Lenze ELCAMZIxxx4SNNPSNN (LCU122) - Manual (Page 117)

Safety engineering
Safe inputs and safe outputs
Safe inputs
7

117 EDSLCMX3024-SPS EN 5.0
Principle circuit diagram
X60
S1
S2
S3
S4
1 O1A
I1A
I2A
I3A
I4A
O2A
O1B
I1B
I2B
I3B
I4B
GO
GI1
GI2
GI3
GI4
n. c.
n. c.
n. c.
n. c.
n. c.
GO
GCL
O2B
Vcc
CLA
2
3
4
5
6
7
8
9
10
13
16
19
22
25
11
14
17
20
23
26
12
15
18
21
24
ы
ы
CLB
lcu12x_351
Fig.7-2 Ways to detect errors
8 Unrecognisable errors
7.4.3.3 Connection of active sensors
The safe sensor inputs I3A, I3B and I4A, I4B are solely suitable for active sensors.
PN-switched input signals are permissible.
The cable monitoring has to comply with the requirements of category 3. A cable
monitoring by the drive-based safety is not effected.
These errors are recognised:
ƒ Non-equivalent input signals after the discrepancy time has expired.
Principle circuit diagram
GI
IB
IA
S
M
P
SSP94SM352
Fig.7-3 Functional example of PN-switching sensor
S
Sensor
P Positive path
M Negative path