Hardware Installation

Danger

The system slowly discharges the voltage on the input terminals when the battery is disconnected. Capacitors may remain charged unless enough time has elapsed.

Note

When working voltage is higher than 60 V, use of insulating gloves are mandatory for installation and the system must have a chassis fault detection system.

Mechanical Assembly

To fix the MC110 to an aircraft frame, take a look to the dimensions and screws positions. Screw holes must be deeper than 6 mm with M6.

Vibration Isolation

There might be situations where external isolation components might be needed.

Veronte MC110 can be mounted in different ways in order to reject the airframe vibration. The simplest way CAN be achieved by just using double-sided tape on the bottom side of MC110. Other ways may use some external structure which could be rigidly attached to the airframe and softly attached to Veronte (e.g. foam, silent blocks, aerogel, etc).

The user should take into account that wiring should be loose enough so vibrations may not be transmitted to MC110.

In cases where mechanical isolation is not viable, it is possible to use soft engine mounts. It is also recommended when there are other sensible payloads like video cameras or for high vibration engines.

ESC-Motor Wiring

Warning

The polarity connection of the input must be respected, otherwise a short circuit may occur.

The polarity and connections are indicated in the following image and table.

Nº	Name	Description
1	HV negative	Input power from DC current 100 to 800 V DC
2	HV positive
3	Phase U	Output power to motor
4	Phase V
5	Phase W
6	Sensor connector	Encoders and sensor temperature signals
7	User connector	Communications, telemetry and control signals

The section of the cables must be dimensioned according to the maximum power that will be used

Battery cables between MC and battery should be as short as possible. If the distance between battery and motor is long, please extend phase cables in order to shorten battery cables.

Tip

Connection of the phases can be done freely, however, it will affect the direction of rotation of the motor.

Hence, if the motor is spinning in the opposite direction, switch any 2 phases around.

User Connector Wiring

To access and wire the user connector, follow the next steps:

1. Unscrew the enclosure.

2. Pull up the enclosure and plug the user connector.

3. Pass the wires between the capacitors. Heat shrinkable cover is recommended to protect wires and keep them together.

   Tip

   The capacitors have two cable tie mounts, so wires can be fixed with cable ties.

   

   Cable tie mounts on capacitors

4. Screw back the enclosure, such that wires protrudes from MC110.

Pinouts

User Connector

The user connector pinout is shown in the following figure and table:

Pin numbers of user connector

User connector
Nº	Name	Description	Nº	Name	Description
1	SYNC_ID_IN	Input Signal for Sync Identification *	2	SYNC_ID_OUT	Output Signal for Sync Identification *
3	GND	Ground	4	GND	Ground
5	SYNC_OUT *	Output PWM to synchronize multiple MC110 units	6	SYNC_IN *	Input PWM to synchronize multiple MC110 units
7	GND	Ground	8	RS232_TX	RS-232 transmitter
9	OUT_485_P	RS-485 output positive	10	RS232_RX	RS-232 receiver
11	OUT_485_N	RS-485 output negative	12	FAN_PWM	Digital PWM output for fan control
13	IN_485_N	RS-485 input negative	14	HEARTBEAT	Error diagnosis signal
15	IN_485_P	RS-485 input positive	16	GND_485	Ground for RS-485
17	OPTO_PWM	Digital Input for motor speed. Optocupled inside MC110	18	OPTO_RTN	Return of pin 17
19	CANFD_N	CAN FD negative pin	20	CANFD_P	CAN FD positive pin
21			22
23	GND_CAN **	Isolated ground for CAN	24	GND_CAN **	Isolated ground for CAN
25	CANB_N	CAN B negative pin	26	CANB_P	CAN B positive pin
27			28
29	GND	Ground	30	VCC	Digital power supply 8 - 36 V

* :Synchronization between MC110s optimizes battery management.

** :Ground for CAN is not necessary, but it can be used in case of having issues with CAN signals.

Sensor Connector

The sensors connector pinout is shown in the following figure and table:

Pin numbers of sensor connector

Sensor connector
Nº	Name	Description	Nº	Name	Description
1	ENC_SIN	Sine input from encoder	2	ENC_COS	Cosine input from encoder
3	GND_ISO	Isolated ground	4	5_V_HALL	Isolated 5 V
5	ENC_A *	Encoder A	6
7	ENC_B *	Encoder B	8	ENC_Z *	Encoder Z
9	GND_ISO	Isolated ground	10	ISO_TEMP	External temperature sensor measurement
11			12	1_V	Power supply for external temperature sensor (1 V)

* These inputs are digital, incremental and optocupled inside MC110.

If the temperature sensor is connected as a pull-up resistor, pin 1_V (12) will be the voltage reference. If the temperature sensor is connected as a pull-down resistor, pin GND_ISO (3, 9 or 11) will be the voltage reference.

How to Turn On and Off

MC110 has two electric circuits: control and power. To turn on the voltage supply (with devices such as switches, relays or MOSFETs), it is mandatory to do it with the following order: first of all the control group, and then the power group.

The control group is in the user cable. The power circuit is in the negative and positive cables. Then the enabling order is summarized in the following figure:

Turn on order

To turn off the MC110, the disabling order is reversed: first power circuit (input negative and positive), then the control circuit (user cable).

Electrical Diagram of CAN Bus

Like any other CAN device, Veronte MC110 requires a termination resistor to allow the connection of multiple MC110s or other CAN bus devices to the same line.

Typical CAN diagram

Considering Veronte Autopilot includes one entrance resistor of 120 \(\Omega\), a second resistor needs to be placed at the end of the line (120 \(\Omega\)). This resistor may be placed on the cable or on another PCB.

CAN diagram with Veronte Autopilot

MC110 has an internal resistor of 120 \(\Omega\), which can be activated by software. Then, another way to connect multiple CAN bus devices lies in connecting a MC110 to the end of line, then activating its internal CAN resistor. To enable or disable the resistor, refer to the Mailboxes - Input/Output section of MC110 PDI Builder user manual.

Diagram with CAN resistor activated