15
Infrared (IrdA Port)
For data transfer from microCLIMA to the computer, it is necessary to wire an optical head
onto the serial gate of the computer. The optical head and the necessary software are
available upon request as optional. The IrdA port is activated with an appropriate key. After
60 seconds of inactivity, the gate will shut-off automatically.
M-bus
M-Bus interface is available upon demand (optional). When using this system, checking of
the main data and the measurements cannot be altered. The protocol is in compliance with
Standard EN1434-3 and with Standards IEC 870.
Baud: standard: 2400 Bd. It is important to outline the typology M-Bus (length of the wiring
cables, cross sections of the cable) has to correspond to the baud unit of the heat counter.
During the M-Bus communication, it is not possible to use the other communication in-
terfaces of the device (key or IrdA), and vice versa. Note: the heat counters are battery fed,
and that’s the reason why the simultaneous communications are so limited. In a M.-Bus
net of 250 heat counters, for every tester no. 24 demands per day are possible. If a small
number of demands and/or a small number of heat counters are wired to the bus, the un-
used quantity of available demands is stored onto the device.
The life battery of the battery depends on the quantity of data exchanged. Its minimum life
is 6 years.
Output signals
The device is equipped with a signal outlet fed by electronic inputs, to be required when
the PO is submitted.
The contact is type: class A0, according to Normative EN1434, and produces the counting
impulses of the heat counter. The outlet of the impulses closes in relation to the measured
volume of the appliance (see data plate) for a duration of 125 ms. When the impulses
through the outlet are many, the gap time between the impulses is of 125ms. Should the
nominal data and the edge of the contact be taken into consideration, the end user is free
to set-up the data about the impulses in a wide range of options. The contact (fi g. 6) can be
wired by means of a large number of devices, aimed to get the outlet data.
The minimum duration of the battery for the heat counters, equipped with outlet impulses,
is of 6 years plus 1.
Impulses:
– Heat: standard: 1kWh/impulse, or optionals
– Volume: standard: 100 l/impulse
Communication
Technical data
Max. switching current
300 mA (AC/DC)
Max. switching voltage
35 V (AC/DC)
Max. switching power supply
300 mW
Insulating resistance
>
10
9
Ohm
Resistance of contact
max. 25 Ohm
Capacity of contact
max. 1.5 pF
Maximum current
120 mA
Dielectric resistance (open contact)
350 V (AC/DC)
Connect here the device for acquiring the output data
Fig. 6
