SMY133-SMY134-SMP133 Operating Manual
6.2.1.2 Alarm Light (A)
Alarm lights A1, A2 can be set in the same way as digital outputs (see above) and used for indication
of various events on the instrument display.
6.2.1.3 Pulse Output (PO)
Any of digital outputs or alarm lights can be set as transmitting electricity meter. The frequency of
generated impulses can be set depending on values of measured electric energy by the embedded
electricity meter unit.
You can set to impulse output mode not only the
I
-type (solid-state) outputs, but the
R
-type
(electromechanical relay) outputs too. But note lifetime of electromechanical relays, they
have limited number of switching operations.
For pulse output following parameters must be set :
•
target
digital output
•
target energy quantity … the transmitted energy must be chosen here (see the electricity
meter description for the energies explanation)
•
number of
pulses per kWh/kvarh/kVAh
Fig. 6.4: I/O Setup – Pulse Output Action Properties
You can set one of alarm lights (A1, A2) as pulse output too and then you can check the
pulse function on the instrument display simultaneously.
6.2.1.4 Pulse Switch
The pulse switch action is designed to control switches or contactors that require two signals : one for
switch-on and the second for switch-off.
Select digital outputs for switch-on and for switch-off and set the switching pulse width. Next add a
condition for the pulse switch action.
Fig. 6.5: I/O Setup – Pulse Switch
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