E31.0.12.6C-06
Mounting and operating manual GIA 20 EB with electrically insulated supply
page 14 of 32
5.4.3.
Connection with configured high-side-switching output
(PNP output, switching to +Us)
Connection of consumer loads (relay and lamp)
Hint:
Connections 3 and 5 are internally electrically connected.
When switching higher currents (> 50 mA), the
–Uv connection should not be at-
tached to the device (connection 3) but to the -Us connection of the external pow-
er supply unit.
When doing this, you get rid off ground displacement.
5.4.4. Connection with configured push-pull-switching output
Connection of a semiconductor-relay
5.5. Common wiring of several devices
Inputs and outputs are not electrically isolated. When interconnecting several GIA20EB`s you have
to make sure that there is no potential displacement.
Make sure to observe the following points:
- When several GIA20EB`s are connected to the same power supply unit it is highly recommended
to isolate the sensors, measuring transducers etc.
- Whe
n the sensors, measuring transducers etc. are electrically connected, and you can’t manage
to isolate them, you should use separate electrically isolated power supply units for each devices.
Please note, that an electric connection may also be created via the medium to be measured (e.g.
pH-electrodes and conductivity-electrodes in fluids)
+
_
Supply
1
2
3
4
5
+
-
R
elay
+
-
U
in
Semicond.-
relay
+
_
S
upply
1
2
3
4
5
