Pilz PNOZ x3 Data Sheet

E-STOP relays, safety gate monitors

Up to Category 4, EN 954-1

PNOZ X3

Safety relay for monitoring E-STOP
pushbuttons and safety gates.

Approvals

PNOZ X3







Unit features

` Positive-guided relay outputs:

– 3 safety contacts (N/O), instanta-

neous

– 1 auxiliary contact (N/C), instan-

taneous

` 1 semiconductor output
` Connection options for:

– E-STOP pushbutton
– Safety gate limit switch
– Reset button

` LED indicator for:

– Switch status channel 1/2
– Supply voltage

` Semiconductor output signals:

– Switch status channel 1/2

` See order reference for unit types

Unit description

The safety relay meets the require­ments of EN 60947-5-1, EN 60204-1
and VDE 0113-1 and may be used in
applications with

` E-STOP pushbuttons
` Safety gates

Safety features

The relay meets the following safety
requirements:

` The circuit is redundant with built-in

self-monitoring.

` The safety function remains effec-

tive in the case of a component fail­ure.

` The correct opening and closing of

the safety function relays is tested
automatically in each on-off cycle.

` The tranformer is short circuit-

proof. An electronic fuse is used on
a DC supply.

Block diagram

S11 S12A1 A2

~

~

Power

=

=

B1 B2 Y31

24 V

S21 S22

Y32

Input

S13 S14

Reset/

Start

S33 S34

Reset/

Start

K1

K2

23 33 41

13

14 24 34 42

S31 S32

InputInput

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

NSG-D-2-036-2006-07

E-STOP relays, safety gate monitors

Up to Category 4, EN 954-1

PNOZ X3

Function description

` Single-channel operation: no re-

dundancy in the input circuit, earth
faults in the reset and input circuit
are detected.

` Dual-channel operation with detec-

tion of shorts across contacts: re­dundant input circuit, detects

Timing diagram

POWER

Reset/Start

Input

Output safe

Output aux.

Out semi CH

– earth faults in the reset and input

circuit,

– short circuits in the input circuit

and, with a monitored reset, in
the reset circuit too,

– shorts between contacts in the

input circuit.

` Automatic start: Unit is active once

the input circuit has been closed.

1 2

t1 t2 t1 t2

t3

` Monitored reset: Unit is active once

the input circuit is closed and once
the reset circuit is closed after the
waiting period has elapsed
(see technical details).

` Increase in the number of available

contacts by connecting contact ex­pander modules or external contac­tors/relays.

t1

t2

t3

t1 t2

Key

` Power: Supply voltage
` Reset/start: Reset circuit S13-S14,

S33-S34

` Input: Input circuits S11-S12, S21-

S22, S31-S32

Wiring

Please note:

` Information given in the “Technical

details” must be followed.

` Outputs 13-14, 23-24, 33-34 are

safety contacts, output 41-42 is an
auxiliary contact (e.g. for display).

` To prevent contact welding, a fuse

should be connected before the
output contacts (see technical de­tails).

` Calculation of the max. cable runs

in the input circuit:

l

max

R

lmax

=

I

max

Rl / km

= max. overall cable resist-

R

lmax

ance (see technical details)

/km = cable resistance/km

R

l

` Use copper wire that can withstand

60/75 °C.

` Output safe: Safety contacts 13-14,

23-24, 33-34

` Output aux: Auxiliary contacts 41-

42

` Out semi CH: Semiconductor out-

put switch status channel 1/2

` Sufficient fuse protection must be

provided on all output contacts with
capacitive and inductive loads.

` c: Automatic reset
` d: Monitored reset

: Switch-on delay

` t

1

` t2: Delay-on de-energisation

: Waiting period

` t

3

Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

NSG-D-2-036-2006-07Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany

-2

E-STOP relays, safety gate monitors

Up to Category 4, EN 954-1

PNOZ X3

Preparing for operation

` Supply voltage

Supply voltage AC DC

A1

A2

B2 PE

L1

N

` Input circuit

Input circuit Single-channel Dual-channel

E-STOP
without detection of shorts across con­tacts

E-STOP
with detection of shorts across contacts

Safety gate
without detection of shorts across con­tacts

S21

S22

S21

S22

S12

S11

S32
S31

S12

S11

S32
S31

S1

S11

S12

S1

B1

B2

S22

S32

S31
S21

L+

L-

S1

Safety gate
with detection of shorts across contacts

Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: [phone], Telefax: [phone], E-Mail: [e-mail]

S11

S12

S22

S21

S32
S31

S1

S2

NSG-D-2-036-2006-07