EUCHNER ZSM User manual

4
Operating Instructions
Enabling Switch ZSM
Correct use
The enabling switches described are manually
actuated command switches that make it possi‑
ble to work in the danger zone of machines and
installations.
Enabling switches represent part of a safety‑related
control system according to ENISO13849‑1 or
EN62061 and fulll a safety function. In conjunction
with other safety functions, e.g. SLS = Safely Limited
Speed according to EN61800‑5‑2, the enabling
switches can be used as part of an enabling system
according to ENISO12100 for working with open
guards or protective devices switched‑off. The var‑
ious safeguards must be activated via a control or
operating mode selector switch that can be locked
in every position or an equivalent device.
The device possesses a three‑position enabling
switch according to EN60947‑5‑8 or is a device
for enabling control with three positions according
to EN60204‑1. A dangerous movement is only
allowed to be enabled in position 2 (center position).
Authorized operating personnel can then enter the
danger zone, e.g.:
ffor setting up
ffor observing work sequences
ffor maintenance.
Before the device is used, a risk assessment must
be performed on the machine, e.g. in accordance
with the following standards:
fENISO13849‑1, Safety of machinery – Safety‑re‑
lated parts of control systems – Part 1: General
principles for design
fENISO12100, Safety of machinery – General
principles for design – Risk assessment and risk
reduction
fIEC62061, Safety of machinery – Functional
safety of safety‑related electrical, electronic and
programmable electronic control systems.
Correct use includes observing the relevant require‑
ments for installation and operation, particularly
based on the following standards:
fENISO13849‑1, Safety of machinery – Safety‑re‑
lated parts of control systems – Part 1: General
principles for design
fEN60204‑1, Safety of machinery – Electrical
equipment of machines – Part 1: General re‑
quirements
fIEC62061, Safety of machinery – Functional
safety of safety‑related electrical, electronic and
programmable electronic control systems.
Important!
fThe user is responsible for the integration of the
device in a safe overall system. For this purpose,
the overall system must be validated, e.g. in
accordance with ENISO13849‑2.
fThe enabling switch user must assess and
document remaining risks.
fIf a data sheet is included with the product, the
information on the data sheet applies.
Description of the safety function
If 2‑channel evaluation of the enabling switch is used
with monitoring for same contact state or antivalent
contact state, category 3 as per ENISO13849‑1
is achieved.
Devices from this series feature the following safety
function:
Enable control
(Manually activated interlocking function in a
control system according to EN60204‑1)
Safety function:
fIf the enabling switch is not pressed (position 1),
at least one of the contacts is open.
fIf the enabling switch is pressed all the way down
(position 3), at least one of the contacts is open.
Safety characteristic:
fB10D (see section Technical data).
Depending on the version, other functions may be
possible such as a key‑operated switch, a stop
button etc. These additional parts are not allowed
to be used as part of a safety function.
Exclusion of liability and warranty
In case of failure to comply with the conditions for
correct use stated above, or if the safety regula‑
tions are not followed, or if any servicing is not
performed as required, liability will be excluded and
the warranty void.
General safety precautions
Enabling switches fulll personnel protection func‑
tions. Incorrect installation or tampering can lead to
fatal injuries to personnel.
Check the safe function of the guard particularly
fafter any setup work
fafter the replacement of a system component
fafter an extended period without use
fafter every fault.
Independent of these checks, the safe function of
the guard should be checked at suitable intervals
as part of the maintenance schedule.
fNo commands for potentially hazardous conditions
are allowed to be initiated with enabling switches
alone.
fThe safety function of enabling switches must not
be bypassed (bridging of contacts), tampered with
or otherwise rendered ineffective.
fThe enabling switch must be protected against
attempts by the operator to bypass its function.
fEnabling switches may be used only by autho‑
rized persons who can recognize hazards in
time and who are able to take appropriate action
immediately.
fEvery person present in the danger zone must car‑
ry his/her own enabling switch on his/her person.
fMounting, electrical connection and setup only by
authorized personnel.
In the event of functional faults or damage, the
enabling switch must be replaced. The device may
be repaired only by the manufacturer.
Important!
Prior to use, read the operating instructions and
keep these in a safe place. Ensure the operating
instructions are always available during mount‑
ing, setup and servicing. You should archive a
printed copy of the operating instructions. You
can download the operating instructions from
www.euchner.com.
Function
Enabling switches are used as a manual interlocking
device for a control system (enable control). In posi‑
tion 2, the enabling switch permits machine opera‑
tion with a separate start control. In position 1 and
in position 3, a stop function must be initiated by the
machine control and machine operation prevented.
fPosition 1: Off function, pushbutton not pressed
fPosition 2: Enabling function (ON), pushbutton
pressed to center position (actuating
point)
fPosition 3: Off function, pushbutton pressed to
end stop
The enabling function is canceled by releasing the
pushbutton or pressing it beyond the actuating
point. The enabling function does not reactivate as
it passes position 2 while returning from position 3
to position 1.
