17
6.4.3 Test LED
Any configured transformer factors have no affect on the test LED.
The LED constant (R
L
) depends on the model and is always secondary.
6.5 Interfaces
6.5.1 M-Bus interface
The M-Bus interface is designed according to DIN EN 13757-2, -3. The following
parameters can be transmitted via the M-Bus:
-
Manufacturer ID, optional/freely selectable
-
Medium
-
Primary and secondary address of M-Bus
-
Energy values
-
Instantaneous
value
P
Sum
-
Error
status
Additional functions and details are described in the M-Bus description for the DHZ.
This data is output as a standard response and can be displayed by conventional tools
such as NZR-VADEV. Other parameters, such as the meter configuration or the editing
data, can only be read via manufacturer-specific M-Bus telegrams, such as those
supported by the NZR M-Tool.
6.5.2 LON interface
The LON interface is designed according to DIN EN 14908-1, -2, -3, -4 and is based on
the "LONMARK" specification, so that all LON modules can be combined in any
environment. Each LON module has a worldwide unique address (Neuron ID). This
address is defined at the time of manufacture and is printed on the rating plate of the
meter. The DHZ-LON-Bus supports free network topologies.
The following data can be retrieved via the LON interface:
-
Energy
values
-
Instantaneous values: P
Sum
, single phases of P, U and I
-
Error
status
-
U and I transformer factors (changes are possible only in non-calibrated units with
active edit mode).
Additional functions and details are described in the LON description for the DHZ.
The LON interface, which is galvanically separated from the meter, is located on the
additional terminals 14 and 16.
