13 power button connector (pwr_btn1), 14 reset button connector (rst_btn1), 15 rs-232 serial port connectors (com2, com3) – IEI Integration ECW-281B_D2550 User Manual
Page 100: 16 rs-422/485 serial port connector (com4), Figure 3-15, If the ecw-281b-d2550 fails to boot due to im
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ECW-281B-D2550 Embedded System
Page 86
6.2.13 Power Button Connector (PWR_BTN1)
6.2.14 Reset Button Connector (RST_BTN1)
6.2.15 RS-232 Serial Port Connectors (COM2, COM3)
PIN NO.
DESCRIPTION
PIN NO.
DESCRIPTION
1 DCD
2 DSR
3 RXD
4 RTS
5 TXD
6 CTS
7 DTR
8 RI
9 GND
10 GND
6.2.16 RS-422/485 Serial Port Connector (COM4)
PIN NO.
DESCRIPTION
1
PWR_BTN+
2
PWR_BTN-
Table 6-14: Power Button Connector (PWR_BTN1) Pinouts
PIN NO.
DESCRIPTION
1
RESET+
2
RESET-
Table 6-15: Reset Button Connector (RST_BTN1) Pinouts
Table 6-16: RS-232 Serial Port Connector (COM2, COM3) Pinouts
PIN NO.
DESCRIPTION
1 RXD422-
2 RXD422+
3 TXD422+/TXD485+
4 TXD422-/TXD485-
Table 6-17: RS-422/485 Serial Port Connector (COM4) Pinouts
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