Optional functions
Important: If the optional functions are used, pay
attention to the applicable standard and directive
relevant to your specic application.
Note: For connection see data sheet enclosed.
Vibration signal
The vibration signal (pulses) is used for tactile
feedback of the enabling position.
LED indicator
The LED indicator is used for visual feedback directly
at the enabling switch.
Stop command device
Dual‑channel emergency stop device (red, with
pull‑to‑reset and turn‑to‑reset button) according to
ENISO13850 and EN60947‑5‑5 or machine stop
(gray, with pull‑to‑reset and turn‑to‑reset button) on
the switch housing, for different wiring concepts.
Lower position, protected by anti‑kink strain relief
in case of a fall.
+ and – buttons / C button
These buttons can be congured individually. The
+ and – buttons are used, for example, for moving
axes in the positive or negative direction, the C
(Cancel) button as a reset button.
Key‑operated switch
For individual use, e.g. as operating mode selector
switch.
Selector switch
As required, the adjustable detent positions can, e.g.
be used for axis, speed or range selection.
Rotary potentiometer
For individual use, e.g. for adjusting the speed.
One‑touch function (joystick)
The four contacts are connected to a common pin.
This permits a one‑touch function irrespective of the
actuating direction.
Mounting
A suitable holder must be used for enabling switch‑
es. You will find corresponding accessories at
www.euchner.com.
Electrical connection
WARNING
There will be no safety function if installed or
connected incorrectly. This situation can result
in serious accidents and injuries or even fatality.
fInstallation and electrical connection must be
performed only by qualied personnel.
fAll electrical outputs must have an adequate
protective circuit for inductive loads. The outputs
must be protected with a free‑wheeling diode for
this purpose. RC interference suppression units
must not be used.
Connecting enabling switch
Selecting contacts or contact combinations
Always use a dual‑channel, safe input to connect an
enabling switch to a safety evaluation unit. Use the
recommended contact combination (for example
see Figure 1).
If you use your own contact combination, please pay
attention to the following notes:
Connect the enabling switch such that
fTwo independent switching contacts or contact
combinations are used.
fThe switching contacts or contact combinations
are either antivalent (one normally open contact
and one normally closed contact) or equivalent
(two normally closed contacts).

5
Operating Instructions
Enabling Switch ZSM
The parameters for this connection must be cong‑
ured in the safe evaluation unit to suit the switching
contacts chosen and their wiring. For this purpose
use the appropriate parameters:
fDual‑channel equivalent evaluation
Both contacts are closed at the same time in the
enabling position (position 2)
fDual‑channel antivalent evaluation
One contact is open in the enabling position (po‑
sition 2), the second closed
fDiscrepancy time
Activate the discrepancy monitoring. Because the
two contacts never switch exactly simultaneously,
you must specify a time within which simultaneity
applies. A time of 3s has proven appropriate for
electromechanical contacts.
fResetting after fault detection
Select the parameters such that after a fault
the enabling switch is automatically reset if both
contacts were in the open position (for equivalent
contacts) or one contact was open and the other
closed (for antivalent contacts) and they are then
placed again in the correct position for enabling.
This action can be achieved by releasing and
pressing again the enabling switch.
This automatic reset is important above all if an
enabling switch is to be used for an extended pe‑
riod. Often position 2 (enabling) is only left a little
due to fatigue of the operator's hand or thumb. In
this situation, only one of the contacts signals a
release, the other remains in the enabling position.
The control system interprets this situation as
an enabling switch fault. Now it is helpful if it is
possible to continue working by simply releasing
and pressing again.
Should this not be possible, to some extent the
fault can also be automatically acknowledged by
the control system by means of the programming.
In any case, please ensure that release is detected
unambiguously (both contacts in position 1 …
again) to rule out any faults in the wiring!
Hazards due to crushing or cutting of the connection
cable must be prevented by suitable measures.
These include:
fProtection of the connecting cable against inad‑
missible loads (e.g. crushing, shearing) by means
of suitable laying.
fUsage of an evaluation unit that makes it possible
to monitor for short circuits and the simultaneity
of the channels.
fUsage of cables with individually screened cores.
These screens are to be connected to the ma‑
chine's earthing system so that cable short circuits
can be detected and the control system shut down
immediately by the triggering of the short circuit
protection.
Notes on
For use and operation as per the UL requirements,
a power supply with the feature for use in class 2
circuits must be used.
