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IndraControl PR21 Embedded Automa-
tion Computer
RS-232 mode
●
RS-485 mode
●
RS-422 mode
●
12 Device description
The PR21 with Ubuntu Core does not support any UPS.
4
5
6
7
3
2
1
①
Functional earth
②
Power button
③
Reset button
④, ⑤
Ethernet interfaces
⑥
USB port (USB3.0)
⑦
HDMI port
Fig. 12-1: Device views
12.1 Reset and power buttons
Reset button SF1
Power button SF2
Tab. 12-1: Reset and power buttons
12.2 Operating and error display
LED
Vin
HD
S0 Working
S3 Standby
Tab. 12-2: LED description
8
9
10
1 1
On, off
On
S0: green, S3/S5: yel-
low
N/A
12
13
⑧
LED, hard disk access
⑨
LED power
⑩
Voltage supply
⑪, ⑫, ⑬ USB interfaces (USB2.0)
⑭, ⑮,
Serial interfaces
Hardware reset
Operating system shutdown
Off
No supply voltage con-
nected
no mSATA access or de-
vice shut down
S5 Soft-Off
R911389662_Edition 02 Bosch Rexroth AG
21/29
Device description
14
15
Flashes
N/A
mSATA access read/
write: flashing green
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