Reer SR ONE Kurzanleitung

8541409 - 19/09/2022 Rev.1

Installation use and maintenance

Safety Relay Module

(Original instructions)

 
 
2 8541409 - 19/09/2022 Rev.1 
SAFETY RELAY MODULE SR ONE 
SR ONE 
SAFETY RELAY MODULE 
 
TABLE OF CONTENTS 
 
OVERVIEW ........................................................................................................................................3 
OPERATING MODES DESCRIPTION ...........................................................................................3 
AUTOMATIC MODE................................................................................................................................... 4 
MANUAL MODE......................................................................................................................................... 5 
CONNECTION OF EXTERNAL CONTACTORS K1 AND K2 .................................................................. 6 
ELECTRICAL CONNECTIONS........................................................................................................7 
INSTRUCTIONS CONCERNING CONNECTION CABLES....................................................................... 7 
PINOUT ....................................................................................................................................................... 8 
CHECKLIST AFTER INSTALLATION ............................................................................................8 
INPUT AND OUTPUT................................................................................................................................. 9 
THE RESTART COMMAND ........................................................................................................................................ 9 
SYSTEM STATUS OUTPUT......................................................................................................................................... 9 
CHARACTERISTICS OF THE OUTPUT CIRCUIT ..................................................................................................... 9 
USE OF K1 AND K2 AUXILIARY CONTACT ELEMENTS.....................................................................................10 
K1 K2 FEEDBACK INPUT (EDM) .............................................................................................................................10 
STATUS INDICATORS / FAULT DIAGNOSIS .......................................................................... 11 
NORMAL OPERATION............................................................................................................................11 
FAULT DIAGNOSIS...................................................................................................................................11 
TECHNICAL DATA ........................................................................................................................ 12 
DIMENSIONS............................................................................................................................................ 13 
INDICATIONS AND INFORMATION FOR ENVIRONMENTAL PROTECTION ................. 14 
WARRANTY.................................................................................................................................... 15 
EC DECLARATION OF CONFORMITY...................................................................................... 16 
UKCA DECLARATION OF CONFORMITY................................................................................ 17 
 
 

8541409 - 19/09/2022 Rev.1 3

SAFETY RELAY MODULE SR ONE

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 ONE Safety Relay module, connected to an EN 61496 –1/2 certified type 4 safety

light curtain and equipped with two auto-controlled PNP type solid-state outputs, is a

type 4 ESPE (Electro-sensitive Protective Equipment).

The other characteristics indicated above remaining constant, if the light curtain is type 2,

the entire ESPE will be type 2.

The SR ONE main features are the following:

•Inputs for the connection of Safety barrier with fail safe outputs

•Restart manual or automatic selectable

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

•1 System Status PNP output

•1 external contactors feedback input (EDM)

The safety module also guarantees that:

•The output lines are open if the connected device is in OFF status;

•The output lines are enabled only with correct response times;

•In manual mode, maintenance of the RESTART contact closed is not interpreted as

AUTO mode.

For safe use of the SR ONE module, it is essential to read and understand the contents of this

handbook.

Failure to comply with the prescriptions indicated in this handbook may result in very high

risks for the operating personnel of the machine protected.

OPERATING MODES DESCRIPTION

OPERATING MODES SELECTION

TERMINAL 5

TERMINAL 6

OPERATION

0 Vdc

+24 Vdc

Automatic

+24 Vdc

0 Vdc

Manual

0 Vdc

Non-permissible

conditions

+24 Vdc

Table 1

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SAFETY RELAY MODULE SR ONE

AUTOMATIC MODE

In this operating mode, the outputs of the safety module follow the status of the barrier:

•with the protected area free (outputs of the barrier active), the relay outputs

of the unit are active.

•with the protected area occupied (outputs of the barrier de-activated), the

relay outputs of the safety module are de-activated.

Figure 1 –Automatic operation without K1 K2 relays

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 (use as trip device

according to EN 61496). 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 24VDC.

8541409 - 19/09/2022 Rev.1 5

SAFETY RELAY MODULE SR ONE

MANUAL MODE

In this operating mode, the outputs of the safety relay are activated only if the protected

area is free and after sending the RESTART signal to the unit using the push-button or by

means of a specific command on the RESTART input (terminal 4).

➔Refer to the “THE RESTART COMMAND” at page 9 for a more detailed description of the

command.

➔Once the protected area has been occupied, the output relays are de-activated.

➔The sequence described on “THE RESTART COMMAND” section must be repeated in order to

re-activate the outputs relay.

Check correct functioning of the entire safety system (safety relay + barrier) following each

re-installation. In particular, if the original operating mode was Manual, check that the unit

has been reconfigured in this mode.

Figure 2 –Manual operation without K1 K2 relays

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 24VDC.

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SAFETY RELAY MODULE SR ONE

CONNECTION OF EXTERNAL CONTACTORS K1 AND K2

Control of external contactors K1 K2 can be activated in both operating modes. If this

control must be used, the series of normally closed contacts of the external contactors

must be connected to terminal 11 of the safety relay (figures 3 and 4).

Figure 3

Automatic operation with K1 K2 relays

Figure 4

Manual operation with K1 K2 relays

8541409 - 19/09/2022 Rev.1 7

SAFETY RELAY MODULE SR ONE

ELECTRICAL CONNECTIONS

Figure 5

SR ONE 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 the SR ONE safety relay in an environment with a protection rating of at least IP54.

The supply voltage must be 24 20% VDC; PELV (in compliance with the standard EN 60204-

1 (Chapter 6.4)).

During the installation of the SR ONE safety relay be sure to avoid short circuits between the

contacts 7 and 8.

Connect the safety relay module when it is not powered.

Do not use the SR ONE 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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SAFETY RELAY MODULE SR ONE

PINOUT

TERMINAL

NUMBER

SIGNAL

NAME

TYPE OF

SIGNAL

DESCRIPTION

24VDC

Power supply 24VDC

0VDC

Power supply 0VDC

Ground connection

RESTART

Input

Restart command

MAN

Input

Manual/Automatic Configuration

AUTO

Input

INPUT1

Input

Safety Input 1

INPUT2

Input

Safety Input 2

K1 K2 FBK

Input

Feedback external contactors K1 K2

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 2

CHECKLIST AFTER INSTALLATION

The SR ONE 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 the correct fixing of SR ONE to the Omega rail.

❒

2. Verify that all the cables are correctly inserted and the terminal blocks

well screwed.

❒

3. Verify that all the LEDs (indicators) light on correctly.

❒

4. Verify the correct positioning of the barrier connected to SR ONE.

❒

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

❒

8541409 - 19/09/2022 Rev.1 9

SAFETY RELAY MODULE SR ONE

INPUT AND OUTPUT

THE RESTART COMMAND

The RESTART command allows SR ONE to manage Manual operation.

➔The RESTART command must be sent to SR ONE

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 t1: 5s>t1>100ms).

➔The whole SYSTEM RESET TIME is obtained adding the

reset time of any external contactors K1 K2 to the reset

time of SR ONE.

•This data is particularly important in the case of automatic management of the

RESTART command sending, for example using a PLC.

•In the case of manual activation, a normally open external button can be used,

temporary closing of which generates the RESTART command.

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.

SYSTEM STATUS OUTPUT

The SYSTEM STATUS output reports exactly the output safety relays status:

•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)

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SAFETY RELAY MODULE SR ONE

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.

(See K1 K2 FEEDBACK input (EDM), page 10).

Relay K1

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

20mA and a voltage of 24VDC.

•To increase the electrical life of internal relays A and B, it is advisable to use

anti-disturbance devices which must be connected across the coils of K1 and K2.

K1 K2 FEEDBACK INPUT (EDM)

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 (K1 K2 FEEDBACK) to terminal 24VDC.

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