Pilz PNOZ X2.8P Data Sheet

E-STOP relays, safety gate monitors

Up to Category 4, EN 954-1

PNOZ X2.8P

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

Approvals

PNOZ X2.8P





Unit features

` Positive-guided relay outputs:

– 3 safety contacts (N/O), instanta-

neous

– 1 auxiliary contact (N/C), instan-

taneous

` Connection options for:

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

` LED indicator for:

– Switch status channel 1/2
– Supply voltage

` Plug-in connection terminals (either

cage clamp terminal or screw termi­nal)

` 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

` Light barriers

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.

Block diagram

~

=

( )

Power

*only with UB 24 - 240 VAC/DC

S11 S12A1 A2

*

S21 S22

InputInput

S52

Input

S12 S34

Reset/

Start

K1

K2

23 33 41

13

14 24 34 42

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

NSG-D-2-332-2006-07

E-STOP relays, safety gate monitors

Up to Category 4, EN 954-1

PNOZ X2.8P

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 without de-

tection of shorts across contacts:
redundant input circuit, detects
– earth faults in the reset and input

circuit,

Timing diagram

POWER

Reset/Start

Input

Output safe

Output aux.

– short circuits in the input circuit

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

` Dual-channel operation with detec-

tion of shorts across contacts: re­dundant input circuit, detects
– earth faults in the reset and input

circuit,

– short circuits and shorts be-

tween contacts in the input cir­cuit.

1 2

t1 t2

t1 t2

` Automatic start: Unit is active once

the input circuit has been closed.

` Manual reset: Unit is active once

the input circuit is closed and then
the reset circuit is closed.

` Increase in the number of available

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

ab

t1

t1

t2

t2

Key

` Power: Supply voltage
` Reset/start: Reset circuit S12-S34
` Input: Input circuits S11-S12, S21-

S22, S52

` Output safe: Safety contacts 13-14,

23-24, 33-34,

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 aux: Auxiliary contacts 41-

42

` c: Automatic reset
` d: Manual reset
` a: Input circuit closes before reset

circuit

` Sufficient fuse protection must be

provided on all output contacts with
capacitive and inductive loads.

` b: Reset circuit closes before input

circuit

: Switch-on delay

` t

1

` t2: Delay-on de-energisation

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

NSG-D-2-332-2006-07Pilz 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 X2.8P

Preparing for operation

` Supply voltage

Supply voltage 24 – 240 V AC/DC 24 V AC/DC

A1

A1

S21

S21

A2

A2

L1

L1

N

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

S11

S12

S52

S11

S12

S52

S1

S21

S22

S11

S52

S1

S21

S22

S11

S12
S52

A1

A2

S11

S21

S22
S12

S11

S12
S52

S1

L+

L-

S1

S1

S2

Safety gate
with detection of shorts across contacts

Light barrier
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]

S22

S22

S21

S21

S11

S52

S12

S12
S52

S52

S11
S12

S21

S22

S1

NSG-D-2-332-2006-07

S2

24 V DC

24 V DC

Gnd

Gnd