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3
Function chart
4
Terminal diagram
MSI-SR-CM42R
5
Contact load derating
The total current I
applies to the two enabling current paths of a
2
relay group. See terminal diagram.
Example MSI-SR-CM42R-xx: (Derating curve, see right)
Permanent current via contact 13/14, 23/24, 33/34: 2 A
Permanent current via contact 43/44: 1 A
Total current I
Relay group K1 = (2 A)
2
Total current I
Relay group K2 = (2 A)
2
Component can be used within the entire temperature range, as the
total current I
for each relay group is ≤ 8 A
2
6
Relay service life / load limit curve
Relay service life
Leuze electronic GmbH + Co. KG
info@leuze.de
• www.leuze.com
MSI-SR-CM42R
LED relay group K1, LED relay group K2
Y1/Y2, Y3/Y4 signalling current path
13/14, 23/24, 33/34, 43/44 enabling current paths
t
= response time / t
A
R
+ (2 A)
= 8 A
2
2
2
+ (1 A)
= 5 A
2
2
2
.
2
Switching cycles
In der Braike 1 D-73277 Owen
B1,B2/A2 control input
= release time / t
= restart time
W
Derating curve
A derating is only necessary for the MSI-SR-CM42R when
both relay groups are activated simultaneously.
Derating determined at U
Load limit curve, ohmic load
Switching current I [A] Safe deactivation, no standing
Tel. +49 (0) 7021 573-0
t
t
A
R
t
W
Ambient operating temperature, °C
= 30V
B
arc, max. 1 switching cycle/s
We reserve the right to make changes
03/2020 - 50134629-02 - 5/18
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