22
The EM-PQ 2300 has four digital inputs (for standard S0 pulses as per DIN 43864), which
can be used to read status codes.
The inputs
1
,
2
and
Trigger IN
are available for use as desired,
Trigger IN
also being
designated as input
3
, as it is actually identical with inputs
1
and 2 in terms of its
functionality. The input HT/NT, on the other hand, serves only for tariff switching.
The configuration of inputs
1
-
3
(status code or pulse reception and their assignment to a
variable) is carried out using the FRAKO configuration software Device Manager.
See
Section 2, Technical data, page 7
, and
Section 7.3.1 Digital IN 1/2, page 28
, for the configuration procedure.
CAUTION!
Please pay attention to the following points when connecting the instrument:
- Common earth connection, also electrically connected with the digital inputs, analogue
outputs and temperature input.
- If more than one external earthing connections are made, equalizing currents could flow
through them and cause damage to the EM-PQ 2300 or other devices connected to it.
5.1.9 Temperature IN
The EM-PQ 2300 has one temperature input, to which either a Pt100 or a Pt1000 RTD probe can
be connected. The EM-PQ 2300 automatically identifies the type of probe connected, 2-wire or
4-wire configuration being possible.
If a 2-wire configuration is used, each outer connection must be commoned with the inner
connection next to it.
For technical data see
Section 2, Technical data, page 7
; for configuration see
Section 7.3.2 Temperatur,
page 29
.
CAUTION!
Please pay attention to the following points when connecting the instrument:
- Common earth connection, also electrically connected with the digital inputs, analogue
outputs and temperature input.
- If more than one external earthing connections are made, equalizing currents could flow
through them and cause damage to the EM-PQ 2300 or other devices connected to it.
Note: Temperature measurement is possible from hardware version v1.8 and firmware version v1.72 onwards.
Although the connections are provided in earlier instrument versions, they have no function. If a temperature
probe is connected there, it will not result in any technical faults, but false temperature readings will be output.
5.1.10 Alarm
Alarm signals registered internally in the EM-PQ 2300 can be assigned to the volt-
free contact of the alarm relay. These alarm signals can comprise status codes,
statuses of digital inputs, set alarm limits exceeded or instrument faults.
The assignment of the internal alarm signals to the alarm relay is carried out using
the FRAKO configuration software Device Manager.
For technical data see
Section 2, Technical data, page 7
; for configuration see
Section 7.2.3 Alarm rela, page 28
.
