24
Advance Optima Ex Analyzer Modules Operator’s Manual
42/24-12-2 EN
Connect the Power Supply,
continued
Connection to a
Separate Power
Supply
The following configurations are possible:
•
The power supply is installed in an explosion hazard-free area.
•
The 24-VDC connecting cable is attached to an EEx-e connection box. The
connecting cable can be extended to a maximum of 30 meters (3 x 2.5 mm
2
).
•
If an adjustable power supply (available on request) is used, the 24-VDC
connection cable can be extended to a maximum of 90 meters (3 x 2.5 mm
2
).
The max. supply voltage should be 25.8 VDC.
•
The power supply is installed in an explosion hazard area.
In this case a flameproof enclosed power supply is used. The 24-VDC Ex
analyzer module connecting cable should be directly connected to the power
supply.
Connection Box
Like the system bus cable, depending on the distance between the Ex analyzer
module and central unit, the 24-VDC connecting cable should be routed via a
connection box (see the “System Bus Connection” Section, page 21).
24-VDC Extension
Cable
A three-conductor cable with a conductor section
≥
2.5 mm
2
should be used to
extend the 24-VDC connecting cable.
F
The 24 VDC supply voltage should not be activated before the sample gas paths
are purged (see Chapter 3, “Analyzer Module Start-Up” Section, page 26).
