UMG 96-PA
www.janitza.de
30
9.
Digital inputs and outputs
9. 1
Digital inputs
The UMG96-PA has three digital inputs to
each of which you can connect one signal
transducer. When a signal is present, the
corresponding LED lights up green.
An input signal is detected on a digital input if
• a voltage of at least 18 V and maximum 28
V DC (typically at 4 mA) is applied.
• a current of at least 1 mA and maximum 6
mA flows.
c
CAUTION!
Transmission errors
and material damage
result from electrical
interference.
For wiring over 30 m, there is an increased
probability of transmission errors and
damage to the device from atmospheric
discharge.
Use screened wiring for connections to
the digital inputs and outputs.
C
ATTENTION!
Note the correct polarity of the sup-
ply voltage.
The device has
• 3 digital inputs and
• 3 digital outputs.
-
+
Fig. Connection of digital inputs
Fig. Example for the connection of external switch
contacts S1-S3 to digital inputs 1, 2 and 3.
17
18
19
20
2k21
2k21
2k21
2k21
2k21
2k21
Digital
Input 1
Digital
Input 2
Digital
Input 3
-
+
24V DC
S1
S2
External
auxiliary voltage
UMG 96-PA
Digital inputs 1-3
S3
LED
LED
LED
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