X20 system modules • Bus receivers and Bus transmitters • X20BT9100
X20 system User's Manual 3.10
609
4.8.3.4 LED status indicators
Figure
LED
Color
Status
Description
Off
No power to module
Single flash
RESET mode
Blinking
PREOPERATIONAL mode
r
Green
On
RUN mode
Off
No power to module or everything OK
e
Red
Double flash
LED indicates one of the following states:
•
I/O supply too low
•
X2X bus supply too low
e + r
Red on / Green single flash
Invalid firmware
Off
No communication at the X2X Link
X
Orange
On
X2X Link communication in progress
Table 203: LED status indicators
4.8.3.5 Pinout
X
20
B
T
91
00
X2X
X2X\
X2X⊥
X
r
e
+24 V I/O
GND
4.8.3.6 Connection examples
No feed for internal I/O supply
GND
+24 VDC
BT
X2X
X2X\
X2X⊥
Figure 239: Connection example - No feed for internal I/O supply
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