Agilent Technologies 990 - Page 114

8 Communications
Access the Connection Ports
114 Agilent 990 Micro GC User Manual
Table 28 COM 2 and COM 3 PINs
Com port PIN No. RS 232 RS 422/485 RS485 2-wire
COM2 1 GND GND GND
2RTSTX-Data-
3TXDTX+Data+
4RXDRX+not used
5CTSRX-not used
COM3 6 GND GND GND
7RTSTX-Data-
8TXDTX+Data+
9RXDRX+not used
10 CTS RX- not used
Figure 49. COM 2 and COM 3 detail
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