Safety device unit
OPM 520 en-GB 30
© Scania CV AB 2018, Sweden
Engine shutdown at engine
overspeed
If a signal is sent to one of the 2 engine speed in-
puts that the engine speed exceeds the limit val-
ue, the safety device unit shuts off the engine.
Override of engine shutdown
It is not possible to override engine shutdown at
engine overspeed. The engine is always shut off
in case of engine overspeed.
Indication
The red Overspeed LED lights. The red Shut-
down LED lights.
Acknowledgement
When engine shutdown has occurred: Acknowl-
edge the engine shutdown with the Acknowledge
button on the safety device unit.
SWITCH 1
SWITCH 2
SWITCH 3
SWITCH 4
SWITCH 5
SWITCH 6
SWITCH 7
SWITCH 8
SWITCH 1
SWITCH 2
SWITCH 3
SWITCH 4
SWITCH 5
SWITCH 6
SWITCH 7
SWITCH 8
SHUTD
O
WN
F
A
UL
T
SWITCH 1 SWITCH 2 SWITCH 3 SWITCH 4 SWITCH 5 SWITCH 6 SWITCH 7 SWITCH 8
S
T
A
TUS
PO
WER
CRANK CU
T
OFF
R
UNNING
T
A
CHO 1
T
A
CHO 2
SHUTD
O
WN
O
VERRIDE
B
UZZER
COM 1
COM 2
COM 3
SHUTD
O
WN
O
VERRIDE
A
CKN
O
WLEDGE
COM 3
CONFIGUR
A
TION
ETHERNET
shutd
o
wn unit
RELEASE
SHUTD
O
WN
O
VERSPEED
SHUTD
O
WN COIL
SHUTD
O
WN
O
VERIDE
SHUTD
O
WN
CRANK
CU
T
OFF
B
UZZLER
F
A
UL
T
R
UNNING
COM 1
DCU LINK
COM 2
RS 485
MOD
B
US
R
TU
A
CKN
O
WLEDGE
O
VERSPEED
TEST
COM 4
USB
T
A
CHO 2
T
A
CHO 1
S
U
P
P
L
Y
1 24V
4 24V
6 24V
20V
70V
50V
3
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
H
L
H
L
SHUTD
O
WN COIL
348 584
Safety device unit.
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