EUCHNER ESM-BL2 Series User manual

1
Operating Instructions
Safety Relay ESM-BL2..
Correct use
The ESM-BL2.. is a low-cost emergency stop safety
relay with which machines and systems can be
safely switched off by disconnecting the power
supply. Internal error monitoring takes place during
restarting via the start button.
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. according to the
following standards:
fENISO13849-1
fENISO12100
fIEC62061.
Correct use includes observing the relevant require-
ments for installation and operation, particularly
based on the following standards:
fENISO13849-1
fEN60204-1
fIEC62061.
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. according to ENISO13849-2.
fThe device user must assess and document
remaining risks.
fIf a data sheet is included with the product, the
information on the data sheet applies.
Safety precautions
WARNING
fInstallation and setup of the device must be
performed only by authorized personnel.
fObserve the country-specic regulations when
installing the device.
fThe electrical connection of the device is only
allowed to be made with the device isolated.
fThe wiring of the device must comply with the
instructions in these operating instructions,
otherwise there is a risk that the safety function
will be lost.
fIt is not allowed to open the device, tamper with
the device or bypass the safety devices.
fAll relevant safety regulations and standards are
to be observed.
fThe overall concept of the control system in
which the device is incorporated must be vali-
dated by the user.
fFailure to observe the safety regulations can re-
sult in death, severe injuries and serious damage.
fNote down the version of the device (see type la-
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
f2 safe, redundant relay outputs
fConnection of:
- Emergency stop buttons
- Safety switches
- Non-contact safety switches
fSingle- and dual-channel operation possible
fFeedback loop for monitoring downstream contac-
tors or expansion modules
fCyclical monitoring of the output contacts
fIndication of the switching state via LED
f2 starting behaviors possible:
- Manual start
- Automatic start
fShort circuit and ground fault monitoring
fUp to PLd, SILCL2, category3
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..
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.
Fig. 2: Mounting/removing
Electrical connection
fWhen the 24 V version is used, a safety transform-
er according to EN61558-2-6 or a power supply
unit with electrical isolation from the mains must
be connected.
fExternal fusing of the safety contacts must be
provided.
fA maximum length of the control lines of 1,000 m
with a conductor cross-section of 0.75mm² must
not be exceeded.
fThe conductor cross-section must not exceed
2.5mm².
fIf the device does not function after setup, it must
be returned to the manufacturer unopened. Open-
ing the device will void the warranty.
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
Setup procedure
Notice
The items listed under Electrical connection must
be observed during setup.
1. Wiring emergency stop circuit:
Wire the emergency stop circuit according to the
required Performance Level determined (see Fig.
5 to Fig. 7).
2. Wiring start circuit:
Wire the start circuit according to Fig. 8 or Fig. 9 to
set the starting behavior.
Attention: If Automatic start is set, bear in mind that
the safety contacts will switch immediately after the
power supply is connected. If Monitored manual start
is set, the start button must be opened after wiring.
3. Wiring feedback loop:
If your application provides for external contactors
or expansion modules, connect them to the device
according to Fig. 10 or Fig. 11.
4. Wiring power supply:
Connect the power supply to terminals A1 and A2
(see Fig. 12).
Attention: Wiring only in de-energized state.
5. Starting the device:
Switch the operating voltage on.
Attention: If the Automatic start behavior is set, the
safety contacts will close immediately.
If the Monitored manual start behavior is set, close
the start button to close the safety contacts.
LEDs K1 and K2 illuminate.
6. Activating safety function:
Open the emergency stop circuit by actuating the
connected safety switch. The safety contacts open
immediately.
7. Reactivating:
Close the emergency stop circuit. If Automatic
start is selected, the safety contacts will close
immediately.
If the Monitored manual start behavior is set, close
the start button to close the safety contacts.

