ENGLISH
37
Figure 3: Connections
5.5
Electrical Connections of Inputs and Outputs
The MCE-22/C has 3 digital inputs, 2 NTC inputs for fluid temperature measurement T and T1 an analogue input and 2 digital outputs
so as to be able to make certain interfaces with more complex installations.
Shown in
Figure 4, Figure 5
and
Figure 6
for example, are some possible configurations of the inputs and outputs.
For the installer it will be sufficient to wire up the desired input and output contacts and to configure their functions as desired (see par.
5.5.1 par. 5.5.2 and par. 5.5.4)
5.5.1
Digital Inputs
The digital inputs are screen-printed at the base of the 18-pole terminal board:
-
I1: Terminals 16 and 17
-
I2: Terminals 15 and 16
-
I3: Terminals 13 and 14
-
I4: Terminals 12 and 13
The inputs may be powered with either direct or alternating current. Shown below are the electrical characteristics of the inputs (see
Table 4
)
Electrical characteristics of the inputs
DC inputs [V]
AC inputs [Vrms]
Minimum switch-on voltage [V]
8
6
Maximum switch-off voltage [V]
2
1.5
Maximum admissible voltage [V]
36
36
Current absorbed at 12V [mA]
3.3
3.3
Max. accepted cable section [mm²]
2.13
N.B. The inputs can be controlled with any polarity (positive or negative with respect to their earth connection)
Table 4: Electrical characteristics of the inputs
The example proposed in
Figure 4
refers to the connection with a dry contact using the internal voltage to control the inputs.
ATTENTION
: The voltage supplied between terminals 11 and 18 of J5 (18-pole terminal board) is
19 Vdc
and may distribute maximum
50 mA
.
If you have a voltage instead of a contact, it can still be used to control the inputs: it will be sufficient
not
to use the terV and
GND and to connect the source of voltage to the desired input, respecting the characteristics described in
Table 4.
ATTENTION: The pairs of inputs I1/I2 and I3/I4 have one pole in common for each pair.
