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Printer / Serial Output
The Model 8500AV Oximeter provides output capability to a custom printer interface via the 9 pin Sub-D connector on
the top. This connector serves as a sensor input connector as well as a printer interconnect device. The 9 pin Sub-D
connector pin assignments are as listed in Table II.
Table II. Printer/Sensor Interface Assignments
PIN NUMBER
1
2
3
4
5
6
7
8
9
a. Serial format: (Real-time mode)
ASCII
9600 BAUD
9 Data Bits
1 Start Bit
1 Stop Bit
Note: The 9th data bit is used for parity in memory playback mode. In real time mode it is always set to the mark
condition. Therefore the real time data may be read as 8 data bits, no parity.
b. Serial Rate Mode: (Real-time mode)
Data is output once per second as: SpO2=xxx HR=yyy C/R
•
where xxx is O2 saturation 0-100 or --- if no data available
•
where yyy is pulse rate 0-450 or --- if no data available
ASSIGNMENT
Battery Voltage
Infrared Anode, Red Cathode
Infrared Cathode, Red Anode
Serial Data, TTL Levels
Detector Anode
Logic Level
Cable Shield
Coax Shield
Detector Cathode, + 5V
11
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