Functional Description
20NM50-00 E2
2016-05-17
Page 50
4.2
Status and Activity LEDs
The NM50 has a power status LED and a fault indicator LED at the front panel.
Table 5.
General status LEDs at front panel
4.3
USB Interfaces
The high end version of the NM50 (09NM50-01) provides two USB 2.0 host interfaces at
the front panel, via one standard USB series A and one standard series B connector.
4.3.1
USB Series A
Connector type:
4-pin USB Series A receptacle according to Universal Serial Bus Specification Revi-
sion 1.0
Mating connector:
4-pin USB Series A plug according to Universal Serial Bus Specification Revision 1.0
Table 6.
Pin assignment of USB series A front-panel connectors
Table 7.
Signal mnemonics of USB series A front-panel connectors
Please see
Chapter 1.2 External Interfaces on page 17
for the position of the LEDs.
Appearance
Color
Function
Yellow
Power Status LED
On: NM50 generated voltages are stable within
specified tolerances
Off: Internal generated voltages are out of valid
range
Red
Fault LED
On/flashing: device error has been detected
Off: normal operation, no error detected
Green
WLAN LED
On: no WLAN activity
Off/flashing: WLAN activity
Please see
Chapter 1.2 External Interfaces on page 17
for the position of the USB
ports.
1
+5V
2
USB_D-
3
USB_D+
4
GND
Signal
Direction
Function
+5V
out
+5 V power supply
GND
-
Digital ground
USB_D+, USB_D-
in/out
USB lines, differential pair
1
2
3
4
