User guide

AFL-4 Series-N270 User Manual
Page 69
PIN NO. RS-232 RS-422 RS-485
1 DCD TX- D-
2 RX TX+ D+
3 TX
4 DTR
5 GND
6 DSR RX-
7 RTS RX+
8 CTS
9 RI
Table 4-8: RS-232/422/485 Pinouts
Figure 4-25: Serial Port Pinouts
4.11.4 USB Device Connection
There are four external USB 2.0 connectors. All connectors are perpendicular to the
AFL-4 Series-N270. To connect a USB 2.0 or USB 1.1 device, please follow the
instructions below.
Step 1: Located the USB connectors. The locations of the USB connectors are shown
in Chapter 2.
Step 2: Align the connectors. Align the USB device connector with one of the
connectors on the bottom panel. See
Figure 4-26.