SS-97028N page 3of 4

TYPICAL WIRING INSTALLATION (continued)

Non Latching Overspeed Switch with

Air Shutoff Solenoid

A non-latching overspeed switch with air shutoff solenoid application is

shown in Figure 6. The air shutoff device must be manually reset to

open/run position.

Non Latching Overspeed Switch with

518PH and Fuel Solenoid

A non-latching overspeed switch with an 518PH magnetic switch and a

fuel solenoid is shown in Figure 7.

Dual Set Point Oil Pressure Switch

A dual set point oil pressure switch is shown in Figure 8.

SS300 with AT-67207

Throttle Controller

The SS300 with the AT-67207 throttle control is used to limit speed as

shown in Figure 9. Engine speed is controlled by OPL pressure

SWICHGAGE®setting and the AT-67207 throttle control. The throttle

control moves as long as OPL contact is made. If OPL is calling for an

increase in speed and engine speed exceeds the setting of the SS300, a

slow signal is applied to AT-67207. The throttle control will stop if both

fast and slow signals are applied. Engine speed at a constant load will

not exceed the limit set by the SS300.

SS300-AD with Clutch Engager

The SS300-AD can be applied with a Murphy CO-3 engager (Figure 10).

The circuit is designed to engage a clutch after engine speed has increased

to a preset RPM (Example: 1200 RPM), and disengage clutch when

engine speed has decreased to idle (Example: 600 RPM). The adjustable

differential SS300-AD relay is set to pull in at 1200 RPM and drop out at

600 RPM.

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Battery
Air Shutoff
Energized to
Close
Speed
Signal
+--
SS300
4 INPUT
3
2
1
5 – BATT.
6 + BATT.
7
8
SPEED
GND. FOR
T/D
POS. TO
LATCH
Battery
Fuse
Oil
Pressure Water
Temperature
Fuel
Solenoid
518PH
TATTLETALE®
Speed
Signal
G
B
NC
SW1
SW2
+--
SS300
4 INPUT
3
2
1
5 – BATT.
6 + BATT.
7
8
SPEED
GND. FOR
T/D
POS. TO
LATCH
Battery
Speed Signal
To alarm or
shutdown
Circuit
On - Off
Switch
N.C.
N.O.
C
+--
SS300
4 INPUT
3
2
1
5 – BATT.
6 + BATT.
7
8
SPEED
GND. FOR
T/D
POS. TO
LATCH
Battery
AT-67207
Battery
Slow
Fast
Speed
Signal
Pressure
SWICHGAGE®
+-- SS300
4 INPUT
3
2
1
5 – BATT.
6 + BATT.
7
8
SPEED
GND. FOR
T/D
POS. TO
LATCH
Battery
CO-3
Common
Disengage
Engage 1
2
3
4
5
Speed
Signal
+-- SS300
4 INPUT
3
2
1
5 – BATT.
6 + BATT.
7
8
SPEED
GND. FOR
T/D
POS. TO
LATCH
CAUTION:
If replacing an SS100 Seriesmodel with an SS300 Series model, note thesignificant wiring differences on the SS300terminals: 5, 6, 7, and 8. Wire your SS300 accordingly.