IEI Integration ECW-281B_B2-D525 - Manual (Page 40)

ECW-281B/B2-D525 Embedded System
Page 27
communication channel but, with the COM2 function select jumper, can be configured as
either an RS-422 or RS-485 serial communications channel.
Figure 3-11: 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 3-11: RS-232/RS-485 Serial Port Connector Pinouts
3.3.11 USB Connectors (Internal)
CN Label: USB4
CN Type: 8-pin header (2x4)
CN Location: See
7755
Figure 3-12
CN Pinouts: See
7755
Table 3-12
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.