Installation
3.3
Circuit for
“
Safe standstill with safety-oriented PLC
”
The example shows minimum wiring of the components. This ensures the troublefree operation of
the
“
Safe standstill
”
function of 93XX controllers.
S 1
S 2
+ 2 4 V
K 4
O F F
O N
K 4
Y 1
S
af
et
y-
or
ie
nt
ed
P
LC
0 V
F 1 . . F 3
L 2
L 1
L 3
In
pu
ts
O
ut
pu
ts
O
ut
pu
ts
In
pu
ts
O
ut
pu
ts
M o t o r b r a k e
S t a r t - S t o p
m o m e n t a r y c o n t a c t
p u s h b u t t o n
S 3
E m e r g e n c y
o f f
E m e r g e n c y o f f
S 4
S a f e t y d o o r
m o n i t o r i n g
M a i n s c o n t a c t o r
C
lo
ck
pu
ls
e
ou
tp
ut
s
Q S P
R F R
9 3 x x
X 1 1
G N D
I G B T
A 3
V 0 0 4
D C
+ 2 4 V
C W
r o t a t i o n
C C W
r o t a t i o n
K
S R
K 3 2
3 4
3 3
E 1
K 3 1
E 2
2 8
3 9
5 9
X 5
A 1
n = 0
A 4
Fig. 5
Minimum wiring for 93XX-V004 controllers with safety-oriented PLC
to EN 954-1 control category 3 and EN 1037, stop category 1 to EN 60204-1
3.3.1
Description
For a circuit with safety-oriented PLC control follow EN 954-1 control category 3 and EN 1037. The
circuit in Fig. 5 shows a stop category 1 stop function according to EN 60204-1 (with safety door
monitoring).
•
The circuit is positively dynamic for the emergency off function (S3), door locking (S4) and
feedback contact of the safety relay (K
SR
), i. e. proper and correct functioning of the external
circuit of the PLC and PLC inputs can be ensured through a clock signal.
The circuits for emergency off and door lock are two channel circuits protected against short
circuits between signal cables.
•
The integrated switching devices are equipped with positively driven contacts.
•
The PLC outputs for motor brake (Y1) and mains contactors (K4) are two-channel circuits.
The safe activation of the functions is ensured by the second switch-off circuit in the output
module of the PLC. Additionally, the PLC reads the NC contact of K4.
Note for the PLC programmer!
In the event of faulty operation of the safety relay for the external pulse inhibit, the power supply for
the controller must be switched off via the mains contactor (K4) (2nd switch-off circuit).
The wiring instructions shown in Fig. 1 must be considered accordingly!
Buy: www.ValinOnline.com | Phone 844-385-3099 | Email: [email protected]
Show/Hide Bookmarks