Covidien Nellcor OxiMax N-600x, Руководство оператора

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Managing Oximetry Data
78
Operator’s Manual
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RS-422 Format —Pins 1, 4, 9, and 12 provide RS-422 format data. When building an
RS-422 cable, add a resistor (120 ohms, 1/2 watt, 5%) between pin 1 and pin 9 of the cable
and keep cable length to a maximum of 4,000 feet. Plug the end of the cable with the
resistor added into the oximeter.
•
Differential Data Transmission —Pins 3 and 4 (TxD+ and TxD-) are the differential
transmit data pair.
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Differential Data Reception —Pins 1 and 2 (RxD+ and RxD-) are the differential receive
data pair.
Figure 71 illustrates the pin layouts as viewed from the rear panel. The conductive
shell connects to earth ground when connected to a PC or printer.
Figure 71. Data Port Pin Layout
Table 9. Data Port Signal Pinouts
Pin
Number Signal Name
1 RxD+ (RS-422 [+] input)
2 RxD_232 (RS-232 input)
3 TxD_(RS-232 output)
4 TxD+ (RS-422 [+] output)
5 Signal Ground (isolated from Earth Ground)
6 AN_SpO2 (analog saturation output)
7 NC_NO (relay closure nurse call, normally open)
8 NC_NC (relay closure nurse call, normally closed)
9 RxD- (RS_422 [-] input)
10 Signal Ground (isolated from Earth Ground)
11 Nurse Call (RS-232-level-output)
12 TxD- (RS-422 [-] output)
13 AN_PULSE (analog pulse rate output)
14 AN_PLETH (analog pleth waveform output)
15 NC_COM (relay closure nurse call, common lead)