Murphy Official Manual for Switch Models: 518APH, 518PH, 760AF-30-12, MS2111

				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
		R		518PH. Specify 12 or 24 VDC. Contacts 10
G	NC	SW1	SW2 B	amps 24V. 14 amp fuse.
				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

760A/760AF/761APH Use for distribu-
tor ignition or diesel. Time delay lockout of
SWICHGAGE® contacts on start-up only; cus-			TD
tomer wired for delayed or immediate trip on
shutdown. Breaks and makes circuits when
tripped. 760A resets automatically when the
	G NO NC		S B
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.

		518APH. Specify 12 or 24 VDC. Contacts 10
		amps 24V. 14 amp fuse.
	R
GNO NC	SW1 SW2 B	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.

NO NC C SW

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.

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		TD
use is for immediate stop of engine from oil		R
pressure or coolant temperature, but delayed	GNO NC	SW1 SW2 B
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.

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.

	Sensing
	Circuit
BY	IGN	NO	NC	IGN	C

G NC SW C

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 NO NC S B

R129A A SPDT relay with 10 amp dry contacts. Specify 12 or 24 VDC. Contacts 10 amps 24 VDC. 14 amp fuse.

6 1 2 3 4 5

MS2111 Replaces 221PH w/72 ohm coil. Used with NICS-78 non-incendive control system. Service part only.

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.

*Complies with EMC Council directive 89/336/EEC regarding electromagnetic compatibility.

M-6797B page 3 of 4