CR1102
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5.9 USB interfaces
This USB interface is connected to a USB connector in the control panel or in the dashboard. It is
used for the connection of USB 2.0 devices.
The supply of external USB devices via the USB interface is protected against overload and
overvoltage. Max. continuous current: 500 mA
≤ 1,8 m
Fig. 11: USB connection via M12 connector
1:
dialogue module
2:
USB connector, for example, in the control panel or in the dashboard
3:
USB device
A: Permanent connection: dialogue module – USB connector
u
Use a prewired cable.
(M12 connector, B-coded on USB socket, type A, watertight, cable length 1.5 m, wires twisted and
screened)
u
If self-assembling cables, please only use cables according to USB 2.0 specification.
Keep length "B" as short as possible and position the USB connector in the immediate vicinity of
the dialogue module. The length "B" considerably influences the quality of the USB data
transmission.
B: Connection: USB connector – USB device
u
Use a connection cable with the designation "Full Speed/High Speed" (= USB connection cable
with twisted and screened cores according to USB 2.0 specification).
u
Do not use more than one USB cable for the connection.
5.9.1 Short-circuit protection
ATTENTION
The USB interface (M12 connector) is not protected against short circuits with a live wire
outside the following voltage ranges:
+5 V DC -0.3...6.0 V DC (pin 1)
–Data -0.3...3.6 V DC (pin 2)
+Data -0.3...3.6 V DC (pin 3)
ID -0.3...3.6 V DC (pin 4)
w
A short circuit will destroy the USB interface.
5.10 Selection of loudspeakers
For optimum audio output, use 8 Ω loudspeakers .
