Pilz PNOZ 16 Data Sheet

E-STOP relay, safety gate monitor

Up to Category 4, EN 954-1

PNOZ 16

Safety relay for monitoring emergency
stop pushbuttons, safety gates, safety
mats and safe edges

Approvals

PNOZ 16







Unit features

` Positive-guided relay outputs:

– 2 safety contacts (N/O), instanta-

neous

` Connection options for:

– E-STOP pushbutton
– Safety gate limit switch
– Reset button
– Safe edges
– Safety mats

` LED indicator for:

– Switch status channel 1/2
– Supply voltage
– Detection of shorts across con-

tacts on safety mat "EXT.
FAULT"

` See order reference for unit types

Unit description

The safety relay meets the require­ments of EN 60204-1, IEC 60204-1
and EN 1760-1 and may be used in
applications with

` E-STOP pushbuttons
` Safety gates
` Safety mats
` Safe edges

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 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 13 23

=

Power

S11 S12 S21 S22

InputInput

Feed-

back

S31 S32

Input

S33 S34

Reset/

Start

K1

K2

~

A1 A2

Y1 Y2

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-2-060-02/05

E-STOP relay, safety gate monitor

Up to Category 4, EN 954-1

PNOZ 16

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 with detec-

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

circuit,

Timing diagram

POWER

Reset/Start

Input

Output safe

FAULT

t1 t2

t1 t2

– short circuits and shorts bet-

ween contacts in the input cir­cuit.

` When the safety mat is actuated, a

short is formed between the inputs
and internal fault detection is ener­gised. The safety contacts open
and the LED EXT.FAULT is lit. If the
safety mat is cleared and supply
voltage is maintained, the unit is

1

t

1

t2 t3

ready for operation again once the
recovery time has elapsed.

` 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

2

t1

t2

t2

t1

t2

Key

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

S22, S31-S32

` Output safe: Safety contacts 13-14,

23-24

Wiring

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

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.

` FAULT: Short between contacts in

the input circuit due to actuation of
safety mat

` 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

: Delay-on de-energisation

` t

2

` t3: Recovery time after short across

contacts

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

NSG-D-2-060-02/05Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany

-2

E-STOP relay, safety gate monitor

Up to Category 4, EN 954-1

PNOZ 16

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

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

B1

B2

S22
S32
S31
S21

L+

L-

S1

Safety gate
with detection of shorts across con­tacts

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

S11
S12

S22
S21
S32

S31

S1

S22
S21
S32

S31

NSG-D-2-060-02/05

S2