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6.3 Inputs
The dual-tariff model of the DHZ is equipped with one control input (system voltage) for
switching tariffs.
Specifications
System voltage
58...230 V AC (Standard)
Table 5: Specifications of inputs
6.4 Outputs
The DHZ is equipped with a potential-free S0 impulse output (according to DIN 43 864)
or potential-free MOSFET impulse output (solid-state relay). The MOSFET outputs can
be designed as openers or closers.
Specifications
Opto-MOSFET
max. 250V AC/DC, 100 mA (Standard)
S0
max. 27 V DC, 27 mA (passive)
Table 6: Specifications of outputs
6.4.1 Secondary impulse output
Any configured transformer factors have no affect on the impulse output.
The impulse duration is 30, 50 or 100 ms depending on the model.
The energy impulses (R
A
) are 10, 100, 200, 500, 1 000, 2 000, 5 000, 10 000, 20 000,
50 000, 100 000 or 200 000 Imp./kWh depending on the model and are always
secondary.
6.4.2 Primary impulse output
Configured transformer factors affect the impulse output.
The impulse duration is 500 ms and the impulse value is set at 1 Imp./kWh.
Note:
For a meter with a configured primary impulse output, the function of the impulse output
not only depends on the instantaneous power, but also on the configured overall
transformer factors. The transformer factors must be set by the user to ensure a
sufficient impulse pause at maximum load. The impulse duration is set to 500 ms and
cannot be changed.
Example:
Meter connection type: 4-wire
U
Nom
= 3x230/400 V
I
Max
= 5 A
Output impulse value: 1 Imp./kWh with 500 ms impulse duration
Total transformer factors = U factor x I factor = e.g. 1000
P
Max
= U
Nom
x 15% x I
Max
P
Max
= 3x230 V x 1.15 x 5 A = 3.968 kWh
Impulse frequency = impulse value x transformer factor / 3600 s
Impulse frequency = 3.968 kWh x 1 Imp./kWh x 1000 / 3600 s
Impulse frequency = 1.102 Hz => one impulse very 907 ms
With a fixed impulse duration of 500 ms the impulse pause is 407 ms
(907 ms – 500 ms).
