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Operating Instructions
Safety Contact Expansion ESM-ES3..
Scope
These operating instructions apply to all safety con-
tact expansions ESM-ES3...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)
(2090074)
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 contact expansion ESM-ES3.. in combination
with any safety relay from the EUCHNER ESM series
can be used to produce up to three additional safety
paths per device. An existing system can thus be
expanded practically indefinitely in a modular man-
ner. Control is via a safety contact of the safety
relay; the ESM-ES3 provides monitoring contacts
for error monitoring. The devices can be used in
systems up to safety category 4, PL e according
to EN ISO 13849-1.
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
f
installing the device.
The electrical connection of the device is only
f
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
f
to be observed.
The overall concept of the control system in which
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the device is incorporated must be validated by
the user.
www
Failure to observe the safety regulations can re-
f
sult in death, severe injuries and serious damage.
www
Note down the version of the device (see type la-
f
www
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
3 safe, redundant relay outputs
f
1 auxiliary contact (error monitoring)
Control via safety relay from the EUCHNER ESM
f
series
Modular, freely configurable safety system
f
Error monitoring by safety relay
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Ground fault monitoring
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Indication of the switching state via LED
f
Use up to PL e, SILCL 3, category 4
f
Function
The contact expansion ESM-ES3.. in combination
with a safety relay from the EUCHNER ESM series
is designed for safe isolation of safety circuits ac-
cording to EN 60204-1 and can be used up to safety
category 4, PL e according to EN ISO 13849-1.
Terminal S11 (DC 24 V control voltage) is connected
with terminals S15 and S16 via the safety contacts
of the safety relay. Starting the safety relay also
activates the ESM-ES3... The safety relay discon-
nects the control voltage when the safety switch is
operated, and the safety contacts of the ESM-ES3..
open immediately.
If a fault occurs in the ESM-ES3.., this is detected by
the safety relay via terminals S23 and S24.
Independent operation without a safety relay
is not possible.
Fig. 1: Block diagram for ESM-ES3..
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
f
distance of min. 10 mm to neighboring devices.
Fig. 2: Mounting/removing
Electrical connection
When the 24 V version is used, a safety transform-
f
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.
PE (protective earth) must be connected to termi-
f
nal S10 on the AC 115/230 V variant. Wiring of
the overall device is to be designed for 115/230 V.
A suppressor circuit suitable for inductive loads
f
(e.g. free-wheeling diode) is to be provided.
A1
Power supply
A2
Power supply
S11
DC 24 V control voltage
S10
Control line
S15
Control line
S16
Control line
S23
Error monitoring
S24
Error monitoring
13-14
Safety contact 1
23-24
Safety contact 2
33-34
Safety contact 3
Fig. 3: Connections
Setup procedure
Notice
The items listed under Electrical connection must
be observed during setup.
1. Wiring ESM-ES3..:
Wire the ESM-ES3.. with the EUCHNER safety relay
according to your application (see Fig. 5 and Fig. 6).
2. Wiring safety relay:
Wire the safety relay according to the required
Performance Level determined (see operating
instructions for the safety relay).
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