RS-232 Interface Specifications
The Renaissance II Spirometry System
supports asynchronous commun-
ications to a computer system via a
RS-232C compatible serial port. Data
can be transmitted from the spirometer
only when it is docked in the base
station. The interface connection on
the base station is a standard 25-pin
IBM PC-AT style connector. The pin
locations for this connector are shown
in Figure 33. Puritan Bennett
recommends using a null modem cable
to connect the spirometer base station
to a PC.
Pin Function Descriptions
The function of the pins is described in Pin Function Descriptions (Table 11).
Pins 12, 13, 14, 16 and 18 are used for RS-232 communications for remote
control of the spirometer. All other pins are used for printer interfacing via
standard IEEE 1284 printer cable.
Table 11: Pin Function Descriptions
1
To Printer
2
To Printer
3
To Printer
4
To Printer
5
To Printer
6
To Printer
7
To Printer
8
To Printer
9
To Printer
10
To Base
11
To Base
12
To Base
13
To Base
P-495220-00 Rev. D
Figure 33: Pin locations (base station)
Data Strobe
Printer Data Bit 0
Printer Data Bit 1
Printer Data Bit 2
Printer Data Bit 3
Printer Data Bit 4
Printer Data Bit 5
Printer Data Bit 6
Printer Data Bit 7
Printer ACK
Printer Busy
RS232 Clear To Send
RS232 Receive Data
Technical References
13 12 11 10
9
8
7
6
5
4
25 24 23 22 21 20 19 18 17 16 15 14
Spirometer
Base Station
(PB-710)
3
2
1
76
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