2 Engineering
2.3 Safety shutdown with long lifespan
Elektronischer Motorstarter EMS/Electronic Motor Starter EMS 04/15 MN03407009Z-DE/EN www.eaton.com 45
2.2.2 Dual-channel switching and control current path emergency stop (reduced lifespan)
Figure 5: Dual-channel main and control current path emergency stop (reduced lifespan)
S2 = Emergency stop, S3 = Reset
Emergency stop (dual-channel) – (as per cat. 3, SIL 3, PL e): EMS-ROS-…
with higher-level safety relay combination
2.3 Safety shutdown with long lifespan
In applications in which the safety shutdown is a normal operating state
(such as is in the case of protective door and two-hand control applications),
a circuit like the ones shown in ￫ Section 2.3.1, “Main and control current
path emergency stop (single-channel)“ and ￫ Section 2.3.2, “Main and con-
trol current path emergency stop (dual-channel)“ must be used. In this kind
of configuration, the supply voltage is not switched. Instead, the actuating
circuit is switched.
Both single-channel and dual-channel configurations can be implemented.
For this purpose, the input wiring for the clockwise/anticlockwise activation
terminal and the corresponding ground must be routed through the safety
relay as well.
L1
L2
L3
N
PE
GND
EMS-ROS-...
ESR5-NO-21-24 V AC-DC
24 V DC
GND
24 V DC
F1
3/
L2
1/
L1
A
2
A
1
E R L
5/
L3
2/
T1
4/
T2
6/
T3
95 96 98
M
3 ~
PE
W1V1U1
MAN
RES
AUT
S2
S2
A1 S11 S12 S21 S22
13 23 31
A2 S33 S34
14 24 32
S3
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