5 Application examples
5.2 Single-channel controlled stop application (cat. 3, SIL 3, PL e)
EMS2…-SWD Electronic motor starter
10/19 MN120008EN
www.eaton.com
41
5.2 Single-channel controlled stop application (cat. 3, SIL 3, PL e)
Figure 13:Single-channel controlled stop application with error prevention
The EMS2-D(R)OS-…-SWD motor starter is used in combination with an
ESR5-series safety relay.
A cable for the safety-oriented enable (EN+) is connected via the safety relay.
For the enable, the internal voltage on the ter and - is used. This type
of wiring is then only accepted if the EMS2-…-SWD motor starter and the
safety relay are located in the same control panel.
The background to this is a possible cross short-circuit which can lead to a
bridging within the controlled stop circuit. This is more probable for cables
which are located outside of the control panel than for a wiring within the
same control panel.
SmartWire-DT
8
L1
L2
L3
0 V DC
24 V DC
F1
3/
L2
1/
L1
5/
L3
2/
T1
4/
T2
6/
T3
M
3 ~
S2
S2
S11 S12 S21 S22
+
- EN+ EN-
13
23
31
S33 S34
14
24
32
S3
W1
V1
U1
EMS2-D(R)OS-…-SWD