65 mA
61	GPIO 9	White
62	GPIO 10	Brown
63	GPIO 11	Green
64	GPIO 12	Yellow
65	GPIO 13	Gray
66	GPIO 14	Pink
67	GPIO 15	Blue
68	GPIO 16	Red

Harness¶

A wire harness is a structured assembly of cables and connectors used to organize and manage wiring in electrical and electronic systems. It is designed to ensure a tidy and secure installation of cables, preventing tangles, electromagnetic interference, and facilitating maintenance.

The connection between the CEX and its harness is done through the following connectors:

Main Connector	HEW.LM.368.XLNP
Harness plug connector	FGH.LM.368.XLCT

CEX 2.0 has two compatible harnesses:

Veronte Harness Green 68P	Veronte Avionics: Dev Harness CEX 2.0

Harness available on demand with the Embention reference P001623	Harness available on demand with the Embention reference P006140

Dimensions¶

Harness plug dimensions:

Connector FGW.LM.368.XLCT dimensions (cm)¶
Harness Green 68P wire gauge: 22 AWG
Cables lenght: 52 cm

CAN Assembly¶

As described in Warnings section, CEX itself does not allow the connection of multiple CEX or other CAN Bus devices to the same line. It is therefore possible to use a Veronte Autopilot for this purpose. Considering Veronte Autopilot includes one entrance resistance of 120 \(\Omega\), a second resistance needs to be placed at the end of the line (again 120 \(\Omega\)). This resistance may be placed on the cable or on another PCB.