Download VS NetCom Devices

9.
HARDWARE DETAILS
So far many details of the hardware are not covered. The information is
provided in this section.
9.1. SERIAL PORT
The serial ports in the NetCom Devices follow the specifications of
RS 232. On some models it is also possible to use the serial port in
RS 422 or RS 485 mode. This is defined by a set of DIP-switches. Here
is a list of the available modes and the switch settings.
Warning: a bad configuration may cause serious damage in the
NetCom or the connected device.
Switch
Line Mode, Comment
S1 S2 S3 S4
positions
Configuration via serial port Note 1
RS232
Off Off On On
Data communication
Reload Factory values Note 1
RS422
Data communication
Note 2
RS485
by RTS
Off On
Off On On On
Point-to-multipoint
4 wire Full Duplex
RS485
by ART
Off Off
On Off
On On Off On
2 wire Half Duplex with Echo
2 wire Half Duplex without Echo
Off Off
4 wire Full Duplex
On Off
On Off Off On
2 wire Half Duplex with Echo
2 wire Half Duplex without Echo
Table 7: Switch Configuration of NetCom 113, 413 and 813
68
Off Off