Internal Board Block Diagram - Toshiba Carrier BMS-IFBN1281U-UL Service Manual

BN interface

2-3. Internal board block diagram

CPU BOARD
12V DCIN
TU2C-LINK communication board
CPU BOARD
CN2
12 -EN
Ethernet (LAN)
RTC_BAT
SW1
CR2032 battery
SD
LINK (Uh)
Phoenix Contact GMSTB 2.5/2-ST
1 3 5 7 9
    
B    
2 4 6 8 10
A Black Shutdown button
B Red Shutdown button
C Blue CPU board cable
D White
CPU board cable
E Black
CPU board cable
CN2 CN1 (not used)
CN08
MCU
CPU BOARD
CN21
12V DCOUT
11 13 15 17 19
 A 
C D
   
E
12 14 16 18 20
Shutdown button
12V DCIN
SW1
1 2
Service Manual
ON
OFF