Owner's manual

4 Commissioning - ATEX
BU 0240 GB 27
4.2.1 Modified SK 2x5E for compliance with Category 3D
For the operation of an SK 2x5E in ATEX Zone 22 only a modified frequency inverter is permissible. This
adaptation is only made at the NORD factory. In order to use the frequency inverter for ATEX Zone 22, the
standard cable gland plugs must be replaced by ATEX-approved brass plugs. Also, in addition to modified
seals, the clear plastic diagnostic plugs are replaced by aluminium/glass versions. The housing cover is also
coated with a UV-resistant paint.
II 3D Ex tD A22 IP55 T125 °C X
Categorisation:
 Protection with "housing"
 Procedure "A" Zone "22" Category 3D
 Protection class IP55 / IP66 (according to the device)
 Maximum surface temperature 125°C
 Ambient temperature -20°C to +40°C
Series SK 2x5E frequency inverters and the associated options are only designed for a
degree of mechanical hazard corresponding to a low impact energy of 4J.
The frequency inverter must not be exposed to direct sunlight.
The necessary adaptations are contained in the ATEX outdoor installation kits.
4.2.2 Options for ATEX Zone 22 3D
In order to ensure an ATEX-compliant NORDAC SK 2x5E frequency inverter, the approval of optional
modules for explosion hazard areas must be observed. The following lists the various options with regard to
their approval for use in ATEX Zone 22 3D.
4.2.2.1 Technology Units for ATEX Zone 22 3D
Name Part Number
Approved for
ATEX Zone 22 3D
Not approved for
ATEX Zone 22 3D
SK TI4-TU-BUS(-C) 275280000 / (275280500)
x
SK TI4-TU-NET(-C) 275280100 / (275280600)
x
SK TU4-PBR(-C) 275281100 / (275281150)
x
SK TU4-CAO(-C) 275281101 / (275281151)
x
SK TU4-DEV(-C) 275281102 / (275281152)
x
SK TU4-IOE(-C) 275281106 / (275281156)
x
SK TU4-24V-123-B(-C) 275281108 / (275281158)
x
SK TU4-24V-140-B(-C) 275281109 / (275281159)
x
Device Kit designation Part Number
SK 200E SI … III SK 200E-ATEX-BGI 275274200
SK TU4-xxx SK 200E-ATEX-TU4 275274206