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O P E R A T I N G I N S T R U C T I O N S
The UE44-3SL safety relay is used only for volt-free safety
sensors, e.g.:
• emergency stop pushbuttons (EN ISO 13 850): single-
UE44-3SL
channel, dual-channel, e.g. SICK ES21
• safety switches (EN 1088): single-channel, dual-channel
Safety relay
• safety switches with interlocking (EN 1088): single-
channel, dual-channel
2.3
Correct use
en
The UE44-3SL safety relay must be used only as defined in
section 2.2 "Applications of the device".
SICK AG • Erwin-Sick-Straße 1
It must be used only by qualified safety personnel and only
D-79183 Waldkirch • www.sick.com
on the machine where it has been installed and initialised
8009661/10CS/2018-08-02 • REIPA/XX
by qualified safety personnel in accordance with the opera-
Printed in Germany (2018-08) • All rights reserved
ting instructions. If the device is used for any other purposes
Subject to change without notice
or modified in any way — also during mounting and instal-
lation — any warranty claim against SICK AG shall become
void.
2.4
General safety notes and protective
measures
Pay attention to the safety notes and protective
measures!
Please observe the following items in order to en-
sure the correct use of the UE44-3SL safety relays.
1
Scope
• During the mounting, installation and usage of
the safety relays, observe the standards and
These operating instructions are only applicable to the
directives applicable in your country.
UE44-3SL safety relays with the following entry on the
• The national/international rules and regulations
type label in the field Operating Instructions: 8009661
apply to the installation, commissioning, use and
You will find the device's date of manufacture on the
periodic technical inspection of the safety relay,
type label in the field Date Code in the format yywwxxxx
in particular:
(yy = year, ww = calender week, xxxx = serial number).
– Machinery Directive
These operating instructions are original operating
– Work Equipment Directive
instructions.
– EMC directive
2
On safety
– the work safety regulations and safety rules
This chapter deals with your own safety and the safety
• Manufacturers and operators of the machine on
of the equipment operators.
which a safety relay is used are responsible for
= Please read this chapter carefully before working
obtaining and observing all applicable safety
with the UE44-3SL or with the machine protected by
regulations and rules.
the UE44-3SL.
• The tests must be carried out by qualified safety
personnel or specially qualified and authorised
2.1
Qualified safety personnel
personnel and must be recorded and documen-
The UE44-3SL safety relay must only be installed,
ted to ensure that the tests can be reproduced
commissioned and serviced by qualified safety
and retraced at any time by third parties.
personnel.
• The operating instructions must be made avai-
Qualified safety personnel are defined as persons
lable to the operator of the machine where the
who ...
UE44-3SL is used.
• have undergone the appropriate technical training
• The machine operator is to be instructed in the
and
use of the device by qualified safety personnel
and must be instructed to read the operating
• have been instructed by the responsible machine
operator in the operation of the machine and the
instructions.
current valid safety guidelines and
• have access to the operating instructions of the
3
Product description
UE44-3SL safety relay and have read and
familiarised themselves with them.
3.1
Structure and operating principle of the
device
2.2
Applications of the device
The inputs on the UE44-3SL safety relays are prepared for
The UE44-3SL safety relay can be used:
the connection of the safety sensors listed in section 2.2
• in accordance with EN ISO 13 849-1 up to PL e and
"Applications of the device". Two separate input circuits
category 4
control the internal relays. The two enable current paths and
• in accordance with EN 62 061 to SILCL3
the delayed switch on current path are designed as safe
outputs.
The actual category achieved depends on the external
circuit, the design of the wiring, the selection of the
3.2
Device functions
control switch and its placement on the machine.
Opening of the input circuits results in immediate opening
The UE44-3SL safety relay has been evaluated to
of two enable current paths and delayed closing of the third
UL 508.
current path.
The related actuators on the machine or system can be
Switch on delayed current path: This current path closes
safely shut down using the safety relay's output signal
with an adjustable delay of 0.15 ... 3 s or 1.5 ... 30 s in
switching contacts.
relation to the opening of the two enable current paths. As a
result a mechanical locking device can be triggered when
both input circuits open.
