I-2533CS series CAN to Single Mode Fiber Bridge User Manual (version 1.0.0)
Page: 11
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2.3. Pin
Assignment
The pin assignments of COM port, CAN port, fiber port and power connector of
I-2533 series are shown in the following tables.
Table 2-1 Pin Assignment
Port Name
Description
COM TXD
TXD pin of RS-232 port.
RXD
RXD pin of RS-232 port.
GND
SG (or GND) pin of RS-232 port.
CAN CAN_L
CAN_Low, signal line of CAN port.
CAN_H
CAN_High, signal line of CAN port.
CAN_GND CAN_Ground, ground voltage level of CAN port.
Fiber TxD
Transmit optic data.
RxD
Receive optic data.
Power +VS
Voltage Source Input. +10V
DC
~ +30V
DC
.
GND
Power Ground.
F.G.
Frame Ground.
Sometimes, the CAN_GND voltage level of different CAN devices on a CAN bus
system are not equal. In this case, it could cause some problems and derogate the
system stability. There is one way to relieve this situation; users can connect the
CAN_GND of different CAN devices with each other to balance the voltage level of
CAN_GND.
Electronic circuits are always influenced by different levels of Electro-Static
Discharge (ESD), which become worse in a continental climate area. F.G. provides a
path for conducting the ESD to the earth ground. Therefore, connecting the F.G
correctly can enhance the capability of the ESD protection and improve the module’s
reliability.
Wiring of CAN_GND and F.G. is not necessary; users can modify the configuration
of wiring according to real applications.
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