Serial Device Communications; Requirements - GE TruTrak+ 3900 User Manual

B/Communications
This appendix covers
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WARNINGS: Electrical shock hazard
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Accessory equipment connected to the RS-232 serial/analog connector must be certified
according to the current version of the respective IEC/EN standards (e.g., IEC 60950 for data
processing equipment and IEC/EN 60601-1 for medical equipment). All configurations shall
also comply with IEC/EN 60601-1-1. Anyone who connects additional equipment to the RS-232
serial/analog connector configures a medical system, and is therefore responsible that the
system complies with the requirements of IEC/EN 60601-1-1. If in doubt, call your local
authorized service office. The 3900/3900P is referred to as an IEC/EN 60601/F device
in the summary of situations table contained in IEC/EN 60601-1-1.

Serial device communications

If you want to send data directly to a serial device (e.g., a computer) and to an
analog device simultaneously, you may purchase the Datex-Ohmeda serial/analog
cable; see Parts list in chapter 6.

Requirements

Connect the oximeter only to computers with
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The settings on the computer must be:
Serial device connections for computer/oximeter communication.
Analog device connections.
Measure the oximeter's leakage current whenever an external device is connected to the
RS-232. Forward and reverse polarity: 100 microamperes maximum.
Because the unit is not grounded when it is operating on battery power, do not connect
any equipment to the RS-232 connector on the rear panel unless the unit is connected to
the AC main power supply.
An RS-232 interface.
The ability to accept ASCII-formatted data at a baud rate of at least 9600.
9600, 19.2K, 38.4K, or 57.6K baud
8-bit data
No parity
1 stop bit
1 start bit
Full duplex
Handshaking, CTS/RTS
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