Reer SR ZERO A Quick start guide

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Installation use and maintenance
Safety Relay Module
(Original instructions)

SAFETY RELAY SR ZERO A
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SAFETY RELAY
SR ZERO A
INSTALLATION USE AND MAINTENANCE
TABLE OF CONTENTS
OVERVIEW ........................................................................................................................................3
INSTALLATION AND ELECTRICAL CONNECTIONS................................................................4
INSTRUCTIONS CONCERNING CONNECTION CABLES....................................................................... 4
PINOUT ....................................................................................................................................................... 5
CHECKLIST AFTER INSTALLATION......................................................................................................... 5
CHARACTERISTICS OF THE OUTPUT CIRCUIT...................................................................................... 9
STATUS INDICATORS.....................................................................................................................9
TECHNICAL DATA ........................................................................................................................ 10
DIMENSIONS............................................................................................................................................ 11
INDICATIONS AND INFORMATION FOR ENVIRONMENTAL PROTECTION ................. 12
WARRANTY.................................................................................................................................... 13
EC DECLARATION OF CONFORMITY...................................................................................... 14

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OVERVIEW
This symbol indicates an important personal safety warning. Failure to comply with the
warning may result in very high risk for exposed personnel.
➔This symbol indicates an important instruction.
The SR ZERO A is a safety relays expansion used to connect the machine safety circuit to
2 OSSD output devices i.e.:
•photoelectric light curtain
•laser scanner
•RFID sensor
See details below about light curtain models, wiring, etc.
When deciding on the safety category to be adopted, carefully consider the risks analysis of
the machine.
The module has been designed in particular for the ReeR light curtains of the Admiral AX
(category 4), Vision VX and Vision VXL/MXL (category 2) series, EOS, Magnus RFID sensor and
ReeR laser scanner. Consult ReeR before using the interface with other light curtain models
or safety devices.
For safe use of the device, it is essential to read and understand the contents of this
handbook.
Failure to comply with the prescriptions indicated in this notice may result in very high risks
for the operating personnel of the protected machine.

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INSTALLATION AND ELECTRICAL CONNECTIONS
SR ZERO A is provided with terminal blocks for the electrical connections.
The unit provides 16 terminals.
➔Terminal tightening torque: 5...7lb-in (0,6...0,7 Nm).
Install SR ZERO A in an enclosure with a protection class of at least IP54.
Connect the safety relay module when it is not powered.
The supply voltage to the units must be 24 20% VDC; PELV (in compliance
with the standard EN 60204-1 (Chapter 6.4)).
Do not use the SR ZERO A to supply external devices.
The same ground connection (0VDC) must be used for all system components.
INSTRUCTIONS CONCERNING CONNECTION CABLES.
➔Wire size range: AWG 12...30, (solid/stranded) (UL).
➔Use 60/75°C copper (Cu) conductor only.
➔We recommend the use of separate power supplies for the safety relay and for other
electrical power equipment (electric motors, inverters, frequency converters) or other
sources of disturbance.
➔Cables used for connections longer than 50m must have a cross-section of at least 1mm2
(AWG16).
➔The path of the connection cables between the safety relay and the sensors, the connection
referring to the feedback contact must be different from that of other power cables.
Figure 1

