bürkert 8225 Bedienungsanleitung Seite 77

3 INSTALLATION
3.2.9 Electrical wiring, panel-mounted version, with relays
Before wiring the device, please read § 3.2.1 and 3.2.3 carefully.
Install the transmitter into the panel as described in § 3.1.2. Connect the terminal strips as
indicated below.
Only manipulate the switch when the device is not powered.
Switch 1: see
Fig. 3.9
Strap to be removed if
4-20 mA output is used
Connecting the remote
conductivity sensor:
1 : Pt1000
2 : Pt1000
1)
3 : Conductivity electrode
4 : Conductivity electrode 1)
PE : Conductivity sensor cable
shielding
1) By tubular cells, connect
terminal 3 to the internal
electrode and terminal 4
to the external one
Fig. 3.17
Wiring the panel-mounted transmitter, with relays
Connection to a PLC
The 4-20 mA output of the transmitter, 12-30 VDC with relays can be connected to a PLC.
Depending on the PLC type, set switch [1] to position "SOURCE" or to position "SINK".
See Fig. 3.14.
Connection to the conductivity sensor type 8220
Connect the separate transmitter with relays the same way as the separate transmitter
without. See Fig. 3.16.
L- (0V)
L+ (12-30 VDC)
4-20 mA output
CURRENT
SOURCE SINK
NC L+
Without
With L+
Iout
Supply
SENSOR
12..30Vdc
1
PT1000
2
3
SENSOR
CELL
4
1 2 3 4 PE
3A/230VAC
Relay 2 (see
Relay 1 (see
ex. Fig. 3.8)
ex. Fig. 3.8)
E-29-
CONDUCTIVITY 8225
Connect the power supply cable
shielding
PE
PE
L- PE
L-
Relay cables must be
fitted here to the board
using the supplied cab-
le clips (see § 3.2.3)