RS232+RS485+Relay Connector
The RS485+RS232+Relay connector is a 10-pin 2.5mm connector,
as Figure 5 shows. As for the definition of every pin, please
refer to Table 2.
Table 2
RS232 / RS485 Pin Definition:
Pin Number Definition Description
Pin 1 GND System Ground
Pin 2 RS232_0_RXD CPU UART0, RS232 RXD signal
Pin 3 RS232_0_TXD CPU UART0, RS232 TXD signal
Pin 4 RS232_2_RXD CPU UART2, RS232 RXD signal
Can be set as RS485_2+(A).
Pin 5 RS232_2_TXD CPU UART2, RS232 TXD signal
Can be set as RS485_2-(B).
Pin 6 RS485_3+ CPU UART3, RS485 +(A) signal
Can be set as GPIO Output.
Pin 7 RS485_3- CPU UART3, RS485 –(B) signal
Can be set as GPIO Output.
Pin 8 Relay NO Relay Normally Open
Pin 9 Relay COM Relay Common
Pin 10 Relay NC Relay Normally Connected
ATTENTION:
(1) The RS232_2 can be set as the RS485 signal. If you need it
to work as RS485, please contact us before shipping.
(2) The RS485_3 can be set as Two 5V logic GPIO Output, these
two TPIO can be used as Wiegand signal. If you need them to
work as GPIO, please contact us before shipping.
(3) RS485_3 automatically controls input/output direction. It
doesn’t need software control.
