2
Operating instructions
Position switches
EX-T 335
EN
1.6 Warning about misuse
In case of inadequate or improper use or manipulations of
the component, personal hazards or damage to machinery
or plant components cannot be excluded. The relevant
requirements of the standard ISO 14119 must be observed.
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
➀
335-
➁
Y
➂
-
➃
-
➄
No. Option
Description
➀
Actuator selection, refer to catalogue
➁
11
1 NO / 1 NC
02
2 NC
20
2 NO
➂
UE
With overlapping contacts
with staggered contacts
➃
2138
Roller lever 7H for safety applications
➄
RMS
Brass actuating roller
In accordance with the Machinery Directive, the type
plate of safety components is type plate is labelled "safety
component".
Only if the information described in this operating instructions
manual are realised correctly, the safety function and
therefore the compliance with the Machinery Directive and
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 position switches are suitable for sliding and hinged guards, which
need to be closed in order to ensure the required operational safety.
The components can be used in explosion-endangered areas of Zone
1 and 21 equipment category 2GD. The installation and maintenance
requirements to the standard series EN IEC 60079
(ABNT NBR IEC 60079) must be met.
The user must evaluate and design the safety chain in ac-
cordance with the relevant standards and the required safety
level.
The entire concept of the control system, in which the safety
component is integrated, must be validated to the relevant
standards.
The safety-technical data and features according to the
applicable test certificate (or possible other approvals) are
mentioned in the technical data.
2.4 Technical data
Designation in accordance with the ATEX Directive:
L
II 2GD
Designation in accordance with the standards:
Ex db eb IIC T6 Gb
Ex tb IIIC T80°C Db
Applied standards:
EN 60947-5-1, EN 60079-0,
EN 60079-1, EN IEC 60079-7, EN 60079-31,
ABNT NBR IEC 60079-0, ABNT NBR IEC 60079-1,
ABNT NBR IEC 60079-7, ABNT NBR IEC 60079-31
Certificate numbers:
- EU-prototype test certificate:
BVS 09 ATEX E 152
- IECEx:
BVS 10.0040
- INMETRO:
DNV 14.0041
Enclosure:
zinc die-cast, paint finish
Design:
EN 50041
Design according to ISO 14119:
1
Max. impact energy:
7 J
Actuating speed:
max. 1 m/s
Protection class:
IP65
Contact material:
Silver
Contact type:
change-over with double break Zb,
or 2 NC contacts, galvanically separated contact bridges
Switching system:
A
EN 60947-5-1, slow action,
NC contact with positive break
Connection:
screw terminals
Max. cable section:
1 mm² … 2.5 mm²
(incl. conductor ferrules)
Cable entry:
M20
Rated impulse withstand voltage U
imp
:
4 kV
Rated insulation voltage U
i
:
250 V
Thermal test current I
the
:
5 A
Utilisation category:
AC-1, AC-15, DC-13
Max. fuse rating:
6 A gG D-fuse
Required short-circuit current:
1,000 A
Ambient temperature:
- cable section 2.5 mm²
–20 °C … +55 °C
- cable section 1 mm²
–20 °C … +50 °C
Mechanical life:
1 million operations
Max. switching frequency:
1,800/h
Bounce duration:
Slow action: < 3 ms
Switchover time:
in accordance with actuating speed
Cable cross-section of the cable glands:
min. Ø 7 mm;
max. Ø 12 mm
Cable glands:
L
II 2GD
(1,21 ABNT NBR IEC 60079)
Tightening torque:
- Cover screws:
min. 1.4 Nm
- Head screws:
min. 1.5 Nm
- Screwed cable gland/Cap nut:
10 Nm
- Earth screw:
min. 1 Nm
Maximum ambient temperature: 55°C.
The power-source has to be an isolated limited voltage/limited
current protected by maximum 30Vdc, 4A (42.4Vdc peak).
2.5 Safety classification
Standards:
ISO 13849-1
B
10D
(NC contact):
20.000.000
B
10D
(NO contact) at 10% ohmic contact load:
1,000,000
Service life:
20 years
MTTF
B
d x
x
h
s/h
3600
D
10D
op
op
op
n
0,1 x n
op
t
cycle
(Specifications can vary depending on the application-specific
parameters h
op
, d
op
, t
cycle
as well as the load.)
