HD9063, OS77D, SS300 Electronic Speed Switches
速度开关

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.

Series Models Available
SS300 Series: Single set point speed switch with SPDT relay dry contact output.
SS300 (std. model)
SS300-LF (low frequency)
SS300-AD (adjustable differential)
SS300-AD-LF (low frq. & Adjst. diff.)
OS77D Series: Single set point speed sensing module, with a transistor output.
HD9063 Series: Dual set point speed switch in a pc board configuration and relay outputs.
. HD9063 Model
Crank Disconnect: 250-6,000 Hz
Overspeed: 1,100-10,000 Hz
. HD9063-USOS Model
Underspeed: 200-5,800 Hz
Overspeed: 1,100-10,000 Hz

Reset Differential, Magnetic Pickup Signal Models
. HD9063 Model
Crank Disconnect: Dropout 160 Hz ± 5%
Overspeed: 200 Hz Differential
. HD9063-USOS Model
Underspeed: +5% of Set point Differential
Overspeed: 155 Hz ± 10% 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)
Model Length Length Size
MP3298* 3 in. (76 mm) 3 in. (76 mm) 5/8-18 UNF
MP7906. 3 in. (76 mm) 3 in. (76 mm) 3/4-16 UNF
MP7905.. 4-1/2 in. (114 mm) 4-1/2 in. (114 mm) 3/4-16 UNF
*Replaces 20-01-0080 and MP100. Lead wire hookup (12 in. [305 mm]).
.Replaces 20-01-0081. Lead wire hookup (12 in. [305 mm]).
..Replaces 20-01-0082. Lead wire hookup (12 in. [305 mm]).