Reer SR E4 Quick start guide

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Installation use and maintenance
Safety Relay Module
(Original instructions)

SAFETY RELAY MODULE SR E4
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SR E4
SAFETY RELAY MODULE
TABLE OF CONTENTS
OVERVIEW ........................................................................................................................................3
OPERATING MODES.......................................................................................................................3
AUTOMATIC MODE................................................................................................................................... 3
MANUAL MODE......................................................................................................................................... 4
SIMULTANEITY CHECK............................................................................................................................................... 4
ELECTRICAL CONNECTIONS........................................................................................................5
INSTRUCTIONS CONCERNING CONNECTION CABLES....................................................................... 5
PINOUT ....................................................................................................................................................... 6
CHECKLIST AFTER INSTALLATION......................................................................................................... 6
INPUT AND OUTPUT................................................................................................................................. 7
THE RESTART COMMAND ........................................................................................................................................ 7
K1K2 FEEDBACK INPUT............................................................................................................................................. 7
SYSTEM STATUS OUTPUT......................................................................................................................................... 7
CHARACTERISTICS OF THE OUTPUT CIRCUIT ..................................................................................................... 8
USE OF K1 AND K2 AUXILIARY CONTACT ELEMENTS....................................................................................... 8
STATUS INDICATORS.....................................................................................................................9
NORMAL OPERATION.............................................................................................................................. 9
FAULT DIAGNOSIS..................................................................................................................................... 9
TECHNICAL DATA ........................................................................................................................ 10
DIMENSIONS............................................................................................................................................11
INDICATIONS AND INFORMATION FOR ENVIRONMENTAL PROTECTION ................. 12
WARRANTY.................................................................................................................................... 13
EC DECLARATION OF CONFORMITY...................................................................................... 14
UKCA DECLARATION OF CONFORMITY................................................................................ 15

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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 warning.
OVERVIEW
The SR E4 Safety Relay is able to monitor two inputs coming from safety gate, safety
guard or similar (two channels electromechanical safety switch).
The SR E4 module main features are the following:
•Input for Safety gate, Safety guard
•Restart manual or automatic selectable
•2 N.O. outputs with guided contact safety relays
•1 system monitor PNP output
•1 external contactors feedback input
OPERATING MODES
AUTOMATIC MODE
➔This mode is activated connecting the RESTART (terminal 4) directly to 24VDC.
In Automatic Mode, the outputs of the safety module follow the status of the safety relay
inputs (terminals 7, 8) coming from the safety guard:
•with the safety relay inputs active, the relay outputs of the safety module are active.
•with the safety relay inputs not active, the relay outputs of the safety module are
de-activated.
Figure 1 –Automatic operation with K1 K2 relays

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Use in manual mode (start/restart interlock activated) is mandatory in case the safety
device controls an access protecting a danger zone and once a person has passed
through the opening, he/she may remain in the danger zone without being detected.
Failure to comply with this rule may result in very serious risks for the persons
exposed.
When the K1-1 and K2-1 N.C. control contacts are not used (or no control is provided)
it is mandatory to connect the terminal 11 (K1 K2 FBK) to terminal 12 (SYS STATUS).
MANUAL MODE
With Manual Mode, the outputs of the safety relay are activated only if the safety relay
inputs (terminals 7, 8) are both active and after sending the RESTART signal to the relay
using the push-button or by means of a specific command on the RESTART input
(terminal 4) (please refer to “The RESTART command” section).
The RESTART command is active with a voltage of 24VDC.
If the RESTART signal is permanently connected to 24VDC the safety module relay
works in automatic restart mode.
* When pin 4 is permanently connected to 24VDC the module works in automatic restart mode
Figure 2 –Manual operation with K1 K2 relays
SIMULTANEITY CHECK
The SR E4 Safety Relay module is able to monitor two inputs coming from a safety gate,
safety guard or similar (two channels electromechanical safety switch).
Short circuit between the two channels or between the channels and 24VDC are detected
by means of the OUT TEST1, OUT TEST2 signals generated by the safety relay.
Between the two channels a simultaneity check is performed (within 1 sec).
➔If the simultaneity is not respected, the system remains in OFF with an alternate
flashing of the LEDs IN1 - IN2/FAIL. To reactivate the outputs, it is necessary to
open again and close INPUT1 and INPUT2 (respecting the simultaneity).

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ELECTRICAL CONNECTIONS
Figure 3
SR E4 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 E4 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 E4 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 controller 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).

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PINOUT
TERMINAL
NUMBER
SIGNAL NAME
TYPE OF
SIGNAL
DESCRIPTION
1
24VDC
-
Power supply 24VDC
2
0VDC
-
Power supply 0VDC
3
PE
-
Ground connection
4
RESTART
Input
Restart command
5
-
-
-
6
-
-
-
7
INPUT1
Input
Mechanical switch Input 1
8
INPUT2
Input
Mechanical switch Input 2
9
OUT TEST1
Output
Test output 1 for mechanical switch
10
OUT TEST2
Output
Test output 2 for mechanical switch
11
K1 K2 FBK
Input
Feedback external contactors K1K2
12
SYS STATUS
Output
Output status
13
B NO1
Output
Safety relay B, contact 1 (N.O.)
14
B NO2
Output
Safety relay B, contact 2 (N.O.)
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
The SR E4 Safety Relay Module is able to detect in real time the faults.
To guarantee the system perfect operation perform the following checks at start up and
at least every year:
OPERATION / CONTROL
COMPLETE
1. Verify that all the cables are correctly inserted and the terminal blocks
well screwed.
❒
2. Verify the correct fixing of SR E4 to the Omega rail.
❒
3. Verify that all the LEDs (indicators) light on correctly.
❒
4. Verify the positioning of all the actuators connected to SR E4.
❒
5. Verify that all the external indicators (lamps) work properly.
❒
Table 2