2
Operating Instructions
Safety Relay ESM-BL2..
What to do in case of a fault?
Device does not switch on:
fCheck the wiring by comparing it to the wiring
diagrams.
fCheck the safety switch used for correct function
and adjustment.
fCheck whether the emergency stop circuit is
closed.
fCheck whether the start button (with manual start)
is closed.
fCheck the operating voltage at A1 and A2.
fIs the feedback loop closed?
Device cannot be switched on again after an
emergency stop:
fCheck whether the emergency stop circuit was
closed again.
fIs the feedback loop closed?
If the fault persists, perform the steps listed under
Setup procedure.
If these steps do not remedy the fault either, return
the device to the manufacturer for examination.
Opening the device is impermissible and will
void the warranty.
Maintenance
The device must be checked once per month for
proper function and for signs of tampering and
bypassing of the safety function. The device is
otherwise maintenance-free, provided that it was
installed properly.
Disposal
Pay attention to the applicable national regulations
and laws during disposal.
EU declaration of conformity
The declaration of conformity is part of the operating
instructions, and it is included as a separate sheet
with the device.
The EU declaration of conformity can also be found
at: www.euchner.com
Service
If servicing is required, please contact:
EUCHNER GmbH + Co. KG
Kohlhammerstraße 16
70771 Leinfelden-Echterdingen
Germany
Service telephone:
[phone]
E-mail:
[e-mail]
Internet:
www.euchner.com
Technical data
Parameter Value
Version ESM-BL201 ESM-BL202 ESM-BL203
Operating voltage AC/DC 24 V AC 115V AC 230 V
Rated supply frequency 50 - 60 Hz
Permissible deviation ± 10%
Power consumption DC 24 V AC 230 V
Approx. 1.2 W Approx. 3.5 VA
Control voltage at S11 DC 24 V
Control current S11 Approx. 40 mA
Safety contacts 2 NO contacts
Max. switching voltage AC 250 V
Safety contact breaking capacity
(13-14, 23-24)
AC: 250 V, 1,500 VA, 6 A for ohm resistive load
250 V, 4 A for AC-15
DC: 24 V, 30 W, 1.25 A for ohm resistive load
24 V, 2 A, for DC-13
Minimum contact load 24 V, 20 mA
Contact fuses 6 A gG
Conductor cross-section 0.14 - 2.5 mm²
Max. length of control cable 1,000 m with 0.75 mm²
Contact material AgNi
Mech. contact life Approx. 1 x 107
Test voltage 2.5 kV (control voltage/contacts)
Rated impulse withstand voltage, leakage
paths/air gaps 4 kV (DIN VDE 0110-1)
Rated insulation voltage 250 V
Degree of protection IP20
Temperature range DC24V: -15°C to +60°C
AC230V/115V/24V: -15°C to +40°C
Degree of contamination 2 (DIN VDE 0110-1)
Overvoltage category 3 (DIN VDE 0110-1)
Weight Approx. 230g
Mounting Mounting rail according to DIN EN 60715 TH35
Reliability values according to EN ISO 13849-1 for all variants of the series ESM-BL2 1)
Load (DC-13; 24V) ≤0.1 A ≤1 A ≤2A
nop ≤400,000 cycles ≤73,000 cycles ≤17,000 cycles
T10D 20 years
Category 3
PL d
PFHD1.03x10-7 1/h
1) Additional data can be requested from the manufacturer for applications that deviate from these conditions.
Fixed terminals Plug-in terminals
Fig. 4: Dimension drawing for ESM-BL2..

Operating Instructions
Safety Relay ESM-BL2..
3
Subject to technical modications; no responsibility is accepted for the accuracy of this information. © EUCHNER GmbH + Co. KG 2090070-09-08/22 V1.1.0 (translation of the original operating instructions)
Applications
Depending on the application or the result of the risk assessment according to DINENISO13849-1, the device must be wired as shown in Fig. 5 to Fig. 13.
Emergency stop circuit
Fig. 5: Dual-channel emergency stop circuit without
error monitoring of the emergency stop
button and the supply cables (category3,
up to PLd).
Fig. 6: Single-channel emergency stop circuit with-
out error monitoring of the emergency stop
button and the supply cables (category1,
up to PLc).
Fig. 7: Dual-channel sliding guard monitoring with
positively driven limit switches (category3,
up to PLd).
Notice:
Wire the start circuit in accordance with the application according to Fig. 8 or Fig. 9.
Starting behavior
Attention:Safety contacts switch immediately when
the power supply is connected.
Fig. 8: Manual start. Fig. 9: Automatic start (e.g. for applications with
a safety door).
Feedback loop
Fig. 10: Feedback loop. Monitoring of externally
connected contactors or expansion mod-
ules.
Fig. 11: Feedback loop with automatic start. Mon-
itoring of externally connected contactors
or expansion modules.
Power supply and safety contacts
Fig. 12: Connection of the power supply to terminals
A1 and A2 (power supply according to the
technical data).
Fig. 13: Connection to switching loads on safety
contacts (example contact configura-
tion. Differing according to device type.
Switching voltages +V corresponding to
technical data).