HACH LANGE EVITA OXY Series, Basic User Manual, Page: 95 / 375

English 95
The extension cable must not be longer than 1000 m. Also use for the
extension only two-wire, shielded cable (at least 2 x 0.2 mm²) (24 AWG).
The power supply of the signal converter should be connected to the
terminals L, N or PE (at 100–240 V AC).
Figure 14 Digital input
The digital input can only be used for the control of the
EVITA
®
INSITU transmitter. This function can be switched off via the
USC.
Note:
The digital input is available for the USC 5000 and USC 7000.
USC 7000 and OXY 4100/4150 with multidrop
Figure 15 USC 7000 and OXY 4100/4150 with multidrop
The model USC 7000 can communicate using HART
®
multidrop protocol
with up to 15 EVITA
®
OXY transmitters. It requires only two cables for
this.
The individual transmitters must be connected outside of the USC
junction box in parallel. With this inside the USC 7000 only two cables
and one shield are connected.
Note:
Components such as motors, pumps and computers can cause
great potential differences between the protective ground conductor and
the medium to be measured. This can lead to fluctuating measurement
values. If this problem occurs, you should install a ground electrode in
Input
USC
Digital input
USC
Function
On
DIG IN
On
Off
081R9433.02.01
1 The separating foil must not be removed from its original installation.
Bending of the separating foil is not a problem (e.g. when wiring the
instrument).
Digitaleingang
Relais 1
Relais 2
Relais 3
Relais 4
Relais 5
I AUS 1
I AUS 2
I AUS 3
I AUS 4
Abschirmung
Schwartz
Rot
N
1+
1