4 Setting Up
4.11 Connecting the analog voltage outputs (optional)
34
Version 04 05/2014
Note:
The screw terminal block can be released from the device
to connect the lines for the operating voltage supply.
䊳
Only supply the repeater with a stabilized
safety
extra-low voltage (SELV)
in accordance with
IEC/EN 60950-1, EN 61131-25, +32 V maximum
(+24 V typ.).
It is supplied via the 7-pin terminal block on the top of
the repeater.
䊳
To improve the operating safety, a redundant opera-
ting power supply consisting of separate sources can
be used. You can input the voltage supply in two
ways:
– te24 V (L1+) of the terminal block
– te24 V (L2+) of the terminal block
The minus connection for each is indicated by “0 V”.
䊳
The two voltages can have any values – even different
ones – within the specified limits.
However, there is no load distribution. If necessary,
the power supply unit with the higher output voltage
must supply the power alone.
4.12 Connecting the operating voltage supply
+24 V(L1+)
0 V
FAULT
+24 V(L2+)
0 V
Fig. 14: Operating voltage supply – pin assignment on the 7-pin
screw terminal block
䊳
There are LEDs on the front of the device for
diagnostic purposes. They are explained in chapter
5.1, p. 35.
4.13 Checking the LED indicators
䊳
The operating voltage inputs are protected against
incorrect pole connection.
䊳
The operating voltage(s) are electrically isolated from
the function ground connection and from the other
connections.
Notes:
For a measured value to be valid, it is necessary that the
partner OZD Profi on the other end of the optical fiber
transmits regular PROFIBUS telegrams. This can be seen
in the illustration of the LED for the partner OZD Profi
(see chap. 5.1, “LED displays”, page 35).
An OZD Profi 12M … PROi is no substitute for a calibra-
ted, optical level meter. However, it provides each optical
channel with a voltage derived from the peak value of the
optical Profibus telegram without disrupting the commu-
nication of data. With regular bus operation, this analog
voltage can be used as an indicator for an alteration in
optical attenuation. Because data traffic and temperature
can affect the voltage value, you should not set any
warning threshold too close to the actual value.