7
UNO-1252G User Manual
Chapter 2
H
ardware
F
unctionality
2.2
Isolated Serial Interface (COM1~COM2)
UNO-1252G offers standard isolated RS-232/485 (COM1), one isolated RS-232
(COM2) serial communication interface ports:
Isolation Protection 1,000 VDC
Overvoltage Protection 30 VDC
2.2.1
Isolated RS-232/485 Interface (COM1)
The UNO-1252G offers one isolated RS-232/485 serial communication interface
ports as COM1. The default COM port mode is RS-485. User can switch either to
RS-232 or RS-485 mode by setting the switch. The terminal resistance for long dis-
tance signal transmission in RS-485 mode is also set by the switch.
Refer to Appendix A.2 for their pin assignments and switch setting.
2.2.2
Isolated RS-232 Interface (COM2)
The UNO-1252G offers one standard isolated RS-232 serial communication interface
ports as COM2. The COM2 is designed as console port for user's configuration.
Refer to Appendix A.3 for their pin assignments.
2.3
Ethernet LAN Connector
The UNO-1252G is equipped with two 10/100MB LAN controllers. The controller
employed Texas Instrument DP83848K Ethernet chipset that is fully compliant with
IEEE 802.3u 10/100Base-T CSMA/CD standards. The Ethernet port provides a stan-
dard RJ-45 jack on board, and LED indicators on the front side to show its Link
(Orange LED) and Active (Green LED) status.
2.4
Power Connector
The UNO-1252G comes with a Phoenix connector that carries 10~36 V
DC
external
power input, and features reversed wiring protection. Therefore, it will not cause any
damage to the system by reversed wiring of ground line or power line. Refer to
Appendix A.7
2.5
USB Connector
The UNO-1252G provides one USB2.0 host and one USB device connectors. The
USB interface supports Plug and Play, which enables user to connect or disconnect a
device without turning off the computer. The USB host port is EHCI Rev. 2.0 compli-
ant also provides hot swapping for up to 127 external devices. Refer to Appendix A.5
for their pin assignment.
Summary of Contents for UNO-1252G Series
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Page 35: ...Appendix A A System Settings and Pin Assignments...