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Translation of the original instructions
SNA 4043K/KM, SNA 4063K/KM, SNA 4044K/KM, SNA
4064K/KM
Safety Instructions
Only trained professional electricians may in-
stall, startup, modify, and retrofit this equip-
ment! Disconnect the device / system from all
power sources prior to starting any work! If
installation or system errors occur, line voltage
may be present at the control circuit in devices
without DC isolation!
Observe all electrical safety regulations issued
by the appropriate technical authorities or the
trade association. The safety function can be
lost if the device is not used for the intended
purpose. Opening the housing or any other ma-
nipulation will void the warranty.
Caution!
If the device has been subjected to improper or
incorrect use it must no longer be used, and the
guarantee loses its validity. Impermissible con-
ditions include:
strong mechanical stress, for example through a
fall, or voltages, currents, temperatures or hu-
midity outside of the specifications.
Before starting up your machine/plant for the
first time, please be sure to check all the safety
functions according to valid regulations, and
observe the specified test cycles for safety
equipment.
Caution!
Perform the following precautionary steps prior
to installation, assembly, or disassembly:
1.
Disconnect supply voltage to the equip-
ment / system prior to starting any work!
2.
Lockout/tag the equipment / system to
prevent accidental activation!
3.
Confirm that no voltage is present!
4.
Ground the phases and short to ground!
5.
Protect against adjacent live components
using guards and barriers!
Caution!
Limited contact protection! Protection type ac-
cording to EN 60529.
Housing/terminals: IP 40/ IP 20.
Finger-proof acc. to VDE 0660 Part 514.
BA000658 - 05/2012 (Rev. E)
Basic device for Emergency-Stop and Safety Gate Applications
Applicable for stop categories 0 (EN 60204-1)
Application up to category 4/PL e (EN ISO 13849-1:2007)
Application up to SIL CL 3 (EN 62061)
Single or two channel control
With or without cross monitoring
4 Enabling paths SNA 4044K/KM, SNA 4064K/KM
3 Enabling paths, 1 signaling path SNA 4043K/KM, SNA 4063K/KM
Manual or automatic start
Device style
SNA 40xxK/KM
with screw-type terminals
SNA 40xxK/KM-A
with screw-type terminals pluggable
SNA 40xxK/KM-C
with spring-type terminals pluggable
Front View
SUPPLY
LED green
K1
LED green
K2
LED green
Description of Device and Function
This device is a two-channel safety switching device for safety applications with self-monitoring
on each ON-OFF cycle. It conforms to EN 60204-1, EN 81-1/2, EN 50156-1 and is equipped with
positively driven relays.
After supply voltage has been connected to terminals A1/A2 and the safety inputs closed, operat-
ing the reset button closes the enabling current paths (manual start). When the safety inputs are
opened/de-excited the enabling current paths will open.
Proper Use
The devices are safety switching devices. They must only be used as components of safety equipment on
machines intended to protect persons, material and plant.
Notes
The Performance Level (PL) and safety category in accordance with EN ISO 13849-1 depends on
the external wiring, the application case, the choice of control station 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 stan-
dards on the basis of this.
In order for the specified Performance Level (PL) to be achieved, an average annual number of
switching cycles must not be exceeded (see EN ISO 13849-1, C.2.4 and Tab. K.1), taking into ac-
count the prevailing device load (see EN ISO 13849-1, Tab. C.1) and the application case. As-
suming that the B10d value for the maximum load is 400,000, this results in a maximum cycle
number of 400,000 / 0.1 x 30 = 133,333 switching cycles/year.
The supply input A1 also serves as a control input. This may lead to short disruptions or a lower-
ing below the operating voltage in order to switch to the release path.
The indicated times must be observed when the device is operated, otherwise the device could
lock. Locking can be cancelled by opening the safety inputs properly. The SNA40xx/KM types
are especially suitable for use in applications with fast and short bounce operations, since these
devices prevent locking.
SNE expansion devices or external contactors with positively driven contacts can be used to
duplicate the enabling current paths.
The devices are equipped with overload protection (for short-circuit). After the malfunction has
been dealt with, the device is operational again in approx. 3 s.
Control output S11 is exclusively for connecting control devices as defined in the operating in-
structions and not for connecting external consumers such as lamps, relays or contactors.
The devices must be installed in a cabinet with a protection class of at least IP 54.
With the application in furnaces output circuits are to be secured with 0.6 * I
Please observe instructions from safety authorities and national regulations.
Device Types Overview
Enabling
Paths
SNA 4043K/KM
3
SNA 4063K/KM
3
SNA 4044K/KM
4
SNA 4064K/KM
4
* With supervised manual start, the safety circuits S12 and S52/S22 must be closed
before start (at S34).
Signaling
Paths
Automatic
Manual
1
x
1
--
--
x
--
--
.
n
Start
Manual
supervised*
x
--
--
x
x
--
--
x
3
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