Reer SR E4C Kurzanleitung

8541414 - 19/09/2022 Rev.1

Installation use and maintenance

Safety Relay Module

(Original instructions)

 SAFETY RELAY MODULE SR E4C 
 
2 8541414 - 19/09/2022 Rev.1 
English 
 
SR E4C 
SAFETY RELAY MODULE 
 
TABLE OF CONTENTS 
 
OVERVIEW ........................................................................................................................................3 
OPERATING MODE .........................................................................................................................3 
MANUAL MODE......................................................................................................................................... 3 
SIMULTANEITY CHECK............................................................................................................................................... 4 
ELECTRICAL CONNECTIONS........................................................................................................5 
INSTRUCTIONS CONCERNING CONNECTION CABLES....................................................................... 5 
PINOUT ....................................................................................................................................................... 6 
CHECKLIST AFTER INSTALLATION ......................................................................................................... 6 
INPUT AND OUTPUT................................................................................................................................. 6 
THE RESTART COMMAND ........................................................................................................................................ 6 
K1K2 FEEDBACK INPUT............................................................................................................................................. 7 
SYSTEM STATUS OUTPUT......................................................................................................................................... 7 
CHARACTERISTICS OF THE OUTPUT CIRCUIT ..................................................................................................... 7 
USE OF K1 AND K2 AUXILIARY CONTACT ELEMENTS....................................................................................... 7 
STATUS INDICATORS.....................................................................................................................8 
NORMAL OPERATION.............................................................................................................................. 8 
FAULT DIAGNOSIS..................................................................................................................................... 8 
TECHNICAL DATA ...........................................................................................................................9 
DIMENSIONS............................................................................................................................................10 
INDICATIONS AND INFORMATION FOR ENVIRONMENTAL PROTECTION................. 11 
WARRANTY.................................................................................................................................... 12 
EC DECLARATION OF CONFORMITY...................................................................................... 13 
UKCA DECLARATION OF CONFORMITY................................................................................ 14 
 
 

SAFETY RELAY MODULE SR E4C

8541414 - 19/09/2022 Rev.1 3

English

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 E4C Safety Relay is able to monitor two inputs coming from safety gate, safety

guard or similar (two channels electromechanical safety switch).

The SR E4C module main features are the following:

•2 input able to monitor two external safety electromechanical safety switch

•2 N.O. outputs with guided contact safety relays

•Manual operation mode with Monitored Restart

•1 system status PNP output

•1 external contactors feedback input (EDM)

OPERATING MODE

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 “MONITORED RESTART MODE”section).

Figure 1

SAFETY RELAY MODULE SR E4C

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English

MONITORED RESTART MODE

In Monitored Restart 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).

➔The RESTART command must be sent to SR E4C

connecting terminal 4 to the 24VDC, respecting the

behaviour of the timing beside.

➔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 K1K2 to the

reset time of SR E4C.

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.

SIMULTANEITY CHECK

The SR E4C 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).

SAFETY RELAY MODULE SR E4C

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English

ELECTRICAL CONNECTIONS

Figure 2

SR E4C 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 E4C 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 E4C 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).

SAFETY RELAY MODULE SR E4C

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English

PINOUT

TERMINAL

NUMBER

SIGNAL NAME

TYPE OF

SIGNAL

DESCRIPTION

24VDC

Power supply 24VDC

0VDC

Power supply 0VDC

Ground connection

RESTART

Input

Restart command

INPUT1

Input

Mechanical switch Input 1

INPUT2

Input

Mechanical switch Input 2

OUT TEST1

Output

Test output 1 for mechanical switch

OUT TEST2

Output

Test output 2 for mechanical switch

K1 K2 FBK

Input

Feedback external contactors K1K2

SYS STATUS

Output

Output status

B NO1

Output

Safety relay B, contact 1 (N.O.)

B NO2

Output

Safety relay B, contact 2 (N.O.)

A NO1

Output

Safety relay A, contact 1 (N.O.)

A NO2

Output

Safety relay A, contact 2 (N.O.)

Table 1

CHECKLIST AFTER INSTALLATION

The SR E4C 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 E4C 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 E4C.

❒

5. Verify that all the external indicators (lamps) work properly.

❒

Table 2

INPUT AND OUTPUT

THE RESTART COMMAND

The RESTART command allows SR E4C to manage Manual operation. (Please refer to

“MONITORED RESTART MODE”section for a complete description of this command).

SAFETY RELAY MODULE SR E4C

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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.

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.

SAFETY RELAY MODULE SR E4C

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STATUS INDICATORS

NORMAL OPERATION

LED

COLOR

STATUS/COLOR

CONDITION

IN1

Green

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

SAFETY RELAY MODULE SR E4C

8541414 - 19/09/2022 Rev.1 9

English

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

Performance level

PL e

EN ISO 13849-1: 2015

PFHD

5,20E-09

EN 61508:2010

B10d

800.000

EN ISO 13849-1: 2015

MTTFD(Refer to table "RELAYS SAFETY DATA")

DCavg

99%

Device lifetime

20 years

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

80%

1 every min

8,90E-08

99,00%

46,65

80%

1 every hour

6,60E-09

98,98%

306,21

80%

1 every day

5,29E-09

98,97%

335,91

80%

0,5A@24VDC

1 every 30s

3,41E-07

99,00%

13,01

80%

1 every min

1,73E-07

99,00%

25,05

80%

1 every hour

7,99E-09

98,98%

279,82

80%

1 every day

5,38E-09

98,97%

333,75

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

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

Manual (monitored restart mode)

Connections

16 Terminal block 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)

SAFETY RELAY MODULE SR E4C

10 8541414 - 19/09/2022 Rev.1

English

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 22,6mm x 113,5mm

Weight

150g

DIMENSIONS

Figure 3

(All dimensions are expressed in mm)

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