IEI Integration ECW-281B-N270-WT v3.01 - Manual (Page 47)

ECW-281B/281B2-R30/N270 Embedded System
Page 32
Figure 3-12: RS-232/422/485 Serial Port Connector Location
PIN NO. DESCRIPTION PIN NO. DESCRIPTION
1 NDCD 2 NDSR2
3 NRX 4 NRTS2
5 NTX 6 NCTS2
7 NDTR 8 NRI2
9 GND 10 GND
11 TXD485+ 12 TXD485-
13 RXD485+ 14 RXD485-
Table 3-12: RS-232/RS-485 Serial Port Connector Pinouts
3.3.12 USB Connectors (Internal)
CN Label: USB01 and USB23
CN Type: 8-pin header (2x4)
CN Location: See
777
Figure 3-13
CN Pinouts: See
777
Table 3-13
The 2x4 USB pin connectors each provide connectivity to two USB 1.1 or two USB 2.0
ports. Each USB connector can support two USB devices. Additional external USB ports
are found on the rear panel. The USB ports are used for I/O bus expansion.