5.5 Additional electric connections
the units must be earthed.
The units are wired internally from factory.
To connect the the CTRL-DSP to the motherboard use a 4 poles twisted-pair cable: 30m max length.
Figures below show the wiring diagram.
inputs/commands
N°1 AC supply connector.
N°3 on/off inputs (volt-free contacts), N°1 for ambient sensors (named IAQ), N°1 for boost momentary switch (named BST) and
N°1 for remote ON/OFF enable (named HY/S1).
N°1 1-10V analog input (named SLAVE).
N°1 4-pole connector for CTRL-DSP (RS485 plus 12Vdc supply).
outputs
N°1 on/off output for pre-heating/post-heating (relay contact – 250Vac 5A).
fig. 5.q
Electrical connections on the motherboard fitted in the terminal box.
WARninG
Make sure that the mains supply to the unit is disconnected before performing any installation, service, maintenance or
electrical work!
WARninG
The installation and service of the unit and complete ventilation system must be performed by an authorized installer and in
accordance with local rules and regulations.
CTRL-DSP
N
L
-
S4
-
+
+
SLA
1-10V
HEAT/CD
+12V
A
B
GND
SLAVE input
1-10V
AC power supply
Heat output
(MAX 250Vac 5A)
Boost momentary
switch (BST)
IAQ Input
(Air Quality i.e. SEN-HY)
HY/S1 Input
(for remote
ON/OFF enable)
BST
IAQ
HY/S1
DO NOT REMOVE
(see § 7.3 Remote enable)
Summary of Contents for QR280A
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