janitza UMG 806, User Manual And Technical Data

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UMG 806 www.janitza.com
7.9 Digital output
The device has 1 digital output, which
· Is electrically isolated from the evaluation elec-
tronics via an optocoupler.
· Is not short-circuit proof.
· Is used as a pulse output to count the energy
consumption.
· Can switch direct and alternating current loads
via relays or semiconductor electronics
Pulse constant
The device delivers 5000 pulses per secondary
kWh, i.e. the transformer ratios are not taken into
account. The energy value actually consumed
(primary side) in relation to the time period must be
scaled using the transformer ratios of the trans-
formers.
Number of pulses
I
P
/I
S
: Current transformer ratio
(primary to secondary current)
U
P
/U
S
: Voltage transformer ratio
(primary to secondary voltage)
+
Fig.: Connection example for digital output
-
5
6
VCC
GND
UMG 806
Fig.: Schematic diagram of digital output
ATTENTION
Transmission error and material damage due to
electrical malfunction.
With a cable length of more than 30 m, there is an
increased probability of transmission errors and
damage to the device due to atmospheric dis-
charge!
Use shielded cables for the connections to the
digital inputs and outputs!
ATTENTION
Connection errors can damage the device and
cause material damage.
The digital outputs are not short-circuit proof! Con-
nection errors can therefore lead to damage to the
connections.
Make sure that the wiring is correct when con-
necting the outputs.