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Translation of the original instructions
BA000535 - 05/2010 (Rev. B)
SNO 4003K
13
23
33
Y3
A1
A1
Y1
Y2
SUPPLY
K1, K2
SNO 4003K
41
42
A2
A2
14
24
34
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!
6.
The devices must be installed in a cabinet
with a protection class of at least IP 54.
Caution!
Limited contact protection! Protection type ac-
cording to EN 60529.
Housing/terminals: IP 40/ IP 20.
Finger-proof acc. to EN 50274.
4
Basic device for Emergency-Stop Applications
•
Basic device to EN 60204-1:2005 and EN ISO 13849-1:2007 single E-stop monitoring.
•
PL e / category 4 in accordance with EN ISO 13849-1:2007 (previously EN 954:1997 cate-
gory 4)
•
SILCL 3 in accordance with EN 62061:2005
•
Stop category 0 acc. EN 60204-1
•
Manual or automatic start
•
3 Enabling paths, 1 signalling path
•
Feedback loop to monitoring external contactors
Device styles
SNO 4003K
with screw-type terminals
SNO 4003K-A with screw-type terminals pluggable
SNO 4003K-C with spring-type terminals pluggable
Front View
SUPPLY
LED green
K1, K2
LED green
Description of Device and Function
The Device is a single-channel safety switching device for emergency stop equipment conforming
to EN 60204-1, with self-monitoring on each ON-OFF cycle and positively driven relays.
The device has two reset inputs, Y2 (without reset monitoring) and Y3 (with reset monitoring). The
two relays, K1 and K2, are activated automatically (bridge Y1-Y2) or by operating the reset button
(on Y1-Y3). They switch to self-maintaining via their own contacts, if there is an electrical connec-
tion (emergency stop button, position switch) between terminal A1 and the supply voltage. After
this switch-on phase the enabling current paths are closed and the signalling current path is open.
If the electrical connections between terminal A1 and the supply voltage are interrupted, the ena-
bling current paths open and the signalling current path closes.
The excitation condition (self-maintaining) of the two channels is indicated by a green LED K1, K2.
A second green LED indicates the presence of supply voltage.
Proper Use
The device is for monitoring sensors (e.g. emergency stop buttons, position switches) that are used as
part of the safety equipment of machines for the purpose of protecting people, material and machinery.
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 ar-
ranged 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.
•
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. Assuming
B
that the
value for the maximum load is 400,000, this results in a maximum cycle number of
10d
400,000 / 0.1 x 30 = 133,333 switching cycles/year.
•
Operating the device not within the specifications may lead to malfunctions or the destruc-
tion of the device.
•
The supply input A1 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.
•
Expansion devices or external contactors with positively driven contacts can be used to dupli-
cate the enabling current paths.
•
The device and the contacts must be protected at max. 8 A.
•
The emergency stop chain must be closed before the reset button is activated.
•
If magnetic switches with reed contacts or sensors with semiconductor outputs are con-
nected the switch ON peak current must be noticed (see Technical Data).
•
Please consult the installation notes.
Please observe instructions from safety authorities.
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