Pilz PNOZ X7P Data Sheet

E-STOP relays, safety gate monitors

Up to Category 2, EN 954-1

PNOZ X7P

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

Approvals

PNOZ X7P





Unit features

` Positive-guided relay outputs:

– 2 safety contacts (N/O), instanta-

neous

` Connection options for:

– E-STOP pushbutton
– Reset button

` LED indicator for:

– Switch status channel 1/2
– Supply voltage

` Plug-in connection terminals (either

cage clamp terminal or screw termi­nal)

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

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 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.

Block diagram



The relay conforms to the following
safety criteria:

A1 A2 Y1 Y2

~

Input

Reset/

Start

=

Power

13 23

K1

K2

14 24

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

NSG-D-2-340-11/04

E-STOP relays, safety gate monitors

Up to Category 2, EN 954-1

PNOZ X7P

Function description

` Single-channel operation: no red-

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

Timing diagram

Reset/Start

Power/Input

Output safe

Key

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

23-24

Wiring

` 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 t2t1t1 t2

` 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

` b: Reset circuit closes before input

circuit

: Switch-on delay

` t

1

` t2: Delay-on de-energisation

Please note:

` Information given in the “Technical

details” must be followed.

` Outputs 13-14, 23-24 are safety

contacts.

` 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

` Use copper wire that can withstand

` Sufficient fuse protection must be

R

lmax

=

I

max

Rl / km

= max. overall cable resi-

R

lmax

stance (see technical details)

/km = cable resistance/km

R

l

60/75 °C.

provided on all output contacts with
capacitive and inductive loads.

Cable capacitance CL depends on the supply voltage U

B

PNOZ X7 AC: The cable runs depend
on the cable capacitance.

` Loop circuit, 1 phase: max. l
` Stub circuit: Cable capacitance C

and therefore the cable runs ls are
dependent on the supply voltage
U

B

UB [V] 24 110 120 230 240
C

[nF] 37.5 37.5 37.5 7.5 7.5

L

Cable runs Loop circuit Stub circuit

l

r

U

B

N

PNOZ X7 AC

A1
A2

l

U

B

N

s

PNOZ X7 AC

A1
A2

= 1 km

r

L

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

NSG-D-2-340-11/04Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany

-2

E-STOP relays, safety gate monitors

Up to Category 2, EN 954-1

PNOZ X7P

Preparing for operation

` Supply voltage

Supply voltage AC DC

A1

A2

L1

N

` Input circuit

Input circuit Single-channel Dual-channel
E-STOP

without detection of shorts across

A1

S1

L+/L1

contacts

Safety gate
without detection of shorts across
contacts

S1

L+/L1A1

` Reset circuit

A1

A2

L+

L-

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

Manual reset

Y1

Y2

S3

Y1

Y2

` Feedback loop

Feedback loop Automatic reset Monitored reset
Contacts from external contactors

Y1
Y2

13 (23)
14 (24)

K5

K6

K5

K6

L1
N

Y1
Y2

13
14

K5

K6

K5

K6

S3

L1
N

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

NSG-D-2-340-11/04