3: Installation: EDS4100
EDS Device Servers User Guide 21
Serial Ports
The front of the EDS4100 has four male DB9 serial ports. These ports allow you to
connect up to four standard serial devices:
All four serial ports support RS-232 devices. See Figure 3-3 for pin assignments.
Serial ports 1 and 3 also support RS-422 and RS-485 serial devices.
See
Figure 3-4 for pin assignments.
All four serial ports are configured as DTE and support baud rates up to 230,400 baud.
Figure 3-3. RS-232 Serial Port Pins (Serial Ports 1, 2, 3, 4)
Figure 3-4. RS-422/RS-485 Serial Port Pins
Note: Multi-drop connections are supported in 2-wire mode only.
RS-422/485 4-wire Pin Assignments
(Serial Ports 1 and 3)
RS-485 2-wire Pin Assignments
(Serial Ports 1 and 3)