Manual reset: Closing the input circuits does not result in
• All connections, wiring and cable runs must comply with
immediate closing of the two enable current paths, this
the required category as per EN ISO 13 849-1 and the
action is only performed after the actuation of the reset
required SIL claim level as per EN 62 061 (e.g. cables
button. The delayed switch on current path opens at the
laid with protection, individually sheathed cable with
same time as the enable current paths are closed. The reset
screen etc.).
takes place with the falling or rising edge depending on the
• To protect the contact outputs on the UE44-3SL and to
circuit.
increase the service life, the loads connected must be
Automatic reset: Closing the input circuits results in the
equipped with, e.g., varistors and RC circuits. Please also
immediate closing of the two enable current paths. The
note that the selection of the arc suppression can in-
delayed switch on current path opens at the same time as
crease the total response time of the safety function.
the enable current paths are closed. This function is to be
• The output signal switching devices and the external
realised with a corresponding circuit.
device monitoring (EDM) must be wired in the control
Synchronous time monitoring: Simultaneous closing of the
cabinet.
input circuits is monitored. Only if input circuit 2 closes at
• To prevent the welding of the contacts on the built-in
the latest 0.5 s after input circuit 1, do the enable current
relay, an overcurrent protection device with max. 6 A
paths switch. If input circuit 2 closes before input circuit 1,
short-circuit protection (duty class gG) is to be integrated
no synchronous time is monitored and the enable current
into the enable current paths (see Fig. 2, fuse F2/F3/F4).
paths switch.
5.1
External device monitoring: The EDM function monitors the
contact elements activated by the enable current paths
Terminal
(e.g. motor contactors). By wiring the signalling contacts on
A1
the switching elements in series with the reset input, the
enable current paths only close if all switching elements are
A2
open. This control is only effective on reset.
S11
Cross circuit detection: A cross-circuit is detected on the
S33
dual-channel connection of the input circuits, if these are
S21
connected to different polarities.
S34
In order to attain SILCL3/PL e, connect the
S35
external device monitoring!
S12
In order to reach SILCL3/PL e, an external diagnosis
with DC ≥ 99 % must be applied (i.e. the external
S31
device monitoring must be connected).
S22
Please also read the notes in chapter 12 "Applica-
13–14
tion examples".
23–24
37–38
3.3
Status indicators
Display
Meaning
5.2
SUPPLY Ν Green
Supply voltage active
Single-channel operation
K1/K2 Ν Green
Relay K1 and K2 active
The safety sensor is connected between S11 and S12. Wire
jumpers are to be connected between S12 and S31 as well
K3/K4 Ν Green
Switch on delayed relays K3 and
K4 active
as between S21 and S22.
Dual-channel operation with cross-circuit detection
4
Mounting
The two volt-free switching elements on the safety sensor
are to be connected between S12 and S31 as well as
Mounting only with enclosure rating IP54 or
between S21 and S22. A wire jumper is to be connected
better!
between S11 and S31.
The safety relay is only allowed to be mounted in
5.3
the control cabinet. The control cabinet must at
least comply with enclosure rating IP54.
Manual reset
The reset button (N/O contact) is to be wired to the termi-
= Mounting in accordance with EN 50 274.
nals S33 and S34. The reset button is to be installed out-
= The modules are located in a 22.5 mm wide modular
side the hazardous area such that it cannot be pressed from
system for 35 mm mounting rails as per EN 60 715.
inside the hazardous area. When operating the reset button,
5
Electrical installation
the operator must have full visual command of the hazar-
dous area.
Switch the entire machine/system off line!
Automatic reset
The system can start up unexpectedly while you are
A wire jumper is to be connected between S33 and S35.
connecting the devices.
5.4
• The voltage supply must satisfy the regulations for extra-
The external device monitoring for the actuators integrated
low voltages with safe isolation (SELV, PELV) for over-
is only effective on reset. The connection of the N/C con-
voltage category III as per EN 60 664 and EN 50 178.
tacts for the contact elements operated in series with the
reset circuit provides static external device monitoring.
