DURAG D-R 290, Operating Manual

Page: 80 / 202

5 | Installation
80 D-R 290
1 Service connection
(mini-USB)
2 External 4-20 mA temperature
transmitter (4-pin M12 socket)
(
option)
3 Main connection plug 4 Protective device measuring head
(8-pin M12 socket)
5 Protective device reflector
(8-pin M12 socket)
Fig. 5.12: Connection plugs and sockets on the underside of the housing
From left to right, these are:
1. Mini-USB socket for connecting a PC, laptop or tablet to the
D-ESI 100 [
}
195] .
2. In a special version, a 4-pin M12 socket for connecting a 4-20 mA temperature
sensor for measured value standardisation.
3. Main connecting plug for the supply via D-TB 100 or D-ISC 100.
4. 8-pin M12 socket for connecting a purge air sensor and protective device (fail-safe
shutter) for the measuring head.
5. 8-pin M12 socket for connecting a purge air sensor and protective device (fail-safe
shutter) for the reflector.
The D−TB 100 supply unit
or the control unit D−ISC 100 is connected at the main connecting plug (item 3 in
Fig. 5.12 ). This connection is described in section 5.6.1 Connecting the supply and
control unit [
}
96] .
The connection of the protective device for the measuring head at the socket item 4
( Fig. 5.12 ) and the protective device for the reflector at the socket item 5 is described
in sections 5.5.4 D-SK AE electrical connection [
}
88] ( Fig. 5.22 and Fig. 5.23 ).
The connection of the external 4-20 mA temperature transmitter at the socket item 2 is
performed according to Fig. 7.24 (see section 7.7.10.2 Temperature compensation via
an external temperature transmitter (special variant) [
}
149] ).
Meaning of the LEDs
At the side of the measuring head casing there is a viewing window allowing 4 LEDs
to be viewed. The signals of these LEDs have the following meaning:
5.4.6