TCF Termoventilatori Condizionatori Felsinea Srl
40057 Cadriano di Granarolo Emilia (Bologna), via Giuseppe di Vittorio 5
www.tcf.it
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10.
ATTACHMENT 3
: Characteristics of input/output signals
Attention: all connections not compliant with the specifications may damage the circuit irreversibly. This might redefine the
warranty conditions.
Cables and connections
1.
Control cables
All the connections must be carried out in strict compliance with the wiring diagram indicated in this document. The
connection cables must be shielded, of maximum section 0,5 mm
2
. The mass braid of the cable must be connected to a G
connector of the control box. In order to prevent all interferences, we recommend to separate the cable of all the external
sources of disturbance. Use one of the cables of the following list (or equivalent):
2.
Connecting cables between the power box and the control box
UTP cable / category 5 / 8 threads. Maximum length = 100 m
RJ45 connectors: no particular specification
External contacts K’1 and K’2:
Contacts free from potentials
Mx. impedence : 10 KΩ
12V feed available on output:
Output voltage: 12 Vdc ±2% (between the connector G and 7)
Max. available I: 80 mA
Output signal: ‘feedback’ of the rate
Analogic signal between the connectors G and 8 of the control circuit corresponding to the airflow of the fan
Minimum impedence: 10 MΩ. Tolerance: ±5%
Example: If you measure 2,38V within G and 8 on a DD 9-9 ECMd2, the airflow of the fan is (2900*(2,38/4,65)) m
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h 1485.