Computec
CDD6
EN
CDD6: user manual – rev.07
Page 24/74
4.2
Connections
4.2.1
MLC signals connection
The present paragraph reports the connections between door drive and MLC, focusing the attention on the
connection for the common voltage to use, in case it is the common voltage from CDD (24_DD) or from
MLC (24_EC).
Common voltage from CDD has maximum load limit current of 1A.
Common Voltage
Connection
Notes
Internal
24V_DD
The 37-38 bridge must be present.
The MLC uses the 24Vdc from the door drive as
common voltage for commands and door drive
outputs.
Commands: DOC, DCC, RSC, FFC. As example only the
first two are reported in the diagram: the others follow
the same connection rules.
The door drive outputs, being dry contacts, can be
connected to another common voltage, if requested by
the MLC.
The door drive outputs have a dedicated common
voltage available for each output.
In the diagram they have been grouped in a single pin,
that represents a series of bridges between X2.4,
X2.16, X2.18, X2.35
External
24V_EC
Remove the 37-38 bridge and connect the external 0V
from MLC to the 38 pin.
Commands: DOC, DCC, RSC, FFC. As example only the
first two are reported in the diagram: the others
follows the same connection rules.
If local wired contacts are present:
1. use the same common voltage active for the
commands.
2. use the auxiliary 24Vdc of the door drive, recovering
the 37-38 bridges. In this case check the compatibility
between 0V_DD and 0V_EC.
The door drive outputs keep the same common voltage
from MLC, used for the commands.
The door drive outputs have a dedicated common
voltage available for each output.
In the diagram they have been grouped in a single pin,
that represents a series of bridges between X2.4,
X2.16, X2.18, X2.35
- Table 13: I/O signals connections vs MLC -
Q.M.
(E.C.)
CDD6
X2.1 (RVS N.C.)
X2.17 (DOS)
X2.19 (DCS)
X2.34 (AUXS N.C.)
X2.4 X2.16
X2.18 X2.35
X3.1.15 (+24V)
X3.2.38 (0V IN)
X3.2.37 (0V DD)
X3.1.5 (DOC)
X3.1.3 (DCC)
Q.M.
(E.C.)
CDD6
0V EC
X2.1 (RVS N.C.)
X2.17 (DOS)
X2.19 (DCS)
X2.34 (AUXS N.C.)
X2.4 X2.16
X2.18 X2.35
X3.1.15 (+24V)
X3.2.38 (0V IN)
X3.2.37 (0V DD)
X3.1.5 (DOC)
X3.1.3 (DCC)
24V EC