standexelectronics.com

Datasheet

Rev CED

Page 2

+1 970.879.9900 | sensorsales@standexelectronics.com

OTHER OPTIONS

As well as these Ferrous Target Speed Switches, we offer Magnet / Magnet Tape

activated Speed Switches, and Gear Tooth Speed Switches designed to work

with standard gears. We have options for relay outputs, NPN outputs, and TTL

outputs.

Note: Check our website or contact us to discuss any of our magnetic speed,

count, and position detection sensors.

S18-SSTHS1-R5SA5-30

Magnet Detecting Speed Switch

OTHER MATING CONNECTORS AND CABLES AVAILABLE

Absolute Max Limits

Min

Max

Unit

Supply Voltage, Vcc-Gnd

-32

+32

Volts

Voltage at Output

-.3

30

Volts

Sink Current into Output

-

50

mA

Short Circuit Prot. Vout-Gnd

-

Indef.

Minutes

Short Circuit Prot. Vout-+Vcc

-

None

Minutes

Electrical Specifications Conditions

Min

Max

Unit

Temperature Range

Operating

-40

+110

Deg C

Supply Voltage, Vcc

Over temperature

+8

+30

Volts DC

Supply Current

Into Vcc

2.5

12

mA

Internal Pull up Resistor

Vcc to +5V

4.9

5.1

kOhms

Vol, Low Level Vout

Vcc = 12V, Rload >100k

0.0

0.7

Volts

Voh, High Level Vout

Vcc = 12V, Rload >100k

11.75

12

Volts

Overspeed TRIP Frequency Output goes low above

28

31

Hz

Underspeed Release Freq. Output goes high below

24

27

Hz

ESD (like product qualified) Nondestructive

-

2000

Volts

EMI (like product qualified) 20k to 1 G Hz

-

20

V / M

Grey shaded specs are 100% Final tested before shipping

Sensor Characteristics – S Pole Sensitive

Output State at 0 Speed: High (Transistor Off)

Operate Point Over Temp

100% Tested at 25°C before shipping

15 G

55 G

76 G

Release Point Over Temp

5 G

35 G

57 G

Hysteresis Over Temp

5 G

20 G

28 G

TRIP Frequency Accuracy,

Output LOW

.98%

1.0%

1.01%*

RELEASE Frequency Accuracy,

Output HIGH

.99%*** 1.0%

1.02%

STOP DETECT TIME, Output

returns high after sudden stop

10ms(Typical)

* Gap the sensor to make sure it sees >77 G

when close, <17 G when far.

** Output is LOW if teeth are passing by faster

than 1.02 * Trip Frequency.

***Output is HIGH if teeth are passing by slower

than 0.99 * Release Frequency

Rev C

Connections Chart

Red Vcc

Black Ground

Green Pulse Vout

White Switch Vout

S18-SSTHS1

Environmental Specifications

Corrosion Resistance

500 hours salt spray ASTM B-117

Installation Torque

60 Foot-Pounds Maximum

Enclosure

Nema 1,3,4,6,13 & IEC IP67

Vibration

10 G’s 2 to 2000 Hz Sinusodal

Mechanical Shock

100 G’s, 11 mS Half-Sine

Convert RPM to Hz

Over/Under Speed Trip Points are in Hz, pulses per second.

To convert RPM (Revolutions per Minute) to Hz, you need

to know the target’s pulses per revolution, “N”. A target

with 2 S pole magnets will produce 2 pulses per

revolution, so N=2.

Hz = RPM * ( N / 60 ). Or RPM = Hz * ( 60 / N).

Example: Using 2 magnets and a 30 Hz trip point,

RPM = 30 * (60 / 2) so the output

switches low at 900 RPM.