Hirschmann OZD Genius G12-1300, User Manual

Page: 48 / 72

48
Installation OZD Profi 12M ...
Release 01 07/2017
Note:
– If the repeater is at the beginning or end of a bus segment, this connector
must have an activated bus terminal resistor combination.
– Ensure that the bus segment connected to the RS 485 interface is
terminated at both ends.
– Only use a connecting cable which is terminated at both ends to connect
a single device.
– All PROFIBUS bus connector plugs in a network must be securely
screwed onto the RS 485 interfaces.
– Attaching or removing the bus connector plugs, inadequately attached
bus connector plugs or loose bus wires within the plug can lead to
malfunctions in the optical and electrical networks.
Proceed as follows:

Attach or remove the RS 485 bus connector plug quickly and without
twisting them.

Remove the RS 485 bus line from the OZD Profi 12M ... if a device is not
connected to the other end, or there is an OZD Profi which has been
disconnected from the power supply. The open line otherwise acts as an
antenna and can cause interference.

When connecting a RS 485 bus line to the OZD Profi 12M … in an active
network, keep to the following sequence in order to avoid interference:
– Place the RS 485 bus connector plug onto the device which is to be
connected (e.g. to a programming device) and screw it on tightly.
– Attach the RS 485 bus connector plug to the OZD Profi 12M ... quickly
and without twisting the connector, and screw it on tightly. Proceed in
the reverse order when removing a device from the network.
Data rate Range per segment
12 Mbit/s 100 m
6 Mbit/s 100 m
3 Mbit/s 100 m
1.5 Mbit/s 200 m
500 kBit/s 400 m
187.5 kBit/s 1000 m
93.75 kBit/s 1200 m
45.45 kBit/s 1200 m
19.2 kBit/s 1200 m
9.6 kBit/s 1200 m
Table 6: Range of RS 485 bus segment with cable type A