Pilz PNOZ X9 Data Sheet

E-STOP relays, safety gate monitors

Up to Category 4, EN 954-1

PNOZ X9

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

Approvals

PNOZ X9







Unit features

` Positive-guided relay outputs:

– 7 safety contacts (N/O), instanta-

neous

– 2 auxiliary contacts (N/C), in-

stantaneous

` 2 semiconductor outputs
` Connection options for:

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

` LED indicator for:

– Switch status channel 1/2
– Supply voltage
– Reset circuit
– Input circuits

` Semiconductor output signals:

– Supply voltage is present
– Switch status channel 1/2

` See order reference for unit types

Unit description

The safety relay meets the require­ments of EN 60204-1 and IEC 60204­1 and may be used in applications with

` E-STOP pushbuttons

` Safety gates
` Light barriers

Safety features

The relay conforms to the following
safety criteria:

` The circuit is redundant with built-in

self-monitoring.

` The safety function remains effecti-

ve 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

B1 B2 S52 13 23 33 43

=

=

A1 A2 Y1 Y2

Power

S11 S12 S21 S22

=

Feed-

back

~

InputInput

0 V 24 V

Y30 Y31 Y32 Y35

Input

Reset/

Start

S37S33 S34

Reset/

Start

K1

K2

K3

14 24 34 44

53 63 73 81 91

54 64 74 82 92

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

NSG-D-2-037-11/04

E-STOP relays, safety gate monitors

Up to Category 4, EN 954-1

PNOZ X9

Function description

` Single-channel operation: no red-

undancy 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,

– short circuits in the input circuit

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

Timing diagram

1 2

POWER

Reset/Start

Input

Output safe

Output aux.

Out semi RUN

Out semi CH

t1 t2

t1 t2

` Dual-channel operation with detec-

tion of shorts across contacts: red­undant input circuit, detects
– 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.

ab

t1

t1

t2

` Manual reset: Unit is active once

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

` Monitored reset: Unit i s ac t iv e o nc e

– the input circuit is closed and

then the reset circuit is closed
and opened again.

– the reset circuit is closed and

then opened again once the in­put circuit is closed.

` Increase in the number of available

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

ab

t2

t1

3

t2

t1

t2

Key

` Power: Supply voltage
` Reset/start: Reset circuit S33-S34
` Input: Input circuits S11-S12, S21-

S22, S52

` Output safe: Safety contacts 13-14,

23-24, 33-34, 43-44, 53-54, 63-64,
73-74

Wiring

Please note:

` Information given in the “Technical

details” must be followed.

` Outputs 13-14, 23-24, 33-34, 43-

44, 53-54, 63-64, 73-74 are safety
contacts, outputs 81-82, 91-92 are
auxiliary contacts (e.g. for display).

` To prevent contact welding, a fuse

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

` Calculation of the max. cabling runs

in the input circuit:

l

max

` Output aux: Auxiliary contacts 81-

82, 91-92

` Out semi RUN: Semiconductor out-

put supply voltage Y35

` Out semi CH: Semiconductor out-

put switch status Y32

` c: Automatic reset
` d: Manual reset

R

lmax

=

I

max

Rl / km

R

= max. overall cable resi-

lmax

stance (see technical details)

/km = cable resistance/km

R

l

` Use copper wire that can withstand

60/75 °C.

` Sufficient fuse protection must be

provided on all output contacts with
capacitive and inductive loads.

` e: Monitored reset
` a: Input circuit closes before reset

circuit

` 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-2-037-11/04Pilz 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 X9

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

S21
S22

S11
S12
S52

S1

S21
S22

E-STOP
with detection of shorts across con­tacts

S11
S52

Safety gate
without detection of shorts across
contacts

S21
S22

S11
S12
S52

S1

S21
S22

B1

B2

S11

S12
S52

S11

S12
S52

S11
S21

S22
S12

S1

L+

L-

S1

S1

S2

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
S52

S11
S12
S21
S22

S1

NSG-D-2-037-11/04

S2