QTech Q23, Руководство пользователя

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CONNECTIONS
Q23 Expansion Module Page 31
In a standard application of the Q23 Module the RS232 serial port operates at 19,200 baud, the maximum
allowable cable length is typically 15 metres.
Standard 8 way RJ45 crimp plugs are used in making up RS232 serial port interconnection cables. These plugs
are designed for use with stranded (24/26 AWG) 8 core flat data cable. An RJ45 crimping tool must be used to
crimp the RJ45 plugs onto the data cable to ensure proper and reliable crimping. Improperly crimped connectors
can damage the RJ45 socket and cause unreliability.
Note In electrically noisy environments it may be necessary to use screened data cable for longer lengths of
cable.
The RS232 Clear to Send (CTS) and Request to Send (RTS) signal lines must be bridged at the Data Terminal
Equipment for the RS232 port to be enabled.
Note RXD is serial data into and TXD is serial data out of the Q23 Processor.
The connections to the RJ45 RS232 serial port are shown in the following table:
Function
Pin 1 Unconnected
Pin 2 RTS
Pin 3 CTS
Pin 4 Ground
Pin 5 RXD
Pin 6 TXD
Pin 7 Unconnected
Pin 8 Ground
RS232
– RJ45 Connections
RS485 Serial Port
The RS485 serial port (Intelligent Peripheral Bus) is used for inter-module communications over long distances of
cables at high speed. The RS485 serial port connector is a 4 way RJ10 connector located on the bottom edge of
the Q03 Processor.
In a standard application of the Q23 Module the RS485 serial port operates at 9600/19200 baud, the maximum
allowable cable length is typically 1000 metres.
Standard 4 way RJ10 crimp plugs are used in making up RS485 serial port interconnection cables. These plugs
are designed for use with stranded (24/26 AWG) 2/4 core twisted pair data cable. The cable used should have a
characteristic impedance of approximately 120 ohms. An RJ10 crimping tool must be used to crimp the RJ10 plugs
onto the data cable to ensure proper and reliable crimping. Improperly crimped connectors can damage the RJ10
socket and cause unreliability.
The connections to the RJ10 RS485 serial port are shown in the following table:
Function
Pin 1 Unconnected
Pin 2 485+
Pin 3 485-
Pin 4 Unconnected
RS485
– RJ10 Connections