Hazardous location installation
[28]
• For the maximum environmental temperature of the EZ 10xx and PR 642x sensors approved
for temperature classes T2, T4, and T6 see
Table 6-5
.
• Install the EZ 1000 according to the control drawing CDG 5800-00182.
• For the maximum environmental temperature of the EZ 1000 approved for temperature
classes T2, T4, and T6 see
Table 6-1
to
Table 6-3
.
• The converter is intended for use with safety barriers as an Ex ia device or without safety
barriers as an Ex nA device. Once used without an safety barrier, it is not permitted to use the
device as an Ex ia device.
6.2 Installation requirements – intrinsic safe
In the following conditions, sensors EZ 105x, EZ 108x, and PR 642x in combination with the
EZ 1000 converter can be used for applications in hazardous areas for Zone 0, protection
class Intrinsic safety – Ex ia IIC T6:
•
Connect the EZ 1000 converter by using safety barriers according to
Section 6.7
.
• All barriers with Zener diodes and safety data within the permitted limits are
approved.
• The characteristic of the safety barriers must be linear.
• Install the safety barriers outside of the explosive area, in cabinets or control cubicles
with protection classes of at least IP 20, according to IEC 60529.
• With appropriate approval, the safety barriers can be installed in Zone 2. In this case,
observe the specifications of the manufacturer.
• To achieve compensation of electric potentials, connect the connectors for the
protective earth to the corresponding protective earth connectors by a
compensation cable within the explosive area.
• Isolate the mounting rail for the safety barriers.
• Within the ATEX-field of application, dimension the compensation cable according
to EN 60079-14 12.2.4 with a minimum copper wire cross section of 2x1.5 mm
2
or
1x4 mm
2
. Outside of the ATEX-field of application, observe the respectively valid
installation instructions.
• Observe the heating within the field housing. Expect a maximum heat dissipation of
840 mW for each EZ 1000 converter.
• Neither P
O1
nor P
O2
may exceed 630 mW.
6.3
Installation requirements – non-sparking
The sensors EZ 105x, EZ 108x, and PR 642x are connected to the EZ 1000 converter with
intrinsically protection class in Zone 2/Division 2 by internal protection of the EZ 1000.
In the following conditions, the sensors EZ 105x, EZ 108x, and PR 642x in combination with
the EZ 1000 converter can be used for applications in hazardous areas for Zone 2/Division
2, protection class Non-sparking – Ex nA:
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