105MN024-010
TPRN
The connection baud rate can be set to 9600bps or 19200bps, by properly setting the
dip-switch 5 standing on the interior TPRN backplane (fi g. 4.1.7). The baud rate setting
through dip-switch 5 is shown in Table 4.1.1.
Whichever baud rate you choose through dip-switch 5, remember that:
• the same RS232 connection speed must be set up on the remote supervision unit
• the baud rate which is selected through the dip-switch 5 sets the connection speed for
both the RS232 port and the RS485 port as the TPRN uses both ports with the same rate.
RS485 port
The RS485 port consists of two RJ45 connectors, which can both work as input or output ports
towards a RS485 bus.
This RS485 bus has to be used in order to connect a multi sub-rack system to the remote
supervision unit. In this case:
• the TPRN sub-racks have to be connected to one another via RS485 bus in a daisy chain;
• In order to monitor the whole system, the remote supervision unit has to be connected to
one of the TPRN sub-racks through RS232 port.
Before connecting the TPRN sub-racks belonging to a multi-sub-rack system, remember
to assign an exclusive binary address to each one. This is essential in order to allow the
Supervision System recognize the different master units without any confl icts.
The binary address assignment can be done through dip-switches 1,2,3,4, which are on the
interior TPRN backplane (see Figure 4.1.7). A list of correspondences between the addresses
and the dip-switches is provided in Table 4.1.3: simply note that dip-switch 1 is the least
signifi cant binary digit, while dip-switch 4 is the most signifi cant one.
The baud rate of the RS485 ports is the same as the RS232 port as per the dip-switch 5 setting.
Whichever baud rate you choose, remember that:
• the same RS485 connection speed has to be set up on for the entire connected device
(TPRN sub-racks or TSUN remote supervision unit);
• the baud-rate which is selected through the dip-switch 5 sets the connection speed for
both the RS485 port and the RS232 port.
Sub-D 15 poles male connector
PIN 1
PIN 9
PIN 6
PIN 15
Figure 4.1.8: sub-D 15 poles
male connector
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