Digital Signal Types; Functions For Digital Input Signals - INTEGRA Metering CALEC energy master Installation And Operating Instructions Manual

22.4.4 Digital signal types

Most signal transmitters can be used with the signal types IB... IE and PFM:
Transmitter types
Potential free contact, Reed
Open collector up to 200 Hz
Open collector up to 10 kHz
NAMUR up to 200 Hz
NAMUR up to 10 kHz
Kamstrup 'slow'
PFM
For the above-cited signal types, the input signals must meet the following requirements:
Pulse input characteristic
Supply voltage
Input resistance
Low/high level
Pulse length (typical)
Min. pulse frequency
Max. pulse frequency
Transmitter classes (EN1434)

22.4.5 Functions for digital input signals

The following functions can be selected for the signals in the digital group (see table above). Other
functions are also available under the Special setting option.
Function
Status
Pulse
Frequency
Digital signal 'status' function
The status function evaluates the status of a digital signal. This allows evaluating the direction signal
of a flow sensor (flow reversal), for example, or the switching of a tariff.
Input 2
...
Signal IB Imp. 5Hz
Funct. Status
MeaVar. Norm.closed
Status Open
...
®
CALEC energy master installation and operating instructions
IB IC
possible
+
IB IC
6 V 6 V
100 kOhm 100 kOhm
1.5 / 2.1 V 1.5 / 2.1 V
≥ 100 ms ≥ 2 ms
0.003 Hz 0.003 Hz
5 Hz 200 Hz
OC (OA) OC, OD
Application
Status signal
Pulse signal
Frequency signal
Effect
Status at input
ID (Namur)
+
+
+
ID (Namur)
8 V
1 kOhm
1.5 / 2.1 mA
≥ 2 ms
0.003 Hz
200 Hz
OA, OB
Comment
e.g. flow direction signal, tariff switching etc.
e.g. volume pulses
e.g. flow-rate proportional frequency signals (not pos-
sible with signal "IB Imp." 5Hz )
Select an input with the
Signal type: Class IB pulse 5Hz acc. to EN 1434
Set to status input
Norm closed: Contact closed, if status 'on'
Norm open: Contact opened, if status 'on'
In the example, the contact is open, so status 'off'
IE PFM
+
+
+
IE PFM
8 V 24V
1 kOhm 150 Ohm
1.5 / 2.1 mA 9 / 14mA
≥ 0.04 ms ≥ 0.04 ms
0.003 Hz 0.003 Hz
12.5 kHz 12.5 kHz
OB PFM
keys
59