Apator ELF User Manual

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Pulse input (dry contact, NO, open collector, open drain)
Maximum voltage V 6
Maximum current mA 0,05
Wire insulation voltage rating V > 500
Maximum wire length m 10
Maximum no. of inputs qty 4 (2)
Max frequency of input pulse Hz 0,5
Input pulse duration ms 625
Input pulse interval ms 625
Maximum cross section of supply wires mm² < 1,5
Reel relay make input impedance kΩ < 10
Reel relay break input impedance MΩ > 3
Pulse output (optical coupler) - optional
Maximum voltage V 24
Maximum current mA 10
Voltage drop across optical coupler at I
max
V 1
Wire insulation voltage rating V > 500
Maximum wire length in network m 10
Max frequency Hz 64
Minimum pulse duration ms 7,8
Minimum pulse interval ms 7,8
Maximum cross section of supply wires mm² < 1,5
*
)
the length can be much shorter under high ambient interferences
7.1.3. Operating principle of the M-Bus communication interface
Once installed, the interface of the resolver requires no further configuration settings. Install the inter-
faces on the heat meter before supplying power to the M-Bus network; then the communication with
connected heat meters is enabled.
The actual data transmitted over M-Bus are buffered in the interface. The actual data is read from the
heat meter when the interface is installed on the device and the M-Bus network power is on, which in
the operating mode is ~1 minute after the last poll. When the configuration is read/written, the commu-
nication is direct with the heat meter.
7.1.4. Pulse output configuration
You can configure six operating states of the pulse output:
• basic state: output inactive;
• pulse per revolution of the flow sensor rotor;
• test mote: the pulse value is directly proportional to the volume measured by the flow transducer and
the pulse constant depends on the flow sensor;
• heat-proportional output – available settings (see the table below):
• one pulse is a 0.1 increment of the lowest possible heat value displayed on the LCD;
• one pulse is the increment by the lowest possible heat value displayed on the LCD;
• one pulse is 10 times the lowest possible heat value displayed on the LCD.

Apator ELF Specifications

General

Brand	Apator
Model	ELF
Category	Measuring Instruments
Language	English