KROHNE OPTIWAVE 7300 IECEx - Manual (Page 12)

3
ELECTRICAL CONNECTIONS
12
OPTIWAVE 7300 C
www.krohne.com 10/2010 - 4000176502 - AD IECEX OPTIWAVE7300 R02 en
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]- or Ex tD[iaD]-approved device
WARNING!
• De-energize the circuit.
• Use the applicable cable glands for the cable entry openings in the housing (M20×1.5 or
½
NPT). For the cable entry size, refer to the device nameplate.
• If ambient temperature >70 ° C / >158 ° F, use heat-resistant cables, cable glands and cable
entry plugs certified for continuous operation above +80
°
C / +176
°
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]- or Ex tD[iaD]-
approved device
[minutes]
T6 20
T5 10
T4, T3 Not necessary