Specifications

18 PHOENIX CONTACT
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Safety relays for contact extension
and universal use
The PSR-URM4 relays, which, like all PSR
safety relays, incorporate positively driven
contacts in accordance with EN 50205, are
suitable for the duplication of contacts. Up to
five N/O contacts and two N/C contacts have
been integrated into the housing with a width
of just 22.5 mm. These contacts are
mechanically interconnected and are
therefore always arranged in the same
position due to the fully positively-driven
operation. Welding of an N/O contact, for
instance, can thus be signaled in the case of an
error. The corresponding base module
evaluates the state and reliably prevents a
restart of the safety function when it is
demanded.
PSR-URM4_B
Order No. 2981033 (screw connection)
Order No. 2981046 (spring-cage connection)
• Safety relay for extending the number of
contacts
• Max. safety category 4 in accordance with
EN 954-1
• Single or two-channel control
• Five enabling contacts and one alarm and
readback contact each
• With or without safe isolation
Kirchenwald tunnel, Switzerland
Connecting gates between the two tubes of the Kirchenwald
tunnel serve as a way of escape from the other tube in the
case of an emergency. Special safety strips were used in
order to avoid the danger of being crushed when the gates
are activated. These safety strips comprise PSR safety relays
to extend the number of contacts of the evaluating devices
used.
PSR-URM
Order No
Order No
• Positively driven coupli
• With a choi
N/C
three N/C
• Avail
120 V AC/DC
Exampl
relay
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