2
EN
Operating instructions
Belt alignment switches, position switches
EX-T. 454
1.7 Exclusion of liability
We shall accept no liability for damages and malfunctions resulting from
defective mounting or failure to comply with this operating instructions
manual. The manufacturer shall accept no liability for damages
resulting from the use of unauthorised spare parts or accessories.
For safety reasons, invasive work on the device as well as arbitrary
repairs, conversions and modifications to the device are strictly
forbidden; the manufacturer shall accept no liability for damages
resulting from such invasive work, arbitrary repairs, conversions and/or
modifications to the device.
2. Product description
2.1 Ordering code
This operating instructions manual applies to the following types:
EX-T. 454-
➀
Z-
➁
-
➂
-
➃
No. Option Description
➀
11
1 NO / 1 NC
02
2 NC
20
2 NO
22
2 NO / 2 NC
13
1 NO / 3 NC
31
3 NO / 1 NC
04
4 NC contacts
➁
Standard (11, 02, 20)
H
Staggered contacts (22, 13, 31, 04)
➂
Standard
DN
Dupline
®
input module (only Zone 21 and 22)
➃
Standard (smooth shaft)
1801
Toothed shaft (10° increments)
Levers must be ordered separately.
Only if the information described in this operating instructions
manual are realised correctly, the compliance with the
Explosion Protection Directive is maintained.
2.2 Special versions
For special versions, which are not listed in the order code below 2.1,
these specifications apply accordingly, provided that they correspond to
the standard version.
2.3 Purpose
The belt alignment switch is suitable for use on material handling
equipment. The belt alignment switch is actuated, when the conveyor
belt becomes misaligned.
Position switches are used wherever moving parts on machinery and
plants need to be positioned, controlled and monitored.
The components can be used in explosion-endangered areas of Zone
21 and 22 equipment category 2D and 3D. The EX-T. 454 version
without Dupline® input module can also be installed in potentially
explosive gas atmospheres of zones 1 and 2, category 2G and 3G,
when the intrinsic safety Ex ib ignition protection type is used.
The EX-T. 454-... version with integrated Dupline
®
input
module is only suitable for use in potentially explosive dust
atmospheres of zones 21 and 22, category 2D and 3D.
The installation and maintenance requirements to the standard series
EN 60079 must be met.
During installation, it must be borne in mind that the device may only
be connected to a single, approved and intrinsically safe apparatus
(e.g. SRB 200EXi-..., barrier, isolated switch amplifier).
Note external sources of heat and/or cold. The switch may only be
operated in the temperature range specified in the datasheet. External
influences, e.g. solar radiation, external sources of cold, must be borne
in mind and precautionary measures taken, if applicable.
Cable glands and locking screws must also be suitable for
potentially explosive areas.
Cable glands and locking screws are not included in the
delivery. Appropriate accessories can be found in the
Schmersal catalogues or in the online catalogue on the
Internet: www.schmersal.net.
2.4 Technical data
Designation in accordance with the ATEX directives:
- Version without Dupline
®
-DN:
L
II 2GD
- Version with Dupline
®
-DN:
L
II 2D
Designation in accordance with standards:
- Version without Dupline
®
-DN:
Ex ib IIC T6 Gb
Ex tb IIIC T80°C Db
- Version with Dupline
®
-DN:
Ex tb IIIC T80°C Db
Applied standards:
IEC 60947-5-1, EN 60079-0,
EN 60079-11, EN 60079-31,
Certificate numbers:
- EU-type examination certificate:
TÜV 17 ATEX 8004
- IECEx:
TUR 18.0048
Enclosure:
Grey cast iron, galvanized and painted
Max. impact energy:
7 J
Max. surface temperature:
+80 °C
Protection class:
IP66 and IP67 to IEC 60529
Ambient temperature:
−20 °C … +60 °C
Storage temperature:
−20 °C … +60 °C
Contact material:
Silver
Contact type:
Slow action, positive break NC contact A;
double break of 2 separated contact bridges
Connection:
Screw terminals M4
Max. cable section:
0.75 ... 2.5 mm²
(incl. conductor ferrules)
Cable entry:
2 x M20 x 1.5
Mechanical life:
1 million operations
Switching frequency:
max. 1,800/h
Ex cable gland:
L
II 2GD
Cable cross-section:
min. Ø 7 mm; max. Ø 12 mm
Tightening torque:
Screwed cable gland: 8 Nm
Locking screws: 8 Nm
Cover screws: 1 Nm
Earth screws: PE 1 Nm
PA: 1.2 Nm
Electrical data
Rated impulse withstand voltage U
imp
:
6 kV
Rated insulation voltage U
i
:
400 V
Thermal test current I
the
:
10 A
Utilisation category:
AC-15, DC-13
Rated operating current/voltage I
e
/U
e
:
4 A / 230 VAC;1 A / 24 VDC
Max. fuse rating:
6 A gG D-fuse
Required short-circuit current:
1,000 A
Electrical data – Dupline
®
(see also the operating instructions for the Dupline
®
input module)
Supply voltage:
8.2 VDC
Power consumption:
100 μA
Device insulation:
internal short-circuit proof
Rated impulse withstand voltage U
imp
:
800 V
Rated insulation voltage U
i
:
30 VDC
Connection:
screw terminals
Cable section:
0.25 … 2.5 mm²
Safety-technical data – Intrinsic safety
Voltage U
i
:
60 V
Current I
i
:
100 mA
Power P
i
:
6 W
Capacity C
i
0
Inductivity L
i
0
