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Operating Instructions
Safety Relay ESM-BL2..
Scope
These operating instructions apply to all emergency
stop safety switching devices ESM-BL2...V1.1.X.
These operating instructions, the document Safety
information and maintenance and any available
data sheet form the complete user information for
your device.
Important!
Make sure to use the operating instructions
valid for your product version. Please contact the
EUCHNER Service team if you have any questions.
Supplementary documents
The overall documentation for this device consists
of the following documents:
Document title
Contents
(document number)
Safety information
Basic safety information
(2525460)
Operating instructions
(this document)
(2090070)
Declaration of con-
Declaration of conformity
formity
Any additions to the
Take any associated additions to
operating instructions
the operating instructions or data
sheets into account.
Important!
Always read all documents to gain a complete
overview of safe installation, setup and use of
the device. The documents can be downloaded
from www.euchner.com. For this purpose, enter
the doc. no. or the order number for the device
in the search box.
Correct use
The ESM-BL2.. is a low-cost emergency stop safety
switching device with which machines and systems
can be safely switched off by disconnecting the
power supply.
Applications for the ESM-BL2.. include single- or
dual-channel emergency stop circuits and guard
monitoring on machines and installations.
Before the device is used, a risk assessment must
be performed on the machine, e.g. in accordance
with the following standards:
EN ISO 13849-1
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EN ISO 12100
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IEC 62061.
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Correct use includes observing the relevant require-
ments for installation and operation, particularly
based on the following standards:
EN ISO 13849-1
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EN 60204-1
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IEC 62061.
f
Important!
The user is responsible for the integration of the
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device in a safe overall system. For this purpose,
the overall system must be validated, e.g. in
accordance with EN ISO 13849-1.
The device user must assess and document
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remaining risks.
If a data sheet is included with the product, the
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information on the data sheet applies.
Safety precautions
WARNING
Installation and setup of the device must be
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performed only by authorized personnel.
Observe the country-specific regulations when
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installing the device.
The electrical connection of the device is only
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allowed to be made with the device isolated.
The wiring of the device must comply with the
f
instructions in these operating instructions,
otherwise there is a risk that the safety function
will be lost.
It is not allowed to open the device, tamper with
f
the device or bypass the safety devices.
All relevant safety regulations and standards are
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to be observed.
The overall concept of the control system in
f
which the device is incorporated must be vali-
dated by the user.
Failure to observe the safety regulations can re-
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sult in death, severe injuries and serious damage.
Note down the version of the device (see type la-
www
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bel Vx.x.x) and check it each time prior to setup.
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If the version changes, the use of the device in
the overall application must be validated again.
Features
2 safe, redundant relay outputs
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Connection of:
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- Emergency stop buttons
- Safety switches
- Non-contact safety switches
Single- and dual-channel operation possible
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Feedback loop for monitoring downstream contac-
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tors or expansion modules
Cyclical monitoring of the output contacts
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Indication of the switching state via LED
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2 starting behaviors possible:
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- Manual start
- Automatic start
Short circuit and ground fault monitoring
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Up to PL d, SILCL 2, category 3
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Function
The emergency stop safety switching device
ESM-BL2.. is designed for safe isolation of safety
circuits according to EN 60204-1 and can be
used up to safety category 3, PL d according to
EN ISO 13849-1.
The internal logic system closes the safety contacts
when the start button is pressed.
When the safety switch is opened, the positively
driven safety contacts open and safely switch off
the machine. It is ensured that a single fault does not
lead to a loss of the safety function and that every
internal fault is detected by cyclical self-monitoring
no later than when the system is switched off and
switched on again. Only a fault in the safety switch
itself is not detected. The switch must be checked
regularly as part of a maintenance plan.
Fig. 1: Block diagram for ESM-BL2..
4
Mounting
As per EN 60204-1, the device is intended for in-
stallation in control cabinets with a minimum degree
of protection of IP54. It is mounted on a 35 mm
mounting rail according to DIN EN 60715 TH35.
Important!
Sufficient heat dissipation is to be ensured in the
f
control cabinet.
For the AC 115 V/230 V variant, maintain a
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distance of min. 10 mm to neighboring devices.
Fig. 2: Mounting/removing
Electrical connection
When the 24 V version is used, a safety transform-
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er according to EN 61558-2-6 or a power supply
unit with electrical isolation from the mains must
be connected.
External fusing of the safety contacts must be
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provided.
A maximum length of the control lines of 1,000 m
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with a conductor cross-section of 0.75 mm² must
not be exceeded.
The conductor cross-section must not exceed
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2.5 mm².
If the device does not function after setup, it must
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be returned to the manufacturer unopened. Open-
ing the device will void the warranty.
A suppressor circuit suitable for inductive loads
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(e.g. free-wheeling diode) is to be provided.
A1
Power supply
A2
Power supply
S11
DC 24 V control voltage
S21
Control line
13-14
Safety contact 1
23-24
Safety contact 2
Fig. 3: Connections
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