2
Operating Instructions
2-Hand Safety Relay ESM-2H2..
Electrical connection
f
When 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.
f
External fusing of the safety contacts must be
provided.
f
A maximum length of the control lines of 1,000 m
with a conductor cross-section of 0.75 mm² must
not be exceeded.
f
The conductor cross-section must not exceed
2.5 mm².
f
If 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
Control line T1
S12
Control line T1
S13
Control line T1
S21
Control line T2
S22
Control line T2
S23
Control line T2
X1, X2 Feedback loop
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 commissioning.
1. Wiring ESM-2H2.. to two-hand buttons:
Wire the ESM-2H2.. to the two-hand buttons as
per Fig. 5.
2. Wiring feedback loop:
If your application provides for external contactors
or expansion modules, connect them to the device
according to Fig. 6.
3. Wiring power supply:
Connect the power supply to terminals
A1
and
A2
Attention:
Wiring only in de-energized state.
4. Starting the device:
Switch the operating voltage on.
5. Switching to the operating status:
Actuate the two buttons
T1
and
T2
simultaneously,
or within 0.5 s.
The positively driven relays switch on.
6. Switching to the idle status:
Release the two buttons
T1
and
T2
.
The positively driven relays switch off.
What to do in case of a fault?
Device does not switch on:
f
Check the wiring by comparing it to the wiring
diagrams.
f
Check the two-hand buttons used for correct
function and adjustment.
f
Check the operating voltage at
A1
and
A2
.
f
Is the feedback loop closed or a jumper fitted?
Technical data
Parameter
Value
Version
ESM-2H201
ESM-2H202
ESM-2H203
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. 1.5 W
Approx. 3.7 VA
Control voltage at S12/S13 and S22/S23
DC 24 V
Control current (both buttons)
Approx. 2 x 40 mA
Release time of the safety relay after
releasing a button
< 20 ms
Response delay after actuation of the
buttons
< 20 ms
Synchronization time
< 0.5 s
Safety contacts
2 NO contacts
Max. switching voltage
AC 250 V
Breaking capacity
AC: 250 V, 1,500 VA, 6 A for ohm resistive load (6 operating cycles/minute)
250 V, 3 A for AC-15
DC: 24 V, 144 W, 6 A for ohm resistive load (6 operating cycles/minute)
24 V, 3 A, for DC-13
Minimum contact load
24 V, 20 mA
Contact fuses
10 A gG
Conductor cross-section
0.14 - 2.5 mm²
Max. length of control cable
1,000 m with 0.75 mm²
Contact material
AgSnO
2
Mech. contact life
Approx. 1 x 10
7
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-2H2
1)
Load (DC-13; 24 V)
≤ 0.1 A
≤ 1 A
≤ 3 A
n
op
≤ 400,000 cycles
≤ 100,000 cycles
≤ 22,500 cycles
T
10D
20 years
Category
4
PL
e
PFH
D
1.2 x 10
-8
1/h
1) Additional data can be requested from the manufacturer for applications that deviate from these conditions.
Device cannot be switched on again after an
emergency stop:
f
Check the two-hand buttons used for correct
function.
f
Check the wiring (short circuits or similar?)
f
Is 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
:
+49 711 7597-500
:
support@euchner.de
Internet
:
www.euchner.com
