TE Connectivity SRSE-2NO Installation and operating instructions

SRSE-2NO SAFETY RELAY MODULE
Installation, use and maintenance guide

SRSE-2NO SAFETY RELAY MODULE
2 INDUSTRIAL/SRSE-2NO SAFETY RELAY MODULE
SAFETY RELAY
SRSE-2NO
INSTALLATION USE AND MAINTENANCE
TABLE OF CONTENTS
SRSE-2NO SAFETY RELAY MODULE..............................................................................1
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 (mm) .................................................................................................................11
INDICATIONS AND INFORMATION FOR ENVIRONMENTAL PROTECTION ...............12

SRSE-2NO SAFETY RELAY MODULE
INDUSTRIAL/SRSE-2NO SAFETY RELAY MODULE 3
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 SRSE-2NO safety relay is able to monitor two inputs coming from safety gate, safety guard or similar
(two channels electromechanical safety switch).
The SRSE-2NO 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

SRSE-2NO SAFETY RELAY MODULE
4 INDUSTRIAL/SRSE-2NO SAFETY RELAY MODULE
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 SRSE-2NO 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).

SRSE-2NO SAFETY RELAY MODULE
INDUSTRIAL/SRSE-2NO SAFETY RELAY MODULE 5
ELECTRICAL CONNECTIONS
Figure 3
SRSE-2NO is provided with terminal blocks for the electrical
connections.
The unit provides 16 terminals.
Terminal tightening torque: 5 to 7 lb-in (0,6 to 0,7 Nm).
Install SRSE-2NO 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 SRSE-2NO 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 to 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).

SRSE-2NO SAFETY RELAY MODULE
6 INDUSTRIAL/SRSE-2NO SAFETY RELAY MODULE
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 SRSE-2NO safety relay Module is able to detect in real time the faults.
To support proper operation of the system 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 SRSE-2NO to the Omega rail.
❒
3. Verify that all the LEDs (indicators) light on correctly.
❒
4. Verify the positioning of all the actuators connected to SRSE-2NO.
❒
5. Verify that all the external indicators (lamps) work properly.
❒
Table 2

SRSE-2NO SAFETY RELAY MODULE
INDUSTRIAL/SRSE-2NO SAFETY RELAY MODULE 7
INPUT AND OUTPUT
THE RESTART COMMAND
The RESTART command allows SRSE-2NO 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 SRSE-2NO 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 external contactors K1-K2 to the reset time of SRSE-2NO.
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 required by the application, 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.

SRSE-2NO SAFETY RELAY MODULE
8 INDUSTRIAL/SRSE-2NO SAFETY RELAY MODULE
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 enable correct insulation and to significantly reduce potential 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.

SRSE-2NO SAFETY RELAY MODULE
INDUSTRIAL/SRSE-2NO SAFETY RELAY MODULE 9
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

SRSE-2NO SAFETY RELAY MODULE
10 INDUSTRIAL/SRSE-2NO SAFETY RELAY MODULE
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
Around 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 to 30VDC
Input number/data (type 2)
1 / according to standard EN61131-2, type 2
Input current
Typical 10mA
Input voltage
0VDC to 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 to 55°C
Max surrounding air temperature
55°C
Storage temperature
-30 to 70°C
Relative humidity
10% to 95%
Maximum operating altitude
2000m
Vibration resistance (CEI EN 60068-2-6:2009)
+/- 1.5 mm 9 to 200 Hz
Bump resistance (CEI EN 60068-2-27:2012)
15 g (6 ms half-sine)