Application examples for conventional PSRclassic safety relays
102597_en_03
PHOENIX CONTACT
Function description
For additional diagnostic descriptions, please refer to Section 8.
Notes on theapplication
example
1.
The emergency stop control device is positive opening in accordance with EN 60947-5-1.
2.
When using enable switches, observe the notes in standards EN 60204-1,
EN ISO 10218, EN 1088, and EN ISO 13849-1.
3.
Contactors K3, K4, K5, and K6 have mirror contacts in accordance with EN 60947-4-1.
4.
Stop category 0 describes an immediate stop by removal of power by interrupting a
machine or drive element in accordance with EN 60204-1.
5.
When using the safety relay, take into consideration the maximum permissible number
of cycles for observing the SIL/PL safety characteristics in the specific application. The
safety characteristics can be found in the AH EN SAFETY CHARACTERISTICS appli-
cation note or the SISTEMA library.
Start
Action
Result
Diagnostics,
KS1
Diagnostics,
KS2
1.
Unlock emergency
stop button S1.
The emergency stop circuit supplies the safety relay
(KS1).
The circuit is enabled via the reset button (S3).
2.
Press reset button
S3.
Contactors K3 and K4 are activated and the mirror
contacts (N/C contacts of K3 and K4) in the reset
circuit are opened.
Enable
function
1.
Enable switch B1,
stage 1 (not acti-
vated)
The circuit is enabled via the enable switch (B1).
2.
Enable switch B1,
stage 2 (enable)
The enable switch (B1) closes sensor circuit S11,
S12 and S21, S22 at the second safety relay (KS2).
The automatic reset function closes enabling cur-
rent paths 13, 14 and 23, 24 at the second safety
relay (KS2).
Holding down the enable switch (B1) keeps the
safety function at the first safety relay (KS1) active.
Stop
Action
Result
Diagnostics,
KS1
Diagnostics,
KS2
1.
Enable switch,
stage 3 (pushed
through)
The safety function is triggered and contactors
K3 … K6 drop out immediately.
In the reset circuit of both safety relays KS1 and
KS2, the mirror contacts (N/C contacts of K3 … K6)
are closed.
Power
IN1/2
K1
K2
Power
IN1/2
K1
K2
Power
IN1/2
K1
K2
Power
IN1/2
K1
K2
Power
IN1/2
K1
K2
Power
IN1/2
K1
K2
Power
IN1/2
K1
K2
Power
IN1/2
K1
K2
Power
IN1/2
K1
K2
Power
IN1/2
K1
K2
Содержание 2702924
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