2015_03_03
10
13
Additional Interfaces and Power Supply
13.1
Connection of additional interfaces and power supply
The following are options that the calculator can be equipped with at the factory (state when ordering) and will
vary depending on the individual calculator.
-
Feed the cable to be connected (cable diameter 3.5 to 6.5 mm) through an opening on the bottom edge of
the calculator housing into the space containing the terminal strips.
-
Loosen a cable gland and glide it over the cable (cable diameter 3.5 to 6.5 mm). Remove the blind plug in
the cable gland opening.
-
Feed the cable of the through the opening into the terminal box.
-
The terminal clamps are designed to fit strands with ends with a cross-section of 0.5 – 1.5 mm
2
.
-
Clamp on the cable according to the following illustrations that apply depending on the interface.
Connection of M-Bus
Connection of pulse
outputs or inputs
Connection of pulse
outputs heat/cooling
Connection of power
pack
Polarity is not important
for these connections so
the wires can be clamped
arbitrarily.
Depending on the option,
there are two additional
pulse inputs
(IN 2 and IN 3) for further
meters or two pulse
outputs (OUT 1 and OUT
2) for connection to an
additional system. For
connection of meters with
open collectors attention
must be paid to the
polarity.
For the dual-purpose
heat/cooling meter
version, separate pulse
outputs for heating
energy (OUT 1) and
cooling energy (OUT 2)
are available.
It is strongly
recommended to use only
the manufacturer`s
original power pack.
It is imperative to pay
attention to the polarity.
-
Check that the connections are tight.
-
Screw the cable glands tight by hand.
13.2
M-Bus (optional)
The M-Bus is a galvanically isolated interface for the transmission of meter data (absolute values).
