20/62 Device handbook SINEAX AM2000, 173 849, 04/2015
Usage as digital output
► Alarm output
► State reporting
► Pulse output to an external counter (acc. EN62053-31)
1)
Recommended if input
impedance
of counter > 100 kΩ
Driving a counter mechanism
The width of the energy pulses can be selected, but
have to be adapted to the counter mechanism.
Electro mechanical meters
typically need a pulse
width of 50...100ms.
Electronic meters
are partly capable to detect pulses
in the kHz range. There are the types NPN (active
negative edge) and PNP (active positive edge). For
the AM2000 a PNP type is required. The pulse width
has to be at least 30ms (acc. EN62053-31). The delay
between to pulses corresponds at least to the pulse
width. The smaller the pulse width, the higher the
sensitivity to disturbances.
Driving a relay
Rated current
50 mA (60 mA max.)
Switching frequency (S0)
≤ 20 Hz
Leakage current
0,01 mA
Voltage drop
< 3 V
Load capacity
400
Ω … 1 MΩ
5.8 Analog outputs
Analog outputs are available for devices with corresponding I/O extensions only. See nameplate.
Connection to an analog input card of a PLC or a
control system
The AM2000 is an isolated measurement device. The
particular outputs are not galvanically isolated. To
reduce the influence of disturbances shielded a
twisted-pair cables should be used. The shield should
be connected to earth on both opposite ends. If there
a potential differences between the ends of the cable
the shield should be earthed on one side only to
prevent from equalizing currents.
Under all circumstances consider as well appropriate
remarks in the instruction manual of the system to
connect.
