Pilz PNOZ 1 Data Sheet
E-STOP relays, safety gate monitors
=
=
Power
InputInput
T11 T12 T12 T22 A1 A2 13 23 33
14 24 344142
K1
K2
Reset/
Start
T33 T34
Feed-
back
X1 X2
=
=
Power
InputInput
T11 T12 T12 T22 A1 A2 13 23 33
14 24 344142
K1
K2
Reset/
Start
T33 T34
Feed-
back
X1 X2
Up to Category 3, EN 954-1
PNOZ 1
Gertebild
][Bildunterschrift
Safety relay for monitoring E-STOP
pushbuttons and safety gates.
Approvals
PNOZ 1
Unit features
Gertemerkmale
Positive-guided relay outputs:
– 3 safety contacts (N/O), instanta-
neous
– 1 auxiliary contact (N/C), instan-
taneous
Connection options for:
– E-STOP pushbutton
– Safety gate limit switch
– Reset button
LED indicator for:
– Switch status channel 1/2
– Supply voltage
See order reference for unit types
Unit description
Bestimmung/G erätebeschr eibung NOT- AUS, Schutz _PNOZ
The safety relay meets the requirements of EN 60947-5-1, EN 60204-1
and VDE 0113-1 and may be used in
applications with
E-STOP pushbuttons
Safety gates
Safety features
][Sicherheitseigenscha ften Schaltgerät_allgem einer Teil
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.
Sicherheitseigenschaften Zusatz - AC/DC-Gerte_PNOZ
The tranformer is short circuit-
proof. An electronic fuse is used on
a DC supply.
Zulassungen
Block diagram
Blockschaltbild
1002105-EN-03-2012-01
E-STOP relays, safety gate monitors
POWER
Input
Output safe
Output aux.
Reset/Start
t1 t2
t1
t2
t2
t1
t1 t2
1 2
ab
R
lmax
Rl / km
I
max
=
Up to Category 3, EN 954-1
PNOZ 1
Function description
][Funktionen_einkanalig
Single-channel operation: no re-
dundancy in the input circuit, earth
faults in the reset and input circuit
are detected.
][Funktionen_zweikanalig_ohne_quer
Dual-channel operation without de-
tection of shorts across contacts:
redundant input circuit, detects
Timing diagram
Key
Power: Supply voltage
Reset/start: Reset circuit
Input: Input circuits T12-T22, T11-
T22
Output safe: Safety contacts 13-14,
23-24, 33-34
– earth faults in the reset and input
circuit,
– short circuits in the input circuit
and, with a monitored reset, in
the reset circuit too.
][Funktionen_autoStart
Automatic start: Unit is active once
the input circuit has been closed.
][Funktionen_manuStart
][Zeitdiagramm_auto_manu_aux
Output aux: Auxiliary contacts 41-
42
: Automatic reset
: Manual reset
a: Input circuit closes before reset
circuit
Manual reset: Unit is active once
the input circuit is closed and then
the reset circuit is closed.
][Funktionen_Kontaktvervielfachung
Increase in the number of available
instantaneous safety contacts by
connecting contact expansion
modules or external contactors.
b: Reset circuit closes before input
circuit
: Switch-on delay
t
1
: Delay-on de-energisation
t
2
Wiring
Verdrahtung][Verdrahtung_Si_Hi_unverz
Please note:
Information given in the “Technical
details” must be followed.
Outputs 13-14, 23-24, 33-34 are
safety contacts, outputs 41-42 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
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.
1002105-EN-03-2012-01
-2
E-STOP relays, safety gate monitors
A1
L1/L+
N/L-
A2
S1
T11
T22
T12
S1
T11
T12
T22
S1
T11
T22
T12
S1
S2
T11
T12
T22
Up to Category 3, EN 954-1
PNOZ 1
Preparing for operation
Betriebsbereitschaft her stellen
Supply voltage
Supply voltage AC/DC
Input circuit
Input circuit Single-channel Dual-channel
E-STOP
without detection of shorts across contacts
E-STOP
with detection of shorts across contacts
Safety gate
without detection of shorts across contacts
Safety gate
with detection of shorts across contacts
1002105-EN-03-2012-01
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