1
Safety
Technology
& Innovation
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Earth fault monitoring
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Indication of the switching state via LED
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Up to PL e, SILCL 3, category 4
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It is not allowed to open the device, tamper with the de-
vice or bypass the safety devices.
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All relevant safety regulations and standards are to be
observed.
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The overall concept of the control system in which the
device is incorporated must be validated by the user.
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Failure to observe the safety regulations can result in
death, serious injury and serious damage.
Correct Use The SR105E contact block in combination with any basic device
from the OMRON STI SR series can be used to produce up to
three additional safety contact paths per device. An existing
system can thus be expanded practically indefinitely in a modu-
lar manner. Activation takes place via a safety contact of the
basic device. The SR105E provides signaling contacts for fault
monitoring. The devices can be used in systems up to safety
category 4, PL e.
Features
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3 safe, redundant relay outputs
1 auxiliary contact (fault monitoring)
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Activation via basic device from the OMRON STI SR
series
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Modular, freely configurable safety system
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Fault monitoring by basic device
Function
The safety expansion contact block SR105E in combination
with a basic device from the OMRON STI SR series is
designed for safe isolation of safety circuits according to
EN 60204-1 and can be used up to safety category 4, PL e
according to EN ISO 13849-1.
Terminal S11 (DC 24V control voltage) is connected with
terminals S15 and S16 via the safety contacts of the basic
device. Starting the basic device also activates the
SR105E. The basic device disconnects the control voltage
when the safety switch is operated, and the safety contacts
of the SR105E open immediately.
If a fault occurs in the SR105E, this is detected by the basic
device via terminals S23 and S24.
Independent operation without basic device is not
possible .
Electrical
Connection
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When the 24 V version is used, a control transformer
according to EN 61558-2-6 or a power supply unit with
electrical isolation from the mains must be connected.
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External fusing of the safety contacts (4 A slow-blow or 6
A quick-action or 10 A gG) must be provided.
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A maximum length of the control lines of 1000 meters
with a line cross section of 0.75 mm
2
must not be ex-
ceeded.
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The line cross section must not exceed 2.5 mm
2
.
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If the device does not function after commissioning, it
must be returned to the manufacturer unopened. Open-
ing the device will void the warranty.
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PE (protective earth) must be connected to terminal S10
on the AC 115/230V variant. Wiring of the overall device
is to be designed for 115/230V.
Installation
As per EN 60204-1, the device is intended for installation in
control cabinets with a minimum degree of protection of
IP54. It is mounted on a 35-mm DIN rail according to DIN
EN 60715 TH35.
Safety
Precautions
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Installation andcommissioningofthe device must be
performed only by authorized personnel .
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Observe the country-specific regulations when installing
the device.
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The electrical connection of the device is only allowed to
be made with the device isolated.
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The wiring of the device must comply with the instruc-
tions in this user information, otherwise there is a risk
that the safety function will be lost.
Fig. 1 Block diagram SR105E
Fig. 2 Installation / removal
Fig. 3Connections
A1: Power supply
A2 : Power supply
S11: DC 24V control voltage
S10: control line
S15: control line
S16: control line
S23: Fault monitoring
S24: Fault monitoring
13-14: Safety contact 1
23-24: Safety contact 2
33-34: Safety contact 3
(not for the plug-in terminals)
SR105E
User Information for SR105E
