Connecting To The Data Port - Nellcor OxiMax N-600x Service Manual

Data Port Interface Protocol

Connecting to the Data Port

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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)
5 Signal Ground (isolated from earth ground)
6 AN_SpO (analog saturation output)
2
7 Normally Open (N.O.), Dry Contacts, for Nurse Call
(N.O. with no audible alarm)
8 Normally Closed (N.C.), Dry Contacts, for Nurse Call
(N.C. with no audible alarm)
9 RXD- (R-422 negative output)
10 Signal Ground (isolated from earth ground)
11 Nurse Call (RS-232 level output [-5 to -12 VDC with no audible alarm]
[+5 to +12 VDC with audible alarm])
12 TXD- (RS-422 negative output)
13 AN_Pulse (analog pulse rate)
14 AN_Pleth (analog Pleth waveform output)
15 Nurse Call Common for Dry Contacts
Note: When the instrument is turned off, the contact at pin 7 is closed and pin 8
is open.
The pin layout is illustrated in Figure 16 is viewed from the back of the monitor.
An AMP connector is used to connect to the data port. Use AMP connector (AMP
P/N 747538-1), ferrule (AMP P/N 1-747579-2), and compatible pins (AMP P/N
66570-2).
Figure 16: Data Port Pin Layout
Table 21: Data Port Pin Outs
9 10 11 12 13 14 15
1 2 3 4 5 6 7 8