35
Interfaces and Connectible Terminals
S
0
Ports
Termination
Each interface card has 16 DIP
switches (S1 to S16, two per S
0
inter-
face). The DIP switches activate the
required terminating resistors for
the S
0
buses (100 ohms per S
0
bus).
In the default setting, all terminat-
ing resistors are activated (Default:
on).
MX+S01-8: Location of DIP switches S1 to S16
Note:
The following configuration
information applies to external as
well as internal S
0
interfaces.
Bus Configuration: OpenCom 510
at the End of an S
0
Bus
If a OpenCom 510 is connected at
the end of an S
0
bus, the terminating
resistors of the relevant S
0
interface
cards must be activated.
In a typical configuration, the
OpenCom 510 will be connected to
the network termination for basic
access (NTBA) with an externally
switched S
0
port; therefore, all ter-
minating resistors of the interface
card are activated in the default set-
ting.
Pin Number
Assignment
1
Not used
2
Not used
3
Send +
4
R
5
Receive -
6
Send -
7
Not used
8
Not used
1
2
ON
Summary of Contents for OpenCom 510
Page 1: ...OpenCom510 Mounting and Commissioning User Guide ...
Page 160: ...158 Index Notes ...
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