Pilz PNOZ x1 Data Sheet

E-STOP relays

up to Category 2, EN 954-1

PNOZ X1

Safety relay for monitoring E-STOP
pushbuttons.

Approvals

PNOZ X1







Unit features

` Positive-guided relay outputs:

– 3 safety contacts (N/O), instanta-

neous

– 1 auxiliary contact (N/C), instan-

taneous

` Safe separation of safety contacts

13-14, 23-24, 33-34 from input cir­cuits A1-A2, feedback loop Y1-Y2
and auxiliary contact 41-42.

` Connection options for:

– E-STOP pushbutton
– Reset button

` LED indicator for:

– Switch status channel 1/2
– Supply voltage

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

The safety relay is not suitable for non­contact barriers because

` a dynamic start is not possible
` the unit can be started during the

delay-on de-energisation time.

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

* Safe separation in accordance with EN 60947-1, 6 kV (see unit features)

A1 A2

A1 A2

~

~

Power

Power

=

=

Input

Input

Y1 Y2

Y1 Y2

Reset/

Reset/

Start

Start

K1

K1

K2

K2

*

*

13 23 33 41

13 23 33 41

14 24 34 42

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-2-069-2006-09

E-STOP relays

up to Category 2, EN 954-1

PNOZ X1

Function description

` Single-channel operation: no re-

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

Timing diagram

POWER

Reset/Start

Input

Output safe

Output aux.

Key

` Power: Supply voltage
` Reset/start: Reset circuit Y1-Y2
` Input: Input circuits A1-L+
` Output safe: Safety contacts 13-14,

23-24, 33-34

` 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.

1 2

t1 t2

t1 t2

` Output aux: Auxiliary contacts 41-

42

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

circuit

` Increase in the number of available

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

ab

t1

t1

t2

t2

` b: Reset circuit closes before input

circuit

: Switch-on delay

` t

1

: Delay-on de-energisation

` t

2

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

R

= max. overall cable resist-

lmax

ance (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.

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

NSG-D-2-069-2006-09Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany

-2

E-STOP relays

up to Category 2, EN 954-1

PNOZ X1

Preparing for operation

` Supply voltage

Supply voltage AC DC

A1

S1

L1

A1

S1

L+

A2

N

A2

` Input circuit

Input circuit Single-channel Dual-channel
E-STOP

without detection of shorts across con-

A1

S1

L+

tacts

` Reset circuit

Reset circuit E-STOP wiring (single-channel) E-STOP wiring (dual-channel)
Automatic reset

Manual reset

Y1

Y2

S3

Y1

L-

Y2

` Feedback loop

Feedback loop Automatic reset Manual reset
Contacts from external contactors

13 (23, 33)
14 (24, 34)

Y1
Y2

K5

K6

K5

K6

L1
N

` Key

S1 E-STOP pushbutton
S3 Reset button

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

Y1

Y2
13 (23, 33)
14 (24 ,34)

NSG-D-2-069-2006-09

K5

K6

K5

K6

S3

L1
N