Connection Diagrams - Wieland SNZ 1022K Betriebsanleitung

• The two-hand control device and the upstream and
downstream parts of the controller must conform to the
applicable VDE regulations and the safety requirements set
out in EN 574, EN 692, and EN 693.
• The performance level (PL) and safety category in accord-
ance with EN ISO 13849-1 depend on the external wiring,
the application case, the choice of control device and how
this is physically arranged on the machine.
• The user must carry out a risk assessment in accordance
with ISO 14121-1.
• The entire system/machine must undergo validation in
accordance with the applicable standards on the basis of
this.
• The stated performance level will only be achieved if,
taking into account the prevailing device load (see EN ISO
13849-1 Table C.1) and the application case, an average
number of switching cycles per year is not exceeded (see
EN ISO 13849-1, C.4.2 and Table K.1). With an electrical
service life of 1,000,000 switching cycles, at 1 A (resistive
load and 230 V AC), the maximum number of cycles, for
example, can be calculated as 1,000,000 / 0.1 x 39 =
256,410 switching cycles / year.
• Correct functioning and monitoring of synchronous
operation must be checked at least once a year.
• Only the enabling current path 11-14 may be used to
enabled hazardous movement. The current signalling path
11-12 is only permitted for non-safety-related tasks.
• Operating the device other than specified can result in
malfunctions or destruction of the device.
• The device must be installed so that there is no risk of
short circuits, in particular between T11 and T13.
• The device must be checked to ensure it is in perfect
3

Connection diagrams

SNZ 1022 K-A / K-C AC/DC 24 V
1 Two-hand pushbuttons T1 and T2
Doc. # BA000772 – 09/2016 (Rev. F)
N O TE
2 – 1 changeover contact (enabling
current path and current signalling
path)
working order before commissioning, after replacement of
modules and/or in the case of changes to an installation
that has already undergone acceptance.
• The connection cables must not be stripped to more than
8 mm.
• The expansion units of the SNE series or external contac-
tors with positively-driven contacts can be used for dupli-
cating the enabling current paths.
• The contacts must be fused with maximum 4 A operating
class gG.
• External loads must be equipped with a suitable protection
circuit for the load (e.g. RC elements, varistors, suppres-
sors, etc.) in order to reduce electromagnetic interference
and increase the service life of the output switching ele-
ments.
• The application-specific standards must be observed when
installing and operating the device.
• The switch-on peak current must be considered when
connecting solenoid switches with reed contacts or sen-
sors with semiconductor outputs (see Technical data).
• The safety functions have not been checked by UL. The
certification process has been carried out in accordance
with the requirements for general applications as stipulat-
ed by UL508.
SNZ 1022 K-A / K-C AC 115 V -230 V
SNZ 1022K
N O TE
3 – Power supply
EN 6