CHAPTER 6
CABLING INFORMATION
Two special cables with a DB37
connector are provided in the package. This cable converts the signals
from the DB37 connector into two standard DB25 connectors.
6.1 RS422 Cabling Information
The signal assignments for a standard DB25 connector are shown as follows.
6.2 RS422 Cabling Connections
To connect RS422 ports to other DATA TERMINAL EQUIPMENT (DTE) devices, we recommend the use of DTE to DTE configuration which is shown as follows.
6.3 RS485 Cabling Information
The RS485 signal assignment is shown as follows.
The RS485 communication is based on cable sharing method which is connected as following:
| DB37 Pin# |
Channel |
Signal
Name |
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 |
1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 1 - 1 1 1 1 1 1 1 1 1 |
Ground
Transmit Data (+) Receive Data (+) Request to Send (+) Clear to Send (+) Data Set Ready (+) Ground DCD (+) Dtat Terminal Ready (-) Ring Indiccator (-) Transmit Data (+) Receive Data (+) Request to Send (+) Clear to Send (+) Data Set Ready (+) Ground DCD (+) Data Terminal Ready (-) Ring Indicator (-) Transmit Data (-) Receive Data (-) Request to Send (-) Clear to Send (-) Data Set Ready (-) DCD (-) Data Terminal Ready (+) Ring Indicator (+) Ground Ground Transmit Data (-) Receive Data (-) Request to Send (-) Clear to Send (-) Data Set Ready (-) DCD (-) Data Terminal Ready (+) Ring Indicator (+) |
6.1 RS422 Cabling Information
The signal assignments for a standard DB25 connector are shown as follows.
| Pin |
Name |
Description |
| 1 2 3 4 5 6 7 8 9 10 14 15 16 17 18 19 20 22 |
GND TX+ RX+ RTS+ CTS+ DSR+ GND DCD+ DTR - RI - TX - RX - RTS - CTS - DSR - DCD - DTR+ RI+ |
Ground
Transmit Data (+) Receive Data (+) Request to Send (+) Clear to Send (+) Data Set Ready (+) Ground Data Carrier Detect (+) Data Terminal Ready (-) Ring Indicator (-) Transmit Data (-) Receive Data (-) Request to Send (-) Clear to Send (-) Data Set Ready (-) Data Carrier Detect (-) Data Terminal Ready (+) Ring Indicator (+) |
6.2 RS422 Cabling Connections
To connect RS422 ports to other DATA TERMINAL EQUIPMENT (DTE) devices, we recommend the use of DTE to DTE configuration which is shown as follows.
| HOST PC RS422 |
REMOTE PC RS422 |
| GND TX+ RX+ RTS+ CTS+ TX - RX - RTS - CTS - |
GND RX+ TX+ CTS+ RTS+ RX - TX - CTS - RTS - |
6.3 RS485 Cabling Information
The RS485 signal assignment is shown as follows.
| Pin |
Name |
Description |
| 1 2 3 14 15 |
GND TX+ RX+ TX - RX - |
Ground Transmit Data (+) Receive Data (+) Transmit Data (-) Receive Data (-) |
The RS485 communication is based on cable sharing method which is connected as following:
| Computer
at site 1 |
Computer
at site 2 |
|
TX+, RX+
TX -, RX - Ground |
TX+, RX+
TX -, RX - Ground |
