18
PURE NETWORKING RS-232/422/485 TO TWISTED-PAIR DEVICE SERVER
NOTES
• To avoid incorrect connection, review your DTE or DCE’s DIP-switch
settings (see Sections 3.7 and 3.8) and the converter’s connector pin
configurations (see Section 3.5) before installation.
• For RS-422/485 devices that aren’t designed to provide DB9
connection, ignore the DTE/DCE mode installation procedure (Sections
3.7 and 3.8) and check the pin configuration to connect the devices.
• For first-time installation, use console mode to set up the connection
configuration with RS-232 cable.
3.7 Connection to Data Terminal Equipment (DTE)
1. Make sure DIP-switch 1 is in the “OFF” position. (This disables console
mode.)
2. Set DIP-switches 2, 3, and 4 according to the wire type as indicated in Table
3-3.
Table 3-3. DIP switches 2–4 settings.
Function
DIP-Switch 2
DIP-Switch 3
DIP-Switch 4
RS-232
On
Off
Off
4-wire (RS-232/485)
Off
On
Off
2-wire (RS-485)
Off
Off
On
NOTE
There isn’t a switch for DTE/DCE. Configure the attached device as a
DTE or DCE by using either a null-modem cable or a straight-through
cable. This DTE/DCE configuration only applies to RS-232 ports.
3. Prepare TIA/EIA-574 compliant crossover shielded cables with DB9
connectors.
4. Connect the DB9 male connector at the end of the cable to the server’s DB9
female connector.
5. Connect the DB9 male or female connector at the other end of the cable to
the DTE’s DB9 male or female connector.
Содержание LS4103A
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