Safe monitoring relays
Pilz GmbH & Co. KG, Felix-Wankel-Straße 2, 73760 Ostfildern, Germany
Telephone: +49 711 3409-0, Telefax: +49 711 3409-133, E-Mail: pilz.gmbh@pilz.de
Up to PL e of EN ISO 13849-1
PSWZ X1P
NSG-D-2-336-2009-11
Gertebild
][Bildunterschrift_Stillstandswchter
Standstill monitor for safe standstill
monitoring
Approvals
Zulassungen
Unit features
Gertemerkmale
` Positive-guided relay outputs:
– 2 safety contacts (N/O), instanta-
neous
– 1 auxiliary contact (N/C), instan-
taneous
` LED indicator for:
– Supply voltage
– Standstill on channel 1/2
–Switch status
– Fault signal if simultaneity time is
exceeded
` Semiconductor outputs signal:
– Error
–Switch status
` Semiconductor input for reset func-
tion
` Measuring inputs for single or
three-phase motors
` Measuring voltage selectable
` Feedback loop
` Plug-in connection terminals (either
spring-loaded terminal or screw
terminal)
` See order reference for unit types
Unit description
Gertebeschreibung
The unit is used for safe standstill
monitoring. It is designed for use on
` Standstill monitoring functions on
plants with dangerous machine
parts or tools (EN 1088 clause 7.4),
` Safety circuits in accordance with
EN 60204-1 and IEC 60204-1.
Standstill is only detected on power-
free measuring circuits. Residual volt-
ages, induced voltages or drives with-
in the position control will prevent safe
standstill detection!
Safety features
][Sicherheitseigenschaften Stillstand
` Relays K1 and K2 are interlocked in
such a way that the unit cannot be
switched back on in the case of
contact welding or an open circuit.
` The unit monitors the measuring
circuits for open circuit. If an open
circuit occurs between the unit and
the motor or on the motor itself, the
unit immediately switches off.
` The standstill monitor prevents the
plant from being enabled in the fol-
lowing cases
– Power supply failure
– Component failure
– Measuring circuits are open cir-
cuit
– Coil defect/open circuit
Block diagram
Blockschaltbild
PSWZ X1P
SÜDDEUTSCHLAND
A1 A2
=
Power
~
K1
K2
Input
L1
13
23 41
14 24 42
L2 L3
Reset
RESET
Feed-
back
0 V 24 V
Y30 Y31 Y32 Y35Y1 Y2
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