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451 series
.--'-'------Irr
— c @ F a i l
L h M a u l
Adjust
°a ra
0
Souil
C I Test
/ O v e r l o a d
0
Fuse fail
11511
..-'-----)Def. fusible
PLF detection
indication
PLF detection
setting
potentiometer
PLF setting test
"Overload"
detection indication
(option only available with
PLF option)
Internal
fuse blow-out
indication
Lock by
quarter-turn
Heatsink
Figure 3.4 Front fascia of a 451 series module
3-12
451-461 User Manual
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