11 MIC-770 User Manual
Chapter 2 H/W Installation
2.3.1.1 COM connector
MIC-770 provides four 9-pin D-sub connectors, two of which offer RS-232/422/485
and the other two offer RS-232 serial communication interface ports. Default setting is
RS-232, but this can be modified by BIOS setting. You can find detailed setting meth-
ods in Chapter 3.
2.3.1.2 Ethernet connector (LAN)
MIC-770 is equipped with two Ethernet controllers that are fully compliant with IEEE
802.3u 10/100/1000 Mbps CSMA/CD standards. LAN1 is equipped with Intel i219
and LAN2 is equipped with Intel i210. The Ethernet port provides a standard RJ45
jack connector with LED indicators on the front side to show its Active/Link status and
Speed status.
Figure 2.2 Ethernet Connector
Table 2.2: COM Connector Pin Assignments
RS-232 RS-422 RS-485
Pin Signal Name Signal Name Signal Name
1DCD Tx- DATA-
2RxD Tx+ DATA+
3TxD Rx+ NC
4DTR Rx- NC
5 GND GND GND
6DSR NC NC
7RTS NC NC
8CTS NC NC
9RI NC NC
Note! NC represents “No Connection”.
Table 2.3: Ethernet Connector Pin Assignments
Pin 10/100/1000BaseT Signal Name
1TX+
2TX-
3RX+
4MDI2+
5MDI2-
6RX-
7MDI3+
8MDI3-
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