ISB SR4001 User manual

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Introduction
This operating instruction should make
you familiar with the SR4001 safety relay
(Part ISB-SR-22-4001) for safety light
curtains.
The operating instruction is addressed to
the following persons:
•Skilled personnel who plan or
develop safety equipment for
machines and plants and are familiar
with the safety instructions and safety
regulations.
•Skilled personnel who integrate
safety equipment into machines and
plants and activate them.
Explanation of symbols
The operating instruction contains several symbols which are
used to highlight important information:
This symbol shows text passages which should absolutely
be paid attention to. Non-observance leads to serious
injuries or damage to property.
This symbol shows text passages which contain important
information.
This symbol is placed for activities.
© Copyright All rights reserved. Changes, which serve technical
improvements are reserved.
Safety indications
Intended application:
The safety relay SR4001 can be used in applications together
with:
•Electro sensitive protective equipment (ESPE) type 4 (light
curtains).
•Electro sensitive protective equipment (ESPE) type 2 (light
curtains) performing self test.
When using the SR4001 in conjunction with any light
curtain, the monitoring of the start button will not be
single error protected.
If fail safe on the monitored start button according to
risk analysis is required (e.g. if it is possible to stand
behind a machine), we recommend the use of
additional safety measures.
Operator and object protection is not guaranteed, if the
safety relay is not being used according to its intended use.
Please note the following points for your safety:
•The device may only be integrated and operated by
specialized staff, who are familiar with this instruction and
the current regulations for safety at work and accident
prevention.
•Working on electrical equipment is only allowed for
specialized staff.
•Pay attention to applicable regulations, particularly in
reference to preventive measures.
•The danger area must be observable from the installation
location of the start button.
•Starting the machine must not be possible from the danger
area.
•Any repairs have to be done by the manufacturer or a
person which is authorized by the manufacturer. It is
prohibited to open the device or implement unauthorized
changes, otherwise any warranty expires. Avoid
mechanical vibrations greater than 5 g / 33 Hz while
transporting and during operation.
• The SR4001 should be panel mounted in an enclosure
rated at IP 54 or better Dust and dampness could lead to
malfunction.
•Adequate fuse protection must be provided on all output
contacts with capacitive and inductive loads.
ISB-SR-22-4001-Manual-007.pdf SR4001 Safety Relay (Manual Part 60-4001) 1/4
Operating Instructions for the SR 001 Safety Relay

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Assembly and function (block diagram)
A1,A2 Power input
13-14, 23-24, 33-34 Safety circuits (normally open)
Y1-Y2 Start button
S12, S22 Inputs for the ESPE outputs
BR1-BR2 With bridging BR1 and BR2
automatic activation is possible.
Before using the device, it must be
decided whether version with or without
monitoring the start button should be
used. The version without start control
needs bridges between BR1 - BR2 and
Y1 - Y2.
A supply voltage must be applied at the
terminals A1 and A2 in order to operate
the device. Both LED’s, “Power” and
“Interlock” should turn on. A voltage of
24V DC will be available at Terminal
S11 to be used with S12 and S22.
Terminals S12 and S22 must be
connected according to the application
examples.
To START the SR4001, terminal Y1 and
Y2 must be bridged with a normally
open contact. The unit works if you
close this contact.
Thereafter the contacts 13-14, 23-24
and 33-34 are closed. The LED’s Power,
Channel 1 and Channel 2 illuminate.
The Interlock LED does not light up.
In series to the START-button, an
external contactor or expansion module
such as ISB-EM-22-4002 can be
monitored (see application example 3).
Mounting and operation
Mechanical mounting
For safe functioning the safety relay must be
built into a dust and humidity-protected
housing with an IP rating of IP54 or higher.
There is a notch on the rear of the SR4001 for
DIN Rail attachment.
Electric connection
Connect the relay according to the application examples.
In general the safety-relay has to be wired according to the
following specifications:
1. Wiring the feedback control loop and the activation circuit
Automatic activation:
Bridge Y1 - Y2,
Bridge BR1 - BR2
Conditional activation:
Connect START-button to Y1
and Y2 terminals.
(Do not bridge BR1 and BR2
or Y1 and Y2).
Conditional activation with
expansion module:
N.C. contacts of external
contactors have to be wired in
series with the START-button
to terminals Y1 and Y2. (Do
not bridge BR1 and BR2 or Y1
and Y2).
ISB-SR-22-4001-Manual-007.pdf SR4001 Safety Relay (Manual Part 60-4001) 2/4

