Appendix D Interfacing to External Devices
The 248 has two data ports – Port 1 and Port 2.
Figure D-1. Port 1 (Female) Figure D-2. Port 2 (Male)
Pin 1 Not used Pin 1 Not used
Pin 2 Tx data (transmitted) Pin 2 Tx data (transmitted)
Pin 3 Rx data (received) Pin 3 Rx data (received)
Pin 4 DTR (data terminal ready) Pin 4 DTR (data terminal ready)
Pin 5 0V digital Pin 5 0V digital
Pin 6 Not used Pin 6 Not used
Pin 7 Not used Pin 7 Not used
Pin 8 CTS (clear to send) Pin 8 CTS (clear to send)
Pin 9 Not used Pin 9 +5V digital
For full details on interfacing to external devices, refer to the 248
Interface Manual (Cat. 570030).
The 248 supports three data communication protocols on both ports.
CMSI
CMSI allows communication with Ciba Corning Diagnostics
instrumentation, for example the 270 CO-oximeter, 2500 CO-oximeter
and the Complement data management system. A current loop
convertor is required for interfacing with some of these systems.
NOTE: When communicating with these older systems the 248 emulates
a 178 blood gas analyzer. As such, QC samples are reported as syringe
samples.
Data Format
Baud rate 7200
Start bit 1
Stop bits 2
Data bits 7
Parity ON EVEN
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