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Operating Instructions
Safety Relay ESM-BT4..
Scope
These operating instructions apply to all safety
switchgear ESM-BT4...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)
(2109074)
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
ESM-BT4.. is an emergency stop safety relay com-
bination that combines non-time-delayed (u) and
time-delayed (v) contacts in a very compact housing.
This permits dangerous components of a system to
be switched off quickly and safely in an emergency
situation. At the same time, other safety circuits
can continue to be supplied with power for up to
30 seconds to allow a tool to be moved to its idle
position or to brake overtraveling parts, for example.
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.
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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
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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
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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
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which the device is incorporated must be vali-
dated by the user.
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Failure to observe the safety regulations can re-
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sult in death, severe injuries and serious damage.
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Note down the version of the device (see type la-
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bel Vx.x.x) and check it each time prior to setup.
If the version changes, the use of the device in
the overall application must be validated again.
Features
4 safe, redundant relay outputs. Depending on
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variant:
- 3 non-time-delayed contacts, 1 time-delayed
contact
- 2 non-time-delayed contacts, 2 time-delayed
contacts
- 1 non-time-delayed contact, 3 time-delayed
contacts
Continuously adjustable time delay (1 ... 30 s)
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or fixed time delay (ESM-BT4..-20S (2 s);
ESM-BT4..-50S (5 s))
Connection of:
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- Emergency stop buttons
- Safety switches
- Non-contact safety switches
- Safety components with OSSD outputs
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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- Monitored manual start
- Automatic start
Short circuit and ground fault monitoring
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Use up to PL e, SILCL 3, category 4
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Function
The moving parts of a machine or system can be
quickly and safely stopped in case of danger with the
non-time-delayed contacts of the ESM-BT4... Safety
contacts with time-delay switch-off are also integrat-
ed into the ESM-BT4... They are used whenever it is
safer to keep supplying power to parts of a machine
after the emergency stop button is actuated.
It is ensured that a single fault or malfunction does
not lead to a loss of the safety function and that
every fault is detected by cyclical self-monitoring
no later than when the system is switched off and
switched on again.
The time-delayed contacts switch on at the same
time as the non-time-delayed contacts, but they are
switched off again only after the time set on the
potentiometer elapses (1 ... 30 s) or after a fixed
time delay (ESM-BT4..-20S; ESM-BT4..-50S) when
the emergency stop button is operated.
The power supply must be present during the time
sequence.
5
ESM-BT401 (1 non-time-delayed/3 time-delayed)
ESM-BT411 (2 non-time-delayed/2 time-delayed)
ESM-BT421 (3 non-time-delayed/1 time-delayed)
Fig. 1: Block diagrams ESM-BT4..
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
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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
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