Murphy Annunciators and Magnetic Switches Switch User Manual


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518APH
Allows for SWICHGAGE
®
and/or
N.C. contacts to be wired “Closed Loop” (in
series). Any contact open or SWICHGAGE
®
contact close in the circuit shunt trips the
518APH. Specify 12 or 24 VDC. Contacts 10
amps 24V. 14 amp fuse.
518E
Same as 518APH but recommended
for high vibration application where nuisance
shutdowns typically occur due to higher than
normal vibrations (ie. wood chippers) 12 Volt
only.
R
GNO NC
SW1 SW2
B
520APH
Same as 518APH except with 30
second time delay before trip on one SWICH-
GAGE
®
contact input but immediate trip on the
second SWICHGAGE
®
contact input. Typical
use is for immediate stop of engine from oil
pressure or coolant temperature, but delayed
shutdown from alignment switches on center
pivot irrigation system. Specify 12 or 24 VDC
and length of time delay. Time delays are
available from 5 to 120 seconds. Contacts 10 amps
24 V. 14 amp fuse.
R
GNO NC
SW1 SW2
B
TD
521PH
Use with N.C. SWICHGAGE
®
or
switches to ground magneto or CD ignition
when tripped. Trip coil energized to run, de-
energized to shutdown when N.C.
contacts open. Specify 12 or 24
VDC. Contacts 10 amps 24 V.
G SWNC C
822PH
Used in Murphy TR-assemblies as
master disconnect. 24 VAC coil energizes
when SWICHGAGE
®
contact closes to
ground; breaks and makes circuit when
tripped. Manual reset.
NO NC C SW
M4264 Series
Detects loss of
magneto/CD ignition output and transfers con-
tacts for customer use. Contacts 10 amps; 48
VAC/VDC.
M42641CD transfers SPDT dry contacts when
tripped.
760A/760AF/761APH
Use for distribu-
tor ignition or diesel. Time delay lockout of
SWICHGAGE
®
contacts on start-up only; cus-
tomer wired for delayed or immediate trip on
shutdown. Breaks and makes circuits when
tripped. 760A resets automatically when the
shutdown signal is removed or power is
removed. 761APH has manual reset. 760AF is
760A with inline fuse. Must specify 12 or 24
VDC, and length of time delay. Optional time delays: 15, 30
(standard) or 60 seconds. Contacts 10 amps 24 V. 14 amp
fuse. Models 760A and 761APH carry the CE mark.
NOTE : The 760A cannot be adequately protected by a circuit breaker in a dead short
condition with a battery as the power source. The circuit breaker will take a finite
amount of time to react, during which time the circuit board of the 760A will be dam-
aged beyond repair. Fuses are the optimal method for protecting the 760A.
G NO NC BS
TD
IGN
NO CBY NC
IGN
Sensing
Circuit
R129A
A SPDT relay with 10 amp dry
contacts. Specify 12 or 24 VDC. Contacts 10
amps 24 VDC. 14 amp fuse.
NO NC S BG
ETS30S
All solid-state time delay for energized to stop circuits such as
solenoids. When a shutdown signal is received, the ETS30S applies power to
the shutdown device for 30 seconds and then disconnects the power. Input
power 12 or 24 VDC.
518PH
Aallows for SWICHGAGE
®
and/or
N.C. contacts to be wired “Closed Loop” (in
series). Any contact open or SWICHGAGE
®
contact close in the circuit shunt trips the
518PH. Specify 12 or 24 VDC. Contacts 10
amps 24V. 14 amp fuse.
R
GNC
SW1 SW2
B
* Complies with EMC Council directive 89/336/EEC regarding electromagnetic compatibility.
*
*
MS2111
Replaces 221PH w/72 ohm coil.
Used with NICS-78 non-incendive control
system. Service part only.
6 2 3
5
1 4
*
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