Project planning guide
cyber
®
reaction wheel 2
en-18
Doc. no.: 5022-D060586
Revision: 02
2.2.5.3 D: Interface to reaction wheel
Figure
Pin no.
Signal name
Function
17
GND
Ground reference
18
GND
Ground reference
1
Chopper_Ena
Activation of
underclocking
2
I2C_SCL
I²C Bus SCL
3
IO_1
User Ouput 1:
red LED on starter kit
4
I2C_SDA
I²C Bus SDA
5
Reserved
Reserved for CAN Rx
6
SPI_MOSI
SPI Bus MOSI
7
Reserved
Reserved for CAN Tx
8
SPI_MISO
SPI Bus MISO
9
UART_Tx
Serial interface
10
SPI_nCS
SPI Bus Chip-Select
11
UART_Rx
Serial interface
12
SPI_CLK
SPI Bus Clock
13
Reserved
Reserved for USB D-
14
Reserved
Reserved for USB D+
15
IO_2
User Ouput 2:
green LED on starter kit
16
IO_3
User Input 1
19
VDD
Reaction wheel supply
20
VDD
Reaction wheel supply
Connector type at starter kit: MOLEX SlimStack PCB connector (16+2)
5050701622
Table 13: Pin assignment of interface to reaction wheel, connector D, at the cyber
®
reaction wheel starter kit
•
Observe the maximum number of 30 plug-in cycles for the interface to the reaction wheel.
Connection
Property
Unit
Minimum
value
Nominal
value
Maximum value
Signals 1-16
Voltage
[V]
3.0
3.3
3.6
VDD
Voltage
[V]
3.0
8.8
Table 14: Electrical properties of application interface, connector D, at the cyber
®
reaction wheel starter kit
2.2.5.4 E: Supply voltage
Besides voltage supply via USB port (A), see section 2.2.5.1, a power supply unit can also be
used directly. This is recommended if the reaction wheel is operated very dynamically, as the
power supplied from the USB port is not sufficient for stable supply of the reaction wheel at every
operating point.
Figure
Pin no.
Signal
Function
1
VDD
Supply
2
GND
Ground reference
Connector type at starter kit: 2-pin screw terminal
Table 15: Pin assignment of supply voltage, connector E, at the cyber
®
reaction wheel starter kit
Connection
Property
Unit
Minimum
value
Nominal
value
Maximum
value
VDD
Voltage
[V]
3.0
5.0
8.8
Table 16: Electrical properties of supply voltage, connector E, at the cyber® reaction wheel starter kit
