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HD9063, OS77D AND SS300 Speed Switches
HD9063, OS77D AND SS300

Murphy Electronic Speed Switches are available in various configurations to cover a wide variety of applications.

These compact devices receive their input signal from various sources depending upon the particular speed switch model and application. 

They are available in single or dual switch point models, and the switch point(s) are field adjustable. 


Models are available in self-contained enclosures and as PC-board design for inclusion in your control cabinet. 

All Murphy speed switches are designed to operate in harsh environments and have high electrical noise immunity.

HD9063 Specifications

Power Supply: Voltage: 8-30 VDC. Maximum Current: 150 mA.

Frequency Signal: (Voltage, Magnetic Pickup Signal Models):
  • Minimum: 0.35 Vrms. 
  • Maximum: 60 Vrms.
Maximum Current, Magnetic Pickup Signal Models: 4.8 µA.
Adjustment Range, Magnetic Pickup Signal Models:
  • Crank Disconnect: 250-6,000 Hz.
  • Overspeed: 1,100-10,000 Hz.
Reset Differential, Magnetic Pickup Signal Models:
  • Crank Disconnect: Dropout 160 Hz ± 5%.
  • Overspeed: 200 Hz Differential.
Output: Relay Contact, SPDT, Resistive Load: (2) 5 A 30 VDC.

Adjustment: (2) 270°–turn potentiometer.

Temperature Range: 14 to 158°F (-10 to 70°C).

Shipping Weight: 2 lbs. (0.90 Kg).

Shipping Dimensions: 10 x 9 x 6 in. (254 x 229 x 152 mm).

OS77 Specifications
Power Supply: Voltage: 7-28 VDC. Maximum Current: 100 mA.

Frequency Signal:

Voltage, Magnetic Pickup Signal Models:

  • Minimum: 1.2 Vrms,
  • Maximum: 30 Vrms

Voltage, Distributor Ignition Models:

  • Minimum: 6 Vrms,
  • Maximum: 30 Vrms

Maximum Current, Magnetic Pickup Signal Models: 0.12 mA
Maximum Current, Distributor Ignition Models: 0.12 mA
Adjustment Range, Magnetic Pickup Signal Models: 1000-10,000 Hz
Adjustment Range, Distributor Ignition Models: 40-400 Hz

Reset Differential, Magnetic Pickup Signal Models:

  • Non-recrank model: 10 Hz Differential,
  • Recrank model: dropout 54 Hz

Reset Differential, Distributor Ignition Models:

  • Non-recrank model: 10 Hz Differential,
  • Recrank model: Dropout 2.4 Hz

Output: Transistor Sink to Ground Resistive Load: 2 A, 28 VDC

Adjustment: 270°–turn potentiometer

Temperature Range: -13° to 185°F (-25° to 85°C)

Shipping Weight: 1 lb. (0.45 Kg)

Shipping Dimensions: 8 x 4 x 4-1/2 in. (203 x 102  x 114 mm)


SS300 Specifications:

Power Requirements: 12 VDC (9-16 VDC). 24 VDC (18-30 VDC).

Frequency Signal:  Voltage (all models) -- Minimum Input Voltage Signal: 4.5 Vrms.;  Maximum Input Voltage Signal: 50 Vrms.

Maximum Current   12V 24V
Pull In              46 mA 46 mA
Pickup only      10.5 mA 16 mA
 

Frequency Range in Hz                   Model Number
25-2000                                              SS300-LF
                                                             SS300-AD-LF
625-9000                                              SS300-AD 
                                                             SS300

Reset Differential Magnetic Pickup Signal Models:

  • “Standard Models: 2 Hz Differential.
  • “AD” Models (Adjustable Differential): 650-8900 Hz Adjustable

Reset Differential Alternator Models:

  • “LF” Models (Low Frequency): 2 Hz Differential.
  • “AD-LF” Models (Adjustable Differential Low Frequency): 50-1900 Hz Adjustable.

Output: Relay contact, SPDT, resistive load, 6 A, 30 VDC.

Time Delay: When terminal 7 is grounded, the relay operation is delayed for 
2-6 seconds after rpm set point is reached.

Adjustment: 20–turn potentiometer(s).

Temperature Range: -4° to 185°F (-20° to 85°C).

Relative Humidity: 0 to 95% Non-condensing.

Case: Black, ABS plastic.

Shipping Weight: 0.24 lb. (108 g).

Shipping Dimensions: 8 x 4 x 4-1/2 in. (203 x 102 x 114 mm).


Product Original Page


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