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8024250/18HT/V2-0/2020-12| SICK
O P E R A T I N G I N S T R U C T I O N S | ZIRKOR200 Ex-G
Subject to change without notice
4
LAYOUT AND FUNCTION
Observe the following points during installation of the cable inlets:
●
Only use cable inlets certified for the application.
●
Only use cable inlets with sufficient temperature range for the application.
●
Ensure that the degree of protection is not affected by the cable inlets or the sealing
plugs.
Cables
Use cables with a temperature stability of minimum 92 °C for ambient temperatures of
>60 °C.
The connection cable to the Ex-d terminal compartment must be laid firmly and in such a
way that it is adequately protected against damage. Lay the connection cable according to
IEC 60079-14.
The connection cables, cable inlets and screw plugs or pipe sealing devices must be
suitable for the lowest ambient temperature.
4.7.2
Ignition source monitoring of the analyzer unit by means of temperature monitoring
The temperature of the analyzer unit is monitored by an additional electronic system (Part
No. 2105158) with two thermoelements. The electronics are designed to be fail-safe
(redundant). These automatically switch off the analyzer unit heating when the operating
temperature of the analyzer unit is exceeded. The switch-off temperature is 810 °C. In
addition, the heating is switched off in the event of a fault in one of the thermoelements.
The electronics go into self-holding mode, which means that if a fault occurs, the
electronics must be reset. The printed circuit board must be checked every three years by
the manufacturer for safe operation. The next test date is on the sticker on the printed
circuit board.
Fig. 8: Sticker with test date
4.7.3
Ignition protection types on solenoid valves
Solenoid valve of the analyzer unit / pneumatic unit valve
ATEX
II 2G Ex eb mb IIC T4 Gb
IECEx
Ex eb mb IIC T4 Gb
