
5. Functional safety engineering
Festo P.BE-CMMP-AS-3A-HW-EN 0708NH
55
Inputs
Outputs
PLC
+24V
+24V
+24V
+24V
0V
0V
Driver supply of
output stage
0V
[X3] SAFE STANDSTILL / SUPPLY 24V
[X1] I/O communication
Mains input
24V Input ARS 2100
24V-Input
µP
1
2
3
4
5
6
Triggering of relay
n.c.
NC1
NC2
C
o
n
tr
o
lle
r
e
n
a
b
lin
g
O
u
tp
u
t
s
ta
g
e
d
ri
v
e
r
s
u
p
p
ly
Power
contactor
L
N
DIN5: Controller enabling
DIN4: Output stage enabling
CMMP-AS-3A...
EMERGENCY
STOP
switching
device
EN954-1 KAT3
with delay
K1
EMERGENCY
STOP request
EMERGENCY STOP
requested
21
9
1
2
8
9
Drawn contact
position:
EMERGENCY
STOP requested
or supply voltage
switched off
F
e
e
d
b
a
c
k
d
ri
v
e
r
s
u
p
p
ly
O
u
tp
u
t
s
ta
g
e
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n
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b
lin
g
[X9.] Power supply
Fig. 5.3 Emergency stop circuit as per EN 954-1 Category 3 and Stop Category 0 as per
EN 60204-1
Mode of operation:
The EMERGENCY-STOP request causes the EMERGENCY-STOP switching device to block
the end stage enable and the relay control for the IGBT end stage driver supply. The drive
runs to a standstill and, if present, the motor holding brake is engaged.
The drive is in the "Safe standstill" state.
The EMERGENCY-STOP switching device is approved for safety category 3 as per EN954-1.
A higher-level control system monitors the "EMERGENCY-STOP request" and "Driver sup-
ply feedback" signals and checks them for plausibility. If an error occurs the mains circuit
breaker is switched off.
Содержание CMMP-AS-C2-3A
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