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Electronic safety relays
Basic devices
2010
CA08103002Z-EN
www.eaton.comESR5
ESR5Basicdevices
Description
Functional safety on machines –
monitoring with safety relay ESR5
Moeller’s new ESR5 safety relays provide optimal safety and an extremely
high degree of reliability on plant and machinery. Applications that meet the
highest safety requirements in accordance with EN ISO 13849‐1 up to PL e, in
accordance with IEC 62061 up to SILCL 3 and in accordance with IEC 61508 up
to SIL 3 can be realized with the ESR5 series of devices.
Functionality
Safety relays are intended to reliably
monitor the signals from safety
devices at all times and switch off
quickly and reliably in an emergency.
Single-channel and dual-channel ver-
sions are available for the construc-
tion of safety-orientated applications.
The internal logic of the safety relay
monitors the safety circuits (Emer-
gency Stop, guard door…) and acti-
vates the enable paths in fault-free
condition. Upon actuation of the
safety device or in the event of a fault
the enable paths are switched off in
compliance with the stop category.
Any faults that occur in the control
circuit, such as a ground fault, cross
connection fault or wire breakage are
detected with certainty. Activation of
the enable paths is prevented in the
event of a fault.
Configuration
Universal use is achieved due to the
extensive performance range and
voltage range of the ESR5 safety
relays. The electronic safety relay
consists of the internal logic and two
redundant relays with positively
driven contacts for the enable and
signalling paths. The wiring is
effected simply on encoded plug-in
terminals. If any servicing is per-
formed, these ensure fault-free
replacement of the modules without
any additional wiring work.
Approvals
Safety relays ESR5 are approved
according to:
•
TÜV-Rheinland
•
UL/CUL
Advantages at a glance
•
Use for the highest safety
requirements inaccordancewith
EN ISO 13849‐1, IEC 62061 and
IEC 61508.
•
Devices suitable for the world
market thanks to certification
from UL, CUL and TÜV Rhineland.
•
Plug-in screw terminals for fast
and fault-free replacement.
•
Multi-voltage versions 24 - 230 V
AC DC for a flexible range of
application.
Emergency stop circuits
Allows the safe stopping of a
hazardous movement,
immediate stop for Stop
category 0 and controlled
stop Stop category 1
according to IEC 60204-1;
for use in single or dual
channel safety monitoring of
emergency stop circuits.
Guard door monitoring
Used with moving guards
such as doors, barriers or
flaps. Positions are reliably
detected, monitored and
enabled to safety-related
requirements.
Safe operation with
two-hand control
Type III to EN 574. Used for
hazardous machine move-
ment such as presses,
punching, shearing. It allows
the movement of dangerous
operation only when both
hands of the operator are
outside the dangerous area
and the two pushbuttons are
operated within 0.5 seconds
of each other.
Electro-sensitive
protective devices (ESPE)
Protection of the hazardous
location or area in the
vicinity of machines by
means of contactless
guards such as light grids/
light barriers/light curtains.
Off-delay circuit
Makes it possible to safely
stop a hazardous movement
with controlled stopping
according to lEC 60204-1 stop
category 1.
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