Pilz PNOZ XV2.1 Data Sheet

E-STOP relays, safety gate monitors

Up to Category 4, EN 954-1

PNOZ XV2.1

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

Approvals

PNOZ XV2.1

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

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Unit features

` Positive-guided relay outputs:

– 2 safety contacts (N/O), instanta-

neous

– 2 safety contacts (N/O), delay-on

de-energisation

` Connection options for:

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

` LED indicator for:

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

` Delay-on de-energisation, fixed or

selectable

` Delay time can be cancelled via re-

set button

` 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

The max. category the safety contacts
can achieve in accordance with EN
954-1 is stated in the technical details.

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 unit has an electronic fuse.

Block diagram

A1 A2

~

Power

=

S11 S12

Reset/

Start

S13 S14

S21 S22

InputInput

Reset/

Start

S33 S34

S31 S32

Input

Reset

t

Y39 Y40

K3

K1

K4

K2

13 23

14 24

37 47

38 48

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

NSG-D-2-292-11/04

E-STOP relays, safety gate monitors

Up to Category 4, EN 954-1

PNOZ XV2.1

Function description

` Single-channel operation: no red-

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

` Dual-channel operation with detec-

tion of shorts across contacts: red­undant input circuit, detects

Timing diagram

POWER

Reset/Start

Reset t

v

Input

Output safe

Output safe del

– 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

t4

t1 t2

t1

t3 t2

t3

t1

` 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.

t2

t3 t4 t3

t2t1

Key

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

S33-S34

` Reset t

: Y39-Y40

v

` 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 are instanta-

neous safety contacts, outputs 37­38, 47-48 are delay-on de-energi­sation 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

R

lmax

=

I

max

Rl / km

= max. overall cable resi-

R

lmax

stance (see technical details)

/km = cable resistance/km

R

l

` Use copper wire that can withstand

60/75 °C.

` Output safe: Safety contacts, in-

stantaneous 13-14, 23-24

` Output safe del: Safety contacts,

delayed 37-38, 47-48

` c: Automatic reset
` d: Monitored reset

` Sufficient fuse protection must be

provided on all output contacts with
capacitive and inductive loads.

: Switch-on delay

` t

1

` t2: Delay-on de-energisation

: Delay time

` t

3

` t4: Waiting period

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

NSG-D-2-292-11/04Pilz 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 XV2.1

Preparing for operation

` Supply voltage

Supply voltage AC DC

A1

A2

L1

N

PE

` Input circuit

Input circuit Single-channel Dual-channel
E-STOP

without detection of shorts across
contacts

S21
S22

S12
S11
S32

S31

S1

E-STOP
with detection of shorts across con­tacts

S11
S12

Safety gate
without detection of shorts across
contacts

S21
S22

S12
S11
S32

S31

S1

A1

A2

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

NSG-D-2-292-11/04

S2