Datex-Ohmeda Communications; Connecting To The Data Port; Table 18: Data Port Pin Outs - Nellcor OxiMax N-595 Service Manual

Datex-Ohmeda Communications

Connecting to the Data Port

N-595
The Datex-Ohmeda monitor AS/3 must be configured for communications with
the Nellcor N-200 monitor in order to communicate with the N-595 monitor.
Refer to the AS/3 operator's manual for instructions on configuring the AS/3
monitor.
The N-595 sends SpO , pulse rate, and alarm status data to the Datex AS3
2
monitor.
The RS-232 hardwire interface cable has a DB-15 connector for the N-595 and the
applicable connector for the Datex monitor. Nellcor cable part number 902255 is
recommended for this interface.
Corrupt data will be indicated by a Communications Error displayed on the Datex
monitor.
When the N-595 is in the Datex mode of operation the interface baud rate is
automatically set to 2,400 bits per second.
WARNING: Do not silence the N-595 audible alarm or decrease its volume if
patient safety could be compromised.
The Datex-Ohmeda monitor does not indicate audible or visual alarms for
equipment interfaced. The N-595 monitor must be able to sound an audible alarm
in order to maintain patient safety.
Note: The parameters setup for the Datex-Ohmeda bedside monitor interface
may be saved as institutional default settings. See Setting Institutional
Defaults (Sample) on page 47. Use care when performing this procedure
because all settings will be saved as institutional default settings.
Data is transmitted in the RS-232 format (pins 2, 3, and 5) or RS-422 (pins 1, 4, 9,
and 12). RS-232 data can be transmitted a maximum of 25 feet, RS-422 data up to
4000 feet. The pin outs for the data port are illustrated in Figure 16.
Pin Signal
1 RXD+ (RS-422 positive input)
2 RXD_232 (RS-232 input)
3 TXD_232 (RS-232 output)
4 TXD+ (RS-422 positive output)

Table 18: Data Port Pin Outs

Data Port Interface Protocol
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