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PINOUT
TERMINAL
NUMBER
SIGNAL NAME
TYPE OF
SIGNAL
DESCRIPTION
1
-
-
Not used
2
-
-
Not used
3
-
-
Not used
4
0VDC
-
Power Supply 0VDC
5
INPUT1
Input
Safety input 1
6
INPUT2
Input
Safety input 2
7
K1 K2 FBK IN
Input
Feedback K1 K2 Input
8
K1 K2 FBK OUT
Output
Feedback K1 K2 Output
9
-
-
Not used
10
-
-
Not used
11
B NO1
Output
Safety relay B, contact 1 (N.O.)
12
B NO2
Output
Safety relay B, contact 2 (N.O.)
13
-
-
Not used
14
-
-
Not used
15
A NO1
Output
Safety relay A, contact 1 (N.O.)
16
A NO2
Output
Safety relay A, contact 2 (N.O.)
Table 1
CHECKLIST AFTER INSTALLATION
To guarantee the system perfect operation perform the following checks at start up and
at least every year:
OPERATION / CONTROL
COMPLETE
1. Verify the correct fixing of SR ZERO A to the Omega rail.
❒
2. Verify that all the cables are correctly inserted and the terminal blocks well screwed.
❒
3. Verify that the led (indicator) lights on correctly.
❒
4. Verify the positioning of all the sensors connected to SR ZERO A.
❒

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Example of connection of the SR ZERO A module with
safety light curtain SAFEGATE S (low range operation)
Figure 2
Example of connection of the SR ZERO A module with AX / VX / VXL safety light curtain in
AUTOMATIC operation mode
Figure 3

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Example of connection of the SR ZERO A module with AX / VX / VXL safety light curtain in
MANUAL operation mode
Figure 4
Example of connection of the SR ZERO A module with MXL safety light curtain in
AUTOMATIC operation mode
Figure 5

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Example of connection of the SR ZERO A module with MXL safety light curtain in
MANUAL operation mode
Figure 6
Example of connection of the SR ZERO A module with EOS4X safety light curtain in
AUTOMATIC operation mode
Figure 7
➔Further details regarding connections can be found on each curtain technical manual.

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CHARACTERISTICS OF THE OUTPUT CIRCUIT
For the output circuit, the safety relay uses two guided contact safety relays.
These relays are rated by the manufacturer for voltage and current values above those
indicated in the technical data; however, to assure correct insulation and to avoid damage
or premature aging, protect each output line with an appropriate fuse (depending on the
load). Check that load characteristics comply with the indications given in the table below.
Minimum switching voltage
18 VDC
Minimum switching current
20 mA
Maximum switching voltage
250 VAC
Maximum switching current
6 A (AC) / 6 A (DC)
STATUS INDICATORS
LED
COLOR
STATUS/COLOR
CONDITION
IN
Green
ON
ON with input activated
OFF
OFF with input not activated
Table 2
Figure 8

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TECHNICAL DATA
SAFETY DATA
VALUE
STANDARD
Safety level
SIL 3
EN 61508:2010
SILCL 3
EN 62061:2005 / A2:2015
Cat.4
EN ISO 13849-1: 2015
Device lifetime
20 years
EN ISO 13849-1: 2015
Certifications
cULus, TÜV
Load
Number of Commutations
PFHd *
DCavg #
MTTFd #
(years)
PL #
CCF #
2A@230Vac
1 every 30s
1,71E-07
98,94%
27,04
d
80%
1 every min
8,74E-08
98,88%
54,05
e
80%
1 every hour
4,99E-09
92,16%
3022,39
e
80%
1 every day
3,68E-09
45,25%
23745,23
e
80%
0,5A@24VDC
1 every 30s
3,40E-07
98,97%
13,52
d
80%
1 every min
1,71E-07
98,94%
27,04
d
80%
1 every hour
6,39E-09
95,46%
1565,28
e
80%
1 every day
3,77E-09
62,11%
16296,27
e
80%
* EN 61508:2010, EN 62061:2005/A2:2015; # EN ISO 13849-1: 2015
ELECTRICAL PARAMETERS
VALUE
Power supply
24 20% VDC; PELV
Rated impulse between PELV and relay contacts
6 kV
Power requirement
1,5 W max
INPUT DATA
Inputs number
2 internal coil relays
Number of EDM input
1 NC contact
OUTPUT DATA
Number of safety output
2 N.O. contacts
Type
Relays with forced guided contacts
Max switching voltage
250VAC , 125 VDC, Overvoltage Category III
Max switching current
6A (AC), 6A (DC)
Max switching power
1500VA, 180W (85W if load voltage >30 VDC)
Max Response time
20ms
Mechanical service life
10 x 10E6
Electrical service life AC1 at 360 switchings/h
> 10E5
CONNECTIONS / OPERATION
Connections
16 Terminal blocks with protection
against reversal of polarity
Status indicator
Input status LED
Max. length of connections
100m
Operating temperature
-30...55°C
Max surrounding air temperature
55°C
Storage temperature
-30...70°C
Relative humidity
10%...95%
Maximum operating altitude
2000m
Vibration resistance (CEI EN 60068-2-6:2009)
+/- 1.5 mm 9...200 Hz
Bump resistance (CEI EN 60068-2-27:2012)
15 g (6 ms half-sine)
ENCLOSURE DATA
VALUE
Description
Electronic housing 16 pole, with locking latch mounting
Enclosure protection rating
IP 20
Terminal block protection rating
IP 2X
Fastening
Fast attachment to rail according to CEI EN 60715
Dimensions (h x w x d)
99mm x 22,5mm x 113,5mm
Weight
150g

