Project planning guide
cyber
®
reaction wheel 2
en-16
Doc. no.: 5022-D060586
Revision: 02
2.2.5 Electrical interfaces
The following section describes the electrical interfaces as shown in figure 1.7 at the starter kit as
well as their properties.
Connector
Function
Plug connector type
crws
Plug connector type
remote end
A
USB port
Mini-USB B socket
Mini USB connector
B
Application interface
Pin connector, 20-pin,
male, grid 2.54 mm
Socket strip, 20-pin, female,
grid 2.54 mm
C
Programming
interface
Only for manufacturer
Only for manufacturer
D
Interface to reaction
wheel
MOLEX SlimStack PCB
connector (16+2)
5050701622
MOLEX SlimStack PCB
connector (16+2)
5050661622
E
Supply voltage
2-pin screw terminal
Open cable
Table 9: Overview of starter kit plug connectors
2.2.5.1 A: USB port
The USB port is used for easy startup,
-
for communication with the cyber
®
reaction wheel assistant, see section 3.3,
-
as well as for voltage supply (if necessary, derating the reaction wheel due to available
power of the USB voltage source)
-
and for diagnosis of the reaction wheel during integration, see section 3.5
The USB interface is based on a FT232R
USB-to-serial UART interface
from FTDI.
In the customer application, the pins UART Rx/Tx can be controlled directly, see section 2.2.7.4.
Connection
Property
Unit
Minimum
value
Nominal
value
Maximum
value
USB 2.0
Voltage supply and/or
communication
interface for startup
tool
V
5.0
Table 10: Electrical properties of application interface, connector B, at the cyber
®
reaction wheel starter kit