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INPUT AND OUTPUT
THE RESTART COMMAND
The RESTART command allows SR E4 to manage Manual operation.
The RESTART command must be installed outside the danger area in a position where
the danger area and the entire work area concerned are clearly visible.
It must not be possible to reach the control from inside the danger area.
➔The RESTART command must be sent to SR E4 connecting
terminal 4 to 24VDC.
➔The contact used for the RESTART command must be able
to switch a voltage of 24VDC and a current of 10mA
(guaranteeing a closing time>100ms).
➔The whole SYSTEM RESET TIME is obtained adding the
reset time of any external contactors K1-K2 to the reset
time of SR E4.
t>100ms
K1K2 FEEDBACK INPUT
Using the K1 and K2 auxiliary safety contactors with guided contact safety type, it is
necessary to connect the +24VDC to the K1 K2 FBK through the series of the K1-1 and
K2-1 N.C. control contacts.
➔The control of the correct switching of K1 and K2 is performed with a delay of
300ms.
If the application requires it, the response time of the external contactors must be
verified by an additional device.
When the K1-1 and K2-1 N.C. control contacts are not used (or no control is provided)
it is mandatory to connect the terminal 11 (K1K2 FEEDBACK) to terminal 12 (SYSTEM
STATUS).
SYSTEM STATUS OUTPUT
The SYSTEM STATUS output reports exactly the output safety relays condition:
•When the output relays are opened, the SYSTEM STATUS reports 0VDC.
•When the output relays are closed, the SYSTEM STATUS reports +24VDC.

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CHARACTERISTICS OF THE OUTPUT CIRCUIT
For the output circuit, the safety relay module 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
6A(AC) / 6A(DC)
USE OF K1 AND K2 AUXILIARY CONTACT ELEMENTS.
For loads with higher voltage and current characteristics than those indicated in the table
above, use of auxiliary external relays or contactors suitable for the load to be controlled
is recommended.
•The K1 and K2 auxiliary contactors or relays must be of the guided contact safety
type.
•Referring to the table below, pay particular attention to the configuration of the
control contacts on terminal 11 and that of the contacts of use.
Auxiliary Relay K1
Auxiliary Relay K2
Control contacts
K1-1 normally closed
K2-1 normally closed
Use contacts
K1-2 normally open
K2-2 normally open
•Control contacts K1-1 and K2-1 (terminal 11) must be able to switch a current of
10mA and a voltage of 24VDC.

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STATUS INDICATORS
NORMAL OPERATION
LED
COLOR
STATUS/COLOR
CONDITION
IN1
Green
ON
Input contact1 CLOSED
OFF
Input contact1 OPEN
IN2/
FAIL
Red
Green
RED
Fault detected
GREEN
Input contact2 CLOSED
OFF
Input contact2 OPEN
GUARD/
BREAK
Green
Red
Yellow
RED
Output relays opened
RED blinking
The number of blinks show the type
of FAIL (only with red FAIL led ON)
GREEN
Output relays closed
YELLOW
Input ON, Output OFF
and waiting for Restart
IN1/IN2
Green
Blinking alternately
Wrong simultaneity check detected
Table 3
➔The max Simultaneity check value will be 1 sec.
➔Please refer to the “SIMULTANEITY CHECK”section for a detailed explanation of
this check.
➔Please refer to the "FAULT DIAGNOSIS" section for a detailed explanation of the
detected fault.
FAULT DIAGNOSIS
LED
MEANING
IN1
IN2/FAIL
GUARD/BREAK (RED led pulses)
OFF
RED
(2 pulses)
▪Possible fault of
Microcontroller board
OFF
RED
(3 pulses)
▪Internal relays fault
OFF
RED
(4 pulses)
▪K1K2 external relays
fault
OFF
RED
(5 pulses)
▪User configuration
failure
OFF
RED
(6 pulses)
▪User configuration
changed without
system restart
OFF
RED
(7 pulses)
▪Possible overload or
▪SYSTEM STATUS
connection error
Table 4

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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
1,73E-07
99,00%
25,05
d
80%
1 every min
8,90E-08
99,00%
46,65
e
80%
1 every hour
6,60E-09
98,98%
306,21
e
80%
1 every day
5,29E-09
98,97%
335,91
e
80%
0,5A@24VDC
1 every 30s
3,41E-07
99,00%
13,01
d
80%
1 every min
1,73E-07
99,00%
25,05
d
80%
1 every hour
7,99E-09
98,98%
279,82
e
80%
1 every day
5,38E-09
98,97%
333,75
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
3W max
Protection
Overload protected STATUS output
INPUT DATA
VALUE
Input number/data (type 3)
3 / according to standard EN61131-2, type 3
Input current
Typical 4.3mA
Input voltage
0VDC…30VDC
Input number/data (type 2)
1 / according to standard EN61131-2, type 2
Input current
Typical 10mA
Input voltage
0VDC…30VDC
Number of EDM input
1 N.C. contact
EDM Response time
300ms
OUTPUT DATA
VALUE
Output test (number/data)
2 / 100mA@24VDC
System Status Output
100mA@24VDC
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 >30Vdc)
Max Response time
20ms
Mechanical service life
10 x 10E6
Electrical service life AC1 at 360 switchings/h
> 10E5
CONNECTIONS / OPERATION
VALUE
Operating modes
Automatic or Manual selectable
Connections
16 Terminal blocks with protection against reversal of polarity
Status indicators
Led: Input status –Output status –Fail
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)