User manual

UNO-2052E User Manual 8
2.2 COM1: RS-232 Interface
The UNO-2052E offers one standard RS-232 serial communication inter-
face port (COM1). Please refer to A.2 for the pin assignments.
2.3 CAN 1~CAN 2: CAN Interface
The UNO-2052E offers two CAN serial communication interface ports.
COM3 and COM4. Please refer to Appendix A.3 for the pin assignments.
Control Area Network
The CAN (Control Area Network) is a serial bus system specially suited
for networking “intelligent” I/O devices as well as sensors and actuators
within a machine or plant. Characterized by its multi-master protocol,
real-time capability, error correction, high noise immunity, and the exist-
ence of many different silicon components, the CAN serial bus system,
originally developed by Bosch for use in automobiles, is increasingly
being used in industrial automation.
For further information about CAN controllers, please refer to the data
sheet of JIA-1000.
2.4 LAN: Ethernet Connector
The UNO-2052E is equipped with a Realtek RTL8139C Ethernet LAN
controller that is fully compliant with IEEE 802.3u 10/100Base-T
CSMA/CD standards. The Ethernet port provides a standard RJ-45 jack
on the board, and LED indicators on the front side shows its link (Green
LED) and active (Yellow LED) status.
2.5 Power Connector
The UNO-2052E comes with a Phoenix connector to provide a 9~36
VDC external power input, and features reversed wiring protection.
Therefore, it will not cause any damage to the system in the case of
reversed wiring of ground line and power line.