Pilz PNOZ X7.1 Data Sheet
E-STOP relays, safety gate monitors
Up to Category 2, EN 954-1
PNOZ X7.1
Kein Gerätebild vorhanden
Safety relay for monitoring E-STOP
pushbuttons.
Approvals
PNOZ X7.1
Unit features
` Positive-guided relay outputs:
– 1 safety contact (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
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
A1 A2 Y1 Y2
A1 A2 Y1 Y2
~
~
Power
Power
=
=
Input
Input
Reset/
Reset/
Start
Start
K1
K1
K2
K2
13 21
13 21
14 22
14 22
Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
NSG-D-2-339-2010-01
E-STOP relays, safety gate monitors
Up to Category 2, EN 954-1
PNOZ X7.1
Function description
` Single-channel operation: no re-
dundancy in the input circuit, earth
faults in the reset and input circuit
are detected.
Timing diagram
Reset/Start
Power/Input
Output safe
Output aux.
Key
` Power: Supply voltage
` Reset/start: Reset circuit Y1-Y2
` Input: Input circuits A1
` Output safe: Safety contacts 13-14
` Output aux: Auxiliary contacts 21-
22
` 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
t2
` c: Automatic reset
` d: Manual reset
` a: Input circuit closes before reset
circuit
` b: Reset circuit closes before input
circuit
` Increase in the number of available
contacts by connecting contact expander modules or external contactors/relays.
ab
t1
t2
: Switch-on delay
` t
1
: Delay-on de-energisation
` t
2
t2t1t1
Wiring
Please note:
` Information given in the “Technical
details” must be followed.
` Outputs 13-14 are safety contacts,
output 21-22 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
= max. overall cable resist-
R
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: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
NSG-D-2-339-2010-01Pilz GmbH & Co. KG, Sichere Automation, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
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