2
Operating instructions
Safety switch
EX-AZ 415
EN
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-AZ 415-
➀
ZPK-
➁
-3D
No. Option Description
➀
S1
S2
11 / 11 1 NO Contact 1 NC contact 1 NO Contact 1 NC contact
02 / 11 2 NC
1 NO Contact 1 NC contact
02 / 20 2 NC
2 NO
02 / 02 2 NC
2 NC
➁
1637
Gold-plated contacts
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 safety switch has been designed to prevent, in conjunction with the
control part of a machine, movable safety guards from being opened
before hazardous conditions have been eliminated.
The safety switchgears are classified according to ISO 14119
as type 2 interlocking devices.
The components can be used in explosion-endangered areas of Zone
22 equipment category 3D. Installation and maintenance requirements
to the standard series EN 60079 must be met.
The user must evaluate and design the safety chain in
accordance 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.
Conditions for safe operation
Due to their specific impact energy, the components must be fitted
with a protection against mechanical stresses. The specific ambient
temperature range must be observed.
2.4 Technical data
Equipment category:
L
II 3D
Ex protection:
Ex tc IIIC T60°C Dc X
Standards:
IEC 60947-5-1, EN 60079-0,
EN 60079-31, BG-GS-ET-15
Enclosure:
light-alloy diecast, paint finish
Actuator:
zinc-plated brass / aluminium
Max. impact energy:
4 J
Actuating speed:
max. 1 m/s
Protection class:
IP67 to IEC 60529
Contact material:
Silver
Coding level according to ISO 14119:
low
Contact type:
change-over with double break Zb,
or 2 NC contacts, galvanically separated contact bridges
Switching system:
A
IEC 60947-5-1; slow action,
NC contact with positive break
Connection:
screw terminals
Cable section:
min. 0.75 mm² ... max. 1.5 mm²
(including conductor ferrules)
Cable entry:
2 x M20 x 1.5
Rated impulse withstand voltage U
imp
:
4 kV
Rated insulation voltage U
i
:
250 V
Thermal test current I
the
:
6 A
Utilisation category:
AC-15 / DC-13
Rated operating current/voltage I
e
/U
e
:
4 A / 230 VAC 4 A / 24 VDC
Max. fuse rating:
6 A gG D-fuse
Positive break travel:
3.8 mm
Positive break force:
min. 31 N
Ambient temperature:
–10 °C … +50 °C
Mechanical life:
max. 1 million operations
Latching force:
80 - 400 N (adjustable)
Cable gland and locking screws:
L
II 2GD
Cable cross-section of the cable glands:
min. Ø 7 mm;
max. Ø 12 mm
Tightening torques:
cover screws: min. 0.6 Nm
Bottom cover screws: min. 0.7 Nm
Cable gland: min. 8 Nm
Locking screw: min. 8 Nm
2.5 Safety classification
Standards:
ISO 13849-1
Envisaged structure:
- Basically:
applicable up to Cat. 1 / PL c
- With 2-channel usage and
fault exclusion mechanism*:
applicable up to Cat. 3 / PL d
with suitable logic unit
B
10D
NC contact:
2,000,000
B
10D
NO contact at 10% ohmic contact load:
1,000,000
Service life:
20 years
* If a fault exclusion to the 1-channel mechanics is authorised.
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.)
If multiple safety components are wired in series, the Performance
Level to ISO 13849-1 will be reduced due to the restricted error
detection under certain circumstances.