• For installation in environments with overvoltage catego-
ry III, external protection elements must be used. The re-
quired level of protection as per EN 62 305-1 can be
achieved using an external snubber circuit. The protec-
tion elements (SPD – surge protective devices) must
comply with the requirements as per EN 61 643-11.
Note:
The basic insulation of the components connected to the
module must match the highest voltage connected to the
module.
All circuits (and if necessary other EDM) must then also be
designed for the highest voltage level.
6
Commissioning and regular
tests
Commissioning requires a thorough check by
qualified safety personnel!
Before you operate a system protected by the safety
relay for the first time, make sure that the system is
first checked and released by qualified safety
personnel.
= Please read the notes in chapter 2 "On safety".
= Observe the relevant laws and national
regulations.
Check the hazardous area!
= Ensure there is nobody in the hazardous area
before commissioning.
Pin assignments
= Secure the hazardous area against entry.
Description
Regular inspection of the protective devices by qualified
Voltage supply (+24 V DC)
safety personnel
Voltage supply (0 V DC)
= Check the system following the inspection intervals
+24 V DC (control voltage)
specified in the national rules and regulations.
Supply for reset
– Each safety application must be checked at an interval
0 V DC (control voltage)
specified by you.
Reset (falling edge)
– The effectiveness of the protective devices must be
checked daily by a specialist or by authorised
Reset (rising edge)
personnel.
+ Input circuit 1 (K1)
= If changes have been made to the machine or the
+ Input circuit 2 (K2)
protective device, or the safety relay has been changed
– Input circuit 2 (K2)
or repaired, you must again thoroughly check the entire
safety application.
Enable current path 1
7
In the event of faults or errors
Enable current path 2
Switch on delayed current path
Cease operation if the cause of the malfunction
Operating modes
has not been clearly identified!
= Stop the machine if you cannot clearly identify or
allocate the error and if you cannot safely rectify
the malfunction.
Complete function test after rectification of
fault!
= After rectifying a fault, perform a complete
function test.
Reset
11
Internal circuitry
External device monitoring
Fig. 1: Internal circuitry UE44-3SL
8
Disposal
Always dispose of serviceableness devices in
compliance with local/national rules and
regulations with respect to waste disposal.
9
Ordering information
Part
Part number
(24 V DC design)
(type code)
UE44-3SL (0.15 ... 3 s)
6024907
with screw type terminals
(UE44-3SL2D33)
UE44-3SL (0.15 ... 3 s)
6024908
with removable terminals
(UE44-3SL3D33)
UE44-3SL (1.5 ... 30 s)
6024909
with screw type terminals
(UE44-3SL2D330)
UE44-3SL (1.5 ... 30 s)
6024910
with removable terminals
(UE44-3SL3D330)
10
Compliance with EU
directives
UE44-3SL, Safety relays
SICK AG, Erwin-Sick-Straße 1, D-79183 Waldkirch
You can call up the EU declaration of conformity and
the current operating instructions by entering the part
number in the search field at www.sick.com (part
number: see the type label entry in the "Ident. no."
field).
Direct link to EU declaration of conformity:
www.sick.com/9068881
The undersigned, representing the manufacturer, here-
with declares that the product is in conformity with the
provisions of the following EU directive(s) (including all
applicable amendments), and that the standards
and/or technical specifications stated in the EU decla-
ration of conformity have been used as a basis for this.
• MACHINERY DIRECTIVE 2006/42/EC
• EMC DIRECTIVE 2014/30/EU
• ROHS DIRECTIVE 2011/65/EU
Waldkirch: 2018-07-10
ppa. Walter Reithofer
ppa. Birgit Knobloch
Vice President R&D
Vice President Operations
(GBC Industrial Safety)
(GBC Industrial Safety)
authorized for technical
documentation
Notified body: No. 0340, DGUV Test, Prüf- und Zerti-
fizierungsstelle Elektrotechnik, Gustav-Heinemann-
Ufer 130, 50968 Köln
EC type-examination: ET 17072
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