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2. Wiring the input circuit
ESPE with relay outputs: connect contacts of ESPE
receiver to S22-S11 and S12-S11.
ESPE with semiconductor outputs: Connect PNP-
outputs of ESPE receiver to S22 and S12.
* We recommend to provide the light curtain and the
safety relay with the same power supply. If this is not
possible and the devices have to be connected to
galvanically isolated power supplies, there must be a
bridge between GND of ESPE and A2 (-) of the safety
relay. (ATTENTION: Use the bridge only with
galvanically isolated power supplies.)
3. Supply voltage 24V DC
The Supply voltage has to be connected to the
terminals A1 and A2.
Using DC: 24V to A1
and GND to A2
Please note the maximum lengths of the connection cables.
It is not allowed to add additional load at the terminal S11.
Maintenance and repair
The safety relay is maintenance free.
To replace the device, we advise to detach the wires one by one
and attach them to the alternate device.
1. Switch off power supply and detach wiring from
defective device.
2. Remove the defective device from DIN Rail.
3. Mount new device on the DIN Rail and attach
wiring.
4. Restore power.
Faults, effect and measures
•Earth Fault
on AC/DC-version:
An electronic fuse is tripped and the
output contacts opened. Once the
reason of the disturbance is removed
and the rated voltage is observed, the
device is ready for operation.
•Malfunction of contacts:
In the case of welded contacts,
further activation is not possible
following an opening of the input
circuit.
•Only one or no
LED illuminates:
An external wiring fault or an internal
fault is present. Test the external
wiring, if the fault is still present,
contact ISB.
ISB-SR-22-4001-Manual-007.pdf SR4001 Safety Relay (Manual Part 60-4001) 3/4

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Application examples
Example 1: Dual-channel monitoring of light curtains
(ESPE with relay outputs).
Pressing the START-button, the SR4001 will be activated.
Contacts 13-14, 23-24 and 33-34 close.
An interruption of the light beam will reset the contacts.
Up to category 3; SIL2; PLd reachable
Example 2: Dual-channel monitoring of light curtains
(ESPE with semiconductor outputs and short circuit
monitoring).
Pressing the START-button, the SR4001 will be activated.
Contacts 13-14, 23-24 and 33-34 close. An interruption of the
light beam will reset the contacts
Up to category 4; SIL3; PLe reachable
Example 3: Dual-channel monitoring of light curtains
with external contact extension
(2 contactors).
This application uses two external contactors with positive
guidance. One normally closed contact of each of the external
contactors must be connected in series to the START-button to
the terminals Y1 and Y2. Through the switch S ext. the external
contactors can be operated or turned off at any time if the
SR4001 is activated. To avoid cross connection, the external
contactors should be wired with separate cable sheaths.
Up to category 4; SIL3; PLe reachable
ISB (Head office)
2300 Victoria Ave Lachine, QC, Canada H8S 1Z3
1-866-ISB-LITE (1-866- 72-5 83)
www.isblite.com
ISB-SR-22-4001-Manual-007.pdf SR4001 Safety Relay (Manual Part 60-4001) 4/4
Technical Data
Electrical data
Supply voltage 24 V DC (electronic fuse)
Voltage range 0,90 ...1,1 UB
Frequency (AC-type)
Power consumption appr. ca. 2,5 W
Starting current S12, S22 390 mA
Permanent current S12, S22 20 mA
Conductor data
Conductor connection 2 x 2,5 mm2 solid wire
DIN VDE 0295
2 x 1,0 mm2 strand with hull
DIN VDE 46228
Use 60/75°C copper wire only!
Max. conductor length (input
circuit) 100 m Every conductor
Conductor cross-section 2 x 1,5 mm2
Capacity 150 nF/km
Resistance 11,7 Ohm/km
Temperature + 25° C
Contact data
Contact allocation 3 normally open
Contact type Positive guided relay
Contact material AgSnO2 or comparable
Switching voltage 24V DC
Switching current 6 A
Max. switching capacity 1500 VA (ohm load)
Mechanical lifetime 107 Switches
Electrical lifetime 105 Switches
Creeping distance and clearance - DIN VDE 0110 DIN VDE 0160
at pollution grade 2,
- basis isolation:
over voltage category 3
- protective separation:
over voltage category 2
Contact security 6,3 A surge or 4 A continuous
DIN VDE 0660 part 200
Voltage on S11 24 V DC
Delay on de-energisation K1 < 30 ms
Mechanical data
Housing material PA 6.6
Dimensions
( w x h x d ) [ mm ] 22,5 x 114,5 x 99
Fastening Click fastening for DIN Rail
Max. tightening torque 0,4 Nm (Tighten to 1 Nm
Overtorquing may cause enclosure
breakage.)
Weight with terminals Max. 220 g
Storage In dry areas
Environmental data
Operating temperature -25° C ... +55° C
Terminal type IP 20 DIN VDE 0470 Part 1
Housing type IP 40 DIN VDE 0470
Shock resistance 5 g, 33 Hz VDE 0160
Certifications
Tested in accordance with EN ISO 13849-1
Achieved level/category Performance Level e , Cat.4
MTTFd [years] 36,16 “high”
DC 99% “high”
CCF Achieved