Azonix-Dynalco, 3690 N.W. 53rd Street, Fort Lauderdale, U.S.A.
DIP SWITCH SETTINGS
Switches 1 & 2 set the
full-scale frequency range Switches 3 & 4 set the
overspeed relay logic
DIP
SW 1 DIP
SW 2 Full-Scale
Range DIP
SW 3 DIP
SW 4 Relay
Logic
OFF OFF =0 –11,200 Hz ON N/A =Ener
izes
Above
Setpoint
OFF ON = 0 –5,000 Hz OFF N/A =De-Ener
ize
Above
Setpoint
ON ON = 0 –1,000 Hz N/A ON = Latches
N/A OFF =Does not
Latch
Installation and Calibration Instructions
SW-200B Speed Switch
1. Installation: Mount the SW-200B to a secure bracket off the engine. If
on-enginemountingisnecessary,shockmountsarerecommended.Wire
according to connection diagram on reverse. Shielded cable is
recommended.Shieldshouldbebroughttogrounddirectly.TheSW-200B
will work with most magnetic pickups provided the signal amplitude is
greater than 50 mVrms and less than 70 Vrms. Mount pickup according
to manufacturer’s instructions.
2. Calibration: Determine the setpoint frequencies from an RPM value
using the following formula:
Frequency = RPM x No. of Teeth (Holes)
60
A. Verify the current calibration: usea signalgenerator. Connect ittothe
SW-200B magnetic pickup input.
B. Confirm the DIP switches are properly set for the frequency range and
overspeed relay logic desired. (See chart below.)
C. Setthesignal generatoroutput toatleast 10%below thelowestsetpoint.
Slowