Reer AD SR2 Kurzanleitung

SAFETY INTERFACE

AD SR2

INSTALLATION

USE AND

MAINTENANCE HANDBOOK

INDICE

INTRODUCTION................................................................................................................... 3

OPERATING MODES........................................................................................................... 4

INSTALLATION AND ELECTRICAL CONNECTIONS...................................................... 7

DIMENSIONS......................................................................................................................10

TECHNICAL DATA .............................................................................................................10

WARRANTY ........................................................................................................................11

+This symbol indicates an important personal safety warning. Failure to comply

with the warning may result in very high risk for exposed personnel.

INTRODUCTION

The REER AD SR2 interface is a safety device that satisfies the

requirements of standard IEC 61496 – 1. When connected to one or two

photoelectric safety barriers equipped with PNP semiconductor outputs

and, where applicable, to a one or two-way safety switch, it performs

additional functions such as start/restart – interlocking and controlling

any external contactors.

The interface ensures that:

•output lines are open if the barriers are intercepted;

•if the RESTART contact remains closed in manual mode

this is not interpreted as AUTO mode.

The interface is also capable of controlling two external relays

(connected to its outputs) and uses the input of the K1/K2 feedback to

check that these operate in safety.

+The AD SR2 interface, when connected to one (or two) type 4 photoelectric

safety barriers certified to IEC 61496 – 1/2 standard, equipped with two built-in

solid-state PNP outputs, conforms to ESPE (Electro-Sensitive Protective

Equipment) type 4.

+If all the other characteristics specified above remain unchanged, but a type 2

barrier is used, the whole ESPE will also be type 2.

+When deciding on the safety category to be adopted, carefully consider the

risks analysis of the machine.

+The interface has been designed in particular for use with the REERlight

curtains of the Admiral (type 4) and Vision (type 2) series. 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 handbook may result

in very high risks for the operating personnel of the machine protected.

OPERATING MODES

AUTOMATIC

In this operating mode, the outputs of the safety interface follow the

status of the light curtain:

•with the protected area free (outputs of the light curtain

active), the relay outputs of the interface are active.

•with the protected area occupied (outputs of the light curtain

de-activated), the relay outputs of the interface are

de-activated.

Figure 1

+Use in manual mode (start/restart interlock activated) is mandatory in the case

in which 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

IEC 61496). Failure to comply with this rule may result in very serious risks for

the persons exposed.

+Check correct functioning of the entire safety system (interface + light curtain)

following each re-installation. In particular, if the original operating mode was

Manual, check that the unit has been reconfigured in this mode.

MANUAL

In this operating mode, the outputs of the safety interface are activated

only if the protected area is free and after sending the RESTART signal

to the interface using the push-button or by means of a specific

command on the RESTART input (terminal 6).

** CONNECT INPUTS 8-9-11 TO +24Vdc AND INPUT 12 TO 0Vdc IF NOT USED

Once the protected area has been occupied, the relay outputs are de-

activated. The sequence described above must be repeated in order to

re-activate these.

The RESTART command is active with a voltage of 24 Vdc.

The minimum duration of the command is 300 ms.

Figure 2

CONNECTION OF EXTERNAL CONTACTORS K1 and K2

Control of external contactors K1/K2 can be activated in both operating

modes. If this control is to be used, the set of normally closed and

normally open ed contacts of the external contactors must be connected

to terminal 13 of the interface (figures 3 and 4).

Figure 3

Automatic functioning with K1/K2 relays

** CONNECT INPUTS 8-9-11 TO +24Vdc AND INPUT 12 TO 0Vdc IF NOT USED

* USE SUITABLE ANTI-DISTURBANCE DEVICE

CONNECT INPUTS 8-9-11 TO +24Vdc AND INPUT 12 TO 0Vdc IF NOT USED

USE CONTACTS

Figure 4

Manual functioning with K1/K2 relays

OPERATING MODE SELECTION

TERMINAL 4 TERMINAL 5 FUNCTIONING

0 Vdc +24 Vdc Automatic

+24 Vdc 0 Vdc Manual

0 Vdc 0 Vdc

+24 Vdc +24 Vdc

Non-permissible

conditions

Table 1

STATUS INDICATORS

+If the fault cannot be clearly identified and eliminated, stop the machine and

contact the REER assistance service.

LED COLOUR STATE CONDITION

Green ON Correct functioning

and output relays closed

Red ON Malfunction detected, or

barrier engaged; output relays open

GUARD

BREAK

OFF Barriers clear, waiting for

RESTART command

ON Malfunction detected,

output relays open

FAIL Red OFF Correct functioning

ON K1/K2 malfunction detected

output relays open

FAIL

K1/K2 Red OFF Correct functioning

ON Barrier 1 clear

LIGHT

BARR1 Green OFF Barrier 1 intercepted, output relays open

ON Barrier 2 clear

LIGHT

BARR2 Green OFF Barrier 2 intercepted, output relays open

ON Safety switch closed

SAFETY

SWITCH Green OFF Safety switch open

output relays open

4 5 6 16 17 18

1 2 13 14 15

10 11 12 22 23 24

7 8 9 19 20 21

GUARD

BREAK

FAIL

K1/K2

ADMIRALADMIRAL AD SR2AD SR2

LIGHT

BARR1

LIGHT

BARR2

SAFETY

SWITCH

* USE SUITABLE ANTI-DISTURBANCE DEVICE

CONNECT INPUTS 8-9-11 TO +24Vdc AND INPUT 12 TO 0Vdc IF NOT USED

USE CONTACTS

INSTALLATION AND ELECTRICAL CONNECTIONS

+The AD SR2 safety interface must be installed in an environment with at least

IP54 protection.

+The voltage supplied to the AD SR2 interface must be of the FELV (Functional

Extra Low Voltage) 24VDC ±±20% type.

+During installation, take care not to short-circuit terminals 7, 8, 10 and 11 on

the AD SR2 interface.

+If connecting one barrier only, bring inputs that are not used (8 and 11)

to +24VDC.

The safety switch.

The system moves to BREAK status (output relays open) when the

safety switch (e.g. emergency pushbutton, safety limit switch),

connected as illustrated in the electrical diagrams on pages 4, 5, 6, is

opened. The switch must respond to the following specifications:

•2 N/C contact blocks connected mechanically.

•Release action to control contact opening.

•There must never be more than a 500msec delay between

both contacts in the switch closing; if that is not the case, the

interface moves to FAIL.

The interface can only restart (GUARD) after resetting the switch (with

the barrier clear).

+Should risk analysis regarding dangerous machinery authorize the use of a

safety switch with ONLY 1 N/C CONTACT (e.g. terminal 9 connected to +24VDC

or terminal 12 earthed), set both sections of the dip-switch (1) to ON (figure 5).

In that case, the test circuit for that specific safety switch will no longer

conform to EN 954-1 type 4.

+If using a safety switch with ONLY 1 N/C CONTACT, terminal 9 must be used

(to +24VDC). Terminal 12 must be left open.

+If the safety switch is not used, connect terminal 9 to +24VDC and terminal 12

to 0Vdc (dip-switch to OFF).

Figure 5

(1)

(PRESS LIGHTLY ON ALL

FOUR HOOKED COUPLINGS)

The RESTART command.

•The RESTART command must be sent to the safety interface by

connecting terminal 6 to the +24VDC.

•The contact used for the RESTART command must be

capable of switching 24VDC and 20mA (and guarantee a

closing time of > 300ms). This point is particularly important

when the RESTART command is managed automatically,

using a PLC for example.

•The system restarts within 300ms from sending a RESTART

command (in MANUAL mode). This means that the output circuit

cannot be energized before that time.

•To calculate the SYSTEM RESTART DELAY, add the restart

delay for any external K1/K2 contactors to the AD SR2

interface restart delay (300ms).

•In case of manual operation, an external N/O switch can be

used that, when temporarily closed, generates the RESTART

command.

+The Restart command must be located outside the danger zone, in a place

from which the danger zone and the entire work area concerned are

clearly visible.

+The controls must not be accessible from inside the danger zone.

The CLEAR output.

The interface supplies a voltage (idle) of +24VDC to the CLEAR output

(terminal 15) when the barriers are clear and the relays de-energized.

This output is internally protected to supply a maximum current of

100mA.

Characteristics of the output circuit.

The safety interface uses two safety relays with force guided contacts for

the output circuit.

To ensure correct insulation and avoid damage or premature ageing,

protect each output line with a delayed 4A fuse and check that the load

characteristics comply with the indications shown in the following table.

Minimum switching voltage 18 VDC

Minimum switching current 20 mA

Maximum switching voltage 250Vac

Maximum switching current 2A

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.

+If the K1 K2 Feedback is used, 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.

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 13) 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.

Warnings regarding the connection cables.

•For light curtain/safety interface connections of more than

50m, cables with a cross-section of at least 1mm2must be

used.

•It is good practice to separate the power supply of the safety

interface from that of other electrical appliances (electrical motors,

inverters, frequency variators) or other sources of disturbance.

•The path of the connection cables between the safety

interface ands the sensors, the connection referring to the test

command and feedback contacts connected to terminal 13

must be different from that of other power cables.

DIMENSIONS

TECHNICAL DATA

Supply voltage VDC 24 ±20%

Power requirement W8 max

Output Relay 2 N.A contacts, 1 N.C contact (2A; 250V)

Response time ms 20 max

Operating modes Manual or Automatic, selectable from terminal block

External relay control 1 N.A contact, 1 N.C contact (20mA; 24VDC)

Connections To terminal block with protection

against reversal of polarity

CLEAR output Imax = 100mA

Status indicators Led Guard/Break – Fail – Fail K1/K2 –

Light Barr1 - Light Barr2 – Safety Switch

Max. length of connections m100

Operating temperature °C 0 – 55

Enclosure protection rating IP 20

Terminal block protection rating IP 2X

Fastening fast attachment to rail according to EN 50022-35

Dimensions (h x w x d) mm 99 x 35 x 114,5

Weight g250

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