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DIMENSIONS
Figure 9
(All dimensions are expressed in mm

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INDICATIONS AND INFORMATION FOR ENVIRONMENTAL PROTECTION
Dispose of the product in an eco-compatible manner and in accordance with national legislation.
For Countries in the European Union:
Pursuant to the Directive no. 2012/19/EU on waste electrical and electronic equipment
(WEEE).
The crossed out wheelie-bin symbol on the equipment or its packaging means that when the
product reaches the end of its useful life it must be collected separately from other waste.
Proper separate collection of the discarded equipment for later environment-friendly recycling,
processing, and disposal, helps to avoid any negative impact on the environment and health and
encourages re-use and recycling of the materials the equipment is made of.
In each individual Member State of the European Union this product is required to be disposed of
in accordance with Directive 2012/19/EU as implemented in the Member State where the product
is disposed of.
For further information please contact ReeR or your local dealer.

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WARRANTY
REER warrants that each SR ZERO A unit in new ex-factory condition, in conditions of
normal use, is free of defects in the materials and of manufacturing defects for a period
of 12 (twelve) months.
In this period, REER undertakes to eliminate any faults in the product through repair or
replacement of the faulty parts, completely free of charge as regards material
and labor.
However, REER reserves the right to replace the entire faulty appliance with another
equivalent appliance or with the same characteristics instead of repairing this.
Validity of this warranty is regulated by the following conditions:
•The user must inform REER of the fault within twelve months from the date of
delivery of the product.
•The appliance and its components must be in the conditions in which they were
delivered by REER.
•The serial numbers must be clearly legible.
•The fault or defect has not been caused directly or indirectly by:
oImproper use;
oNon-compliance with instructions for use;
oCarelessness, inexperience, incorrect maintenance;
oRepairs, modifications, adaptations not carried out by REER personnel,
tampering, etc.;
oAccidents or impacts (also due to transportation or causes of force
majeure);
oOther causes not to be ascribed to REER.
Repairs will be carried out at the REER laboratories to which the material must be
delivered or dispatched: transport risks and the risks of any damage or loss of the material
during shipment are the responsibility of the user.
All products and components replaced become the property of REER.
REER does not recognize any other warranties or rights except for those specifically
described above; therefore, no claims for damages may be submitted for expenses,
interruption of business or other factors or circumstances in any way related to failure of
the product or of one of its parts.
Precise, complete compliance with all the rules, instructions and prohibitions indicated in this handbook is an
essential requirement for correct functioning of the safety relay.
REER s.p.a. therefore declines any responsibility for all and anything resulting from failure to comply, even partially,
with such indications.
Characteristics subject to change without notice. • Total or partial reproduction is forbidden without the prior authorization of REER.

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EC DECLARATION OF CONFORMITY

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All REER product manuals are available at URL https://www.reersafety.com/it/en/download/manuals