1.2    Names  and  Functions  of  the  Parts 
Unified Controller nv series PROFIBUS(PA912) Module Instruction Manual 
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  1.2  Names and Functions of the Parts   
1.2.1  Names of the parts 
Figure 1-6 shows the names of the parts of the PA912 module and I/O base unit 
BU90A. 
 
 
 
Figure 1-6    Names of the parts of the PA912 module and I/O base unit 
BU90A 
net I/O loop state display LED
TC-net I/O loop connector 
 
Serial communication port
・TOOL
PROFIBUS transmission connector
PROFIBUS configurator 
tool port 
・  RUN
・  ERR
・  LP
・  SCAN 
・  ACT1
・  ACT2
・  LNK1
・  LNK2 
・PROFIBUS-DP 
・CONFIG 
PROFIBU State display LED 
 
・CFG
・MODE
・COM
・TOK
・LP1 ・LP2
TC-net I/O 
Loop address 
setting switch 
・MAINT
・STN-H  ・STN-L 
Operation mode 
setting switch 
・MODE 
Maintenance switch 
MODE 
STN-H 
STN-L 
MAINT 
↓RUN 
PA912
LP1 
LP2 
TOOL
CONFIG
PROFIBUS-DP 
24V
0V
FG
1  2  3 
Power terminal
BU90A  PA912