NORSTAT Safety Relays - Handbuch (Seite 96)

application guide safety relays from riese electronic page
92
Monitoring of a clocked safety switch with automatic start and
supply of the clocked safety switch by an external power supply.
The clocked safety switch is supplied by an external power supply. The
negative pole of the clocked safety switch is connected additionally to terminal
S36.
Function same as in application 9
Category 4, PLe, SIL 3 reachable
S32 S33 S22
S12
S11 S21 S34
A1
Kext
S35
S36
A2
+24V DC 0V DC
L+ L-
0V DC +24V DCx
TE A
Monitoring of a clocked safety switch with monitored start and
supply of the clocked safety switch by an external power supply.
The clocked safety switch is supplied by an external power supply. The
negative pole of the clocked safety switch is connected additionally to terminal
S36.
Function same as in application 10
Category 4, PLe, SIL 3 reachable S22
S12
S11 S21
A1 S35
S36
A2
+24V DC 0V DC
S32 S33 S34
Kext
Start
L+ L-
+24V DCx 0V DC
TE A
Contact expansion with SAFE X4.1 in applications with monitored
start
For monitoring the contacts of the expansion are linked into the feedback
control loop S33/S34 of the SAFE FLEX.
In the case of protected laying of the wires and exclusion of parasitic
voltage between U1 and K1/K21 the expansion is qualified up to safety
category 4
Category 4, PLe, SIL 3 reachable
A1 A2
+24V DC 0V DC
S32 S33 S34
Start
U22 K1 K21
U1 Y1 Y2 13
14
23
24
A1
A2
+24V DC
0V DC
13
14
23
24
33
34
43
44
+ Eingangsbeschaltung
+ inputs wiring
SAFE FLEX SAFE X4.1
Contact expansion with SAFE X4 in applications with automatic
start
For monitoring the N/C contacts of the expansion are linked into the feedback
control loop of the SAFE FLEX.
Category 4, PLe, SIL 3 reachable
A1 A2
+24V DC 0V DC
S32 S33 S34 U22
K1 K21
U1 Y1 Y2 13
14
23
24 A1 A2
+24V DC
0V DC
13
14
23
24
33
34
43
44
+ Eingangsbeschaltung
+ inputs wiring
SAFE FLEX SAFE X4
NORSTAT INC. 300 Roundhill Dr. Rockaway, NJ 07866 Tel: 973-586-2500 Fax: 973-586-1590 www.norstat.com