Page 7 of 30
3.4 CONNECTING THE PRESSURE UNIT TO THE POWER SUPPLY
x
Check to ensure that all connections are free from electricity.
x
Always disconnect the electrical power supply cable before working on electrical
or mechanical parts in the pressure unit.
x
After disconnecting the power supply, wait until the led LINE goes off
(approximately 2 minutes) so that the capacitors can unload, before working on
the CPS.
x
Perform the electrical connections in compliance with local standards in force.
x
The installer is responsible for checking that the electrical power supply system is
equipped with an efficient earthing system in accordance with current regulations.
-
RS-485
Æ
Communication port
-
INI
Æ
INIBIT input: NC external contact or NO
for the START/STOP command
-
S.P.
Æ
External Set Point (EST) command: NA
contact
-
NTC
Æ
NTC sensor input to control temperature
-
TRASD.
Æ
Input 0÷5 Volts for pressure transducer
x
+
Æ
Positive
x
-
Æ
Negative
x
D
Æ
Signal
7 - GB -
34
