NEXCOM APPC 1220T User Manual
Page 42
Copyright © 2011 NEXCOM International Co., Ltd. All Rights Reserved.
Chapter 2: Jumpers and Connectors
APPC 1220T/1221T/1520T/1521T/1720T/1721T User Manual
27
USB Ports
Connector type: Dual USB port
Connector location: USB1 and USB2
Pin
Definition
Pin
Definition
1
VCC5
5
VCC5
2
USB0-
6
USB1-
3
USB0+
7
USB1+
4
GND
8
GND
USB1
Pin
Definition
Pin
Definition
1
VCC5
5
VCC5
2
USB2-
6
USB3-
3
USB2+
7
USB3+
4
GND
8
GND
USB2
Pin
Definition
Pin
Definition
1
TXD-: Transmit Data Negative
RXD-: Receive Data Negative
2
TXD+: Transmit Data Positive
RXD+: Receive Data Positive
3
Reserved
4
Reserved
5
Reserved
6
Reserved
7
Reserved
8
Reserved
9
Reserved (could be a 5V or 12V
power pin)
RS485
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