GE Brivo OEC 715, Service Manual, Page: 81 / 551

System Overview
2-27
UDB_OVERCUR_N Over current error Digital 0-+15v J1-C9 0V= effective
DOWN_PROTECT_TO_MCB_N Reach limit Digital 0-+15v J1-C10 0V= effective
UP_TO_MCB_N UP key Digital 0-+15v J1-C8 0V= effective
DOWN_TO_MCB_N DOWN key Digital 0-+15v J1-C20 0V= effective
DOWN_SECURITY_TO_MCB_N DOWN_SECURITY key Digital 0-+15v J1-C21 0V= effective
Workstation Communication
Signals from MCB to WK (Workstation) are listed as follows.
Name Description Attribution Scale Pin Comment
WK_Y One of two differential signals from MCB to WK Differential
signal
+/-(1.5-
5V)
J2-B2 -
WK_Z The other one of two differential signals from
MCB to WK
J2-A2 -
Signals from WK to MCB are listed as follows.
Name Description Attribution Scale Pin Comment
WK_A One of two differential signals from WK to MCB Differential
signal
+/-(1.5-
5V)
J2-A3 -
WK_B The other one of two differential signals from WK
to MCB
J2-B3 -
Display Board
Signals from MCB to Control Panel are listed as follows.
Name Description Attribution Scale Pin Comment
SPI_CLK Clock of SPI bus Digital 0/+15V J1-B23 -
SPI_MOSI Data from MCB to Control Panel Digital 0/+15V J1-C24 -
SPI_/CS1 Chip select 1 for MAX9654 Digital 0/+15V J1-A25 +15V= effective
SPI_/CS2 Chip select 2 for MAX7301 Digital 0/+15V J1-A28 +15V= effective
LED_
YELLOW_N
Yellow led lights signal Digital 0/+15V J1-C23 0V= effective
Signals from Control panel to MCB are listed as follows.
Name Description Attribution Scale Pin Comment
SPI_MISO Data from Control Panel to MCB Digital 0/+15V J1-A23 -
DB_INT Interrupt of Control panel Digital 0/+15V J1-B25 +15V= effective
User Interface Control
Key Switch
Signals from key switch to MCB are listed as follows.
Name Description Attribution Scale Pin Comment
KEYSW_ON The termination which
indicates lift column and x-ray
are both enable
Passive Open/Close J1-C26 KEYSW_ON & KEYSW_COM is
connected means both lift column
and exposure enable function
have been selected.
KEYSW_OFF The termination which
indicates lift column is enable
and x-ray is disable
Passive Open/Close J1-B16 KEYSW_OFF & KEYSW_COM is
connected means lift column
function have been selected.
KEYSW_COM Common termination Passive - J1-A24 -
Hand Switch
Signals from hand switch to MCB are listed as follows.
Name Description Attribution Scale Pin Comment
HAND_FLU Hand switch
termination
Passive Open/Close J1-B28 HAND_FLU & HAND_COM is
connected means HAND_FLU