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Ac autotech ps-112 speed sensor

PS-112 Adjustable Speed Sensor
On application of power to the input terminals, the PS-112
begins sensing the repetition rate of the pulses being
generated by the proximity switch. If the pulse rate is
lower than the set-point adjustment, the internal relay
remains deactivated. If the pulse rate is higher than the
set point, the internal relay activates.
150 to 1500 SPM standard. Other ranges on special order.
Equal to time between any two pulses at a given set point.
Easily adjustable linear scale, locking bushing
120, 240 or 480 VAC, single or Three Phase
-10 F to 135 F (-23 C to 57 C)
Output: One SPDT and One SPST (N.C) contacts
PS112: Input impendence 4.7k pull-up to 12VDC
Logic 1: 9 to 13VDC, Logic 0: 0 to 3VDC
PS111: Input impendence 4.7k ground
Logic 1: 5 to 13VDC, Logic 0: 0 to 0.8VDC
Maximum number of pulses per minute (PPM):
PS111 - 10,000, PS112 - 100,000
+/- 2% at constant temperature
Ac autotech ps-112 speed sensor