KROHNE OPTIFLEX 4300C ATEX EN - Manual (Page 12)

3
ELECTRICAL CONNECTIONS
12
OPTIFLEX 4300 C
www.krohne.com 02/2009 - 4000523601 - AD ATEX OPTIFLEX 4300 R01 en
Electrical connections
3.1 General notes
3.2 Terminal compartment
3.2.1 How to open the terminal compartment
• De-energize the circuit.
• After the time given in the table that follows, remove the cover stop 1.
i Use a 3 mm allen wrench.
• Remove the terminal compartment cover 2.
Time necessary to de-energize an Ex d [ia]-approved device
WARNING!
•
De-energize the circuit.
• Use the applicable cable glands for the cable entry openings in the housing (Aluminium
housing: M26 x 1.5, M20 x 1.5, ½NPT or G½; Stainless steel housing: M25 x 1.5, M20 x 1.5,
½
NPT or G½). For the cable entry size, refer to the device nameplate.
• If ambient temperature >60°C / >140°F, use heat-resistant cables and cable glands certified
for continuous operation above 90°C / 194°F.
Figure 3-1: How to open the terminal compartment
1 Cover stop
2 Terminal compartment cover
WARNING!
Do not remove the terminal compartment cover while the electrical power is connected.
Temperature class Time to de-energize the Ex d [ia]-approved device
[minutes]
T6 20
T5 10
T4, T3 Not necessary
AD_ATEX_OPTIFLEX4300_en_090528_4000523601_R01_D5D.book Page 12 Thursday, May 28, 2009 6:00 PM