SENSITRON
A Halma Company
MT2276E
GALILEO 32
Manual (EN)
P. 5/14
2. Installation
2.1
CONTROL UNIT
Installation cabinet: IP20 minimum.
Devices installed in zone that have been classified and connected to control unit
shall be protected with one of the types of protection listed in EN 60079-0, corre-
sponding to their own category.
Analogue 4-20 mA detectors to be connected shall comply with the following in-
terface specification:
-
Signals < 3 mA will be interpreted as fault low.
-
Signals between 3 mA and 4 mA will be indicated as negative signal.
-
Signals between 20 mA and 21 mA will be indicated as signal above the
measuring
range.
-
Signals > 21 mA will be interpreted as fault high.
Digital RS 485 detectors to be connected shall comply with the high security
data transmission protocol SIL3.
Have the control unit mounted by using the three mounting holes on the back
part of the cabinet.
Connect the three core mains supply cable to the power supply terminals (1.5
mm
2
per core minimum) and have it secured with the appropriate cable grip.
Connect the Power supply and the RS485 line for the detectors to the terminal
block before powering up the control panel.
After powering up the control panel, connect the red and black power supply ca-
bles fitted with Faston connectors to the 2 x sealed lead acid batteries (12 Vdc / 7
Ah max.). The battery should be carefully fitted inside the space at the left side of
the cabinet.
Figure 2.1
a) Control panel cabinet