Functional check
WARNING
Danger of fatal injury as a result of faults in instal‑
lation and functional check.
fBefore carrying out the functional check, make
sure that there are no persons in the danger
zone.
fObserve the valid accident prevention regula‑
tions.
Check the enabling switch by means of a functional
check (enabling only in position 2). Check that there
is no enable function in position 2 after reaching
position 3 and releasing again.
Depending on the version: check the integrated
functions, such as stop button, key‑operated rotary
switch, LEDs, etc.
Inspection and service
WARNING
Danger of severe injuries due to the loss of the
safety function.
fIf damage or wear is found, the complete device
must be replaced. Replacement of individual
parts or assemblies is not permitted. The device
may be repaired only by the manufacturer.
fCheck the device for proper function at regular
intervals and after every fault.
Inspection of the following is necessary to ensure
trouble‑free long‑term operation:
fcorrect switching function
fdamage, heavy contamination, dirt and wear
fsealing of cable entry
floose cable connections or plug connectors.
Information: The year of manufacture can be seen
in the bottom, right corner of the type label.
Disposal
Pay attention to the applicable national regulations
and laws during disposal.
EC declaration of conformity
The declaration of conformity is part of the operating
instructions, and it is included as a separate sheet
with the unit.
The EC declaration of conformity can also be found
at: www.euchner.com
Service
If service support is required, please contact:
EUCHNER GmbH + Co. KG
Kohlhammerstraße 16
70771 Leinfelden‑Echterdingen
Germany
Service telephone:
[phone]‑500
Fax:
[phone]
E‑mail:
[e-mail]
Internet:
www.euchner.com
Technical data, general
Parameter Value
Material
Housing
Enabling switch
Grip/seal
PA
CR
TPE
Degree of protection
acc. to IEC60529 IP54
Ambient temperature ‑5…+60°C
Degree of contamination
(external, according to
EN60947‑1)
3 (industrial)
Enabling switch switching
contacts 3 changeover contacts
Mechanical life 1x106operating cycles
Utilization category
acc. to IEC60947‑5‑1
(for enabling switch S4)
DC13 Ue=24V Ie=1A
Short circuit protection
according to IEC60269‑11) 2AgG
Actuating force See Figure 2
Weight Approx. 1.1kg
Cable resistance ≥145W/km
Conductor cross‑section 0.14mm2
Cable length 5m
Rated impulse withstand
voltage Uimp=1.5kV
Rated insulation voltage Ui=250V
Conditional short‑circuit current 100A
Reliability values acc. to ENISO13849‑1
B10D 1x105
1) In case of deviating cable lengths, the short circuit protection must
be dimensioned accordingly and checked.
Technical data, components
Emergency stop Value
Standard ENISO13850 / EN60947‑5‑5
Utilization category
acc. to IEC60947‑5‑1 DC‑13 Ue=24V Ie=3A
B10D 0.1 x 106
Selector switch
Output code See data sheet
Switching voltage, max. 25VAC/DC
Breaking capacity max. 0.2VA
Key‑operated switch
Switching voltage, max. 30VAC/DC
Switching current, max. 0.25A
Pushbutton
Switching voltage, max. 30VDC
Switching current, max. 0.1A
Rotary potentiometer
Resistance 4.7kΩ
Actuating torque 0.5…3.5Ncm
Single‑color LED indicator
Housing Chrome‑plated
Operating voltage 24V
Color Yellow or red
Two‑color LED indicator
Forward current typ. 0.02A
Voltage red 1.85V
Voltage green 2.2V
Mini joystick
Utilization category
acc. to IEC60947‑5‑1 DC‑13 Ue=24V Ie=0.3A

Operating Instructions
Enabling Switch ZSM
6
Subject to technical modications; no responsibility is accepted for the accuracy of this information. © EUCHNER GmbH + Co. KG 2098540‑06‑06/19 (translation of the original operating instructions)
Figure 1: Application example
0246
10
20
30
40
0
a
b
1 32
Figure 2: Diagram of actuating force as a function
of actuating travel
Actuating travel [mm]
Actuating force approx. [N]]
Figure 3: Dimension drawing, enabling switch ZSM and holder
180
5000
<79>
40
Plus/minus button *
Key‑operated switch *
LED *
Enabling switch
Stop device *
* Optional, depending on version
53
47
75
Mounting magnet or screws, depending on version
Holder for enabling switch ZSM
Cable end sleeves
DC 24 V
GND
-S1
12 3
E1
0V
M
-
+
+24V
E2 E3
EUCHNER
ZS-M 09xxxx
A1
24VDC
A1
A2
S11
S10
ESM-BA2xx
S13
EUCHNER
S21S12
K1
+
S14
K2
+
13
14
23
24
Monitored
start
Stage