Technical Supplement
S- 9
J5 — contains power and signal lines used in the stack configuration to
communicate with the N -3000. These signal lines include the battery bus,
charge bus, digital and case ground, and the external Stackbus.
Table S4-2: J5 Upper Inter-Stack Connector
Pin No.
Pin Description
Input/Output/
Power
1
Chassis (case) ground
Power
2
Stackbus differential (positive)
Input/Output
3
Stackbus differential (negative)
Input/Output
4
Digital ground
Power
5
External charge bus
Power
6
Battery bus voltage
Power
7
N/C
n/a
8
Not used
n/a
9
Not used
n/a
10
Not used
n/a
J2 — connects to the monitor speaker.
Table S4-3: J2 Speaker Connector
Pin No.
Pin Description
Input/Output/
Power
1
Differential speaker
Input/Output
2
Differential speaker signal –
Input/Output
S4.2.2 Blood Pressure Module
The Blood Pressure module uses the Colin, model 1500 blood pressure
module. It consists of main CPU U2 for measuring blood pressure and sub
CPU U14 for monitoring the pressure and measuring time.
The pressure signal detected by HIC pressure sensor PM1 is calibrated to
approximately 10mv/mmHg by gain amplifier U12. The signal output is
converted by A/D converter U7 and read as pressure by U2 and U14.
The pulse wave is detected from the pressure signal and is filtered, amplified,
converted into a DC signal, and read by U2. The adult signal is amplified by
U18 and the neonate signal is amplified by U19.
The mechanical parts are a pump and bleed/dump valve.
S4.2.2.1 System Flow
When power is applied to the Blood Pressure module, initialization and zero
calibration of the pressure is performed. The module is then in a ready
condition which permits interruption from the UIF CPU.