NELLCOR PURITAN BENNETT Symphony N-3000 Service Manual page 104

Technical Supplement
S- 14
J12, J22 — These are two identical connectors that interface to the SpO
module. Power and stackbus signals are sent to these modules. Additionally,
a connection between these two connectors allows the modules to
communicate without stackbus, if necessary.
Table S4-3: J12, J22 Inter Module Connector
Pin No. Pin Description
1 Ground
2 VDD
3 Internal stackbus
4 VDD
5 Signal line from expansion module to SpO
6 VDD
7 Signal line from SpO
8 Module reset
9 High voltage power
10 Ground
11 Not used
12 Ground
13 Not used
14 Ground
J5 — Connector J5 connects to the display board, which allows the UIF
module to control the monitor display. Signals at this connector include
power, serial clock and data lines, button signal, and charging battery
indicator current.
Table S4-4: J5 Display Connector
Pin No. Pin Description
1 Power (from switch–controlled by external watchdog) Power
2 Power (from switch–controlled by external watchdog)
3 Power for green Power On LED
4 Serial clock
5 LED drivers latch enable
6 Data out
7 Power to Battery Charging LED
8 Not used
9 On button
10 Button voltage
11 Not used
12 Charge bus voltage
13 Digital ground
14 Digital ground
2
to expansion module
2
2
Input/Output/Power
Power
Power
I/O
I/O
I/O
I/O
I/O
I/O
Power
Power
n/a
Power
n/a
Power
Input/Output/Power
Power
Power
O
O
O
Power
n/a
I
I
n/a
Power
Power
Power