3 Hardware Description
3 Hardware Description
This section focuses on the options provided by the hardware of NetCom Plus Serial Device
Servers.
3.1 Serial Port Configuration
The serial ports in the NetCom
+
Devices follow the specifications of RS 232. On many models
it is also possible to use the serial ports in RS 422 or RS 485 mode. This is defined by a set of
DIP switches or by software. Here is a list of the available modes and the switch settings. Table
15a
shows the DIP positions. The light end is the position where the switch is pushed to.
Warning: a bad configuration may cause serious damage in the NetCom
+
or the connected device.
Off (Bottom)
On (Top)
(a) DIP Switch Description
Line Mode, Comment
S1
S2
S3
S4
Switch Positions
Configuration via Serial Port
1
Off
Off
Off
Off
Factory Settings
2
Off
Off
Off
On
Selected by Software
3
Off
Off
On
On
RS 232
Operation
On
Off
Off
Off
RS 422
4
4-wire Operation
On
Off
On
Off
4-wire with Rx-Termination
On
Off
On
On
RS 485
4
,
5
4-wire Operation
On
On
On
Off
4-wire with Rx-Termination
On
On
On
On
2-wire Operation
On
On
Off
Off
2-wire with Termination
On
On
Off
On
(b) DIP Switch Configurations
Table 15: DIP Switches
September 2016
NetCom Plus User Manual
22
