GE Dash 3000, Руководство по обслуживанию

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9-48 Dash 3000/4000 Patient Monitor Revision A
2000966-339
Assembly Drawings: Port Connections
Capnostat III (CO
2
) Cable Connector
Connection to the Capnostat III is via the Novametrix standard 20-pin
circular connector. The pinout is as follows:
PIN SIGNAL NAME I/O SIGNAL DESCRIPTION DIAGRAM
1 O Capnostat Infra-red source drive positive (+)
2 SOURCE– O Capnostat Infra-red source drive negative (–)
3 EE_CS O Chip select to 93C46 EEPROM within Capnostat.
4 CO2_REF_IN I CO
2
reference channel
signal input from Capnostat which is not affected by the
presence of CO
2
.
5 CASE_HTR O DC voltage, generated from a software controlled PWM drive
signal, which controls the Capnostat case temperature.
6 CO2_IN I CO
2
data channel
signal input from Capnostat which is affected by the presence of
CO
2
.
7 EE_SCLK O Serial data clock to 93C46 EEPROM within Capnostat.
8 HTR_RTN – GND return for pins 5 and 16
9 EE_DATA_OUT I Data from 93C46 EEPROM within Capnostat (output from
EEPROM).
10 +5V – Logic supply voltage to Capnostat
11 EE_DATA_IN O Data to 93C46 EEPROM within Capnostat (input to EEPROM).
12 SPAN_SW* I Driven low to indicate that the Capnostat has been placed on
the REF cell.
13 SHIELD – Termination for both inner and outer shields of the Capnostat
cable - is connected to the main DAS floating shield plane and
cover.
14 ZERO_SW* I Driven low to indicate that the Capnostat has been placed on
the ZERO cell.
15 CASE_THERM I Case thermistor (also used for Capnostat presence detection).
16 DET_HTR O DC voltage, generated from a software controlled PWM drive
signal, which controls the Capnostat detector temperature.
17 DET_THERM I Detector thermistor
18 –12V – Negative (–) analog supply voltage to Capnostat
19 +12V – Positive (+) analog supply voltage to Capnostat
20 AGND – Analog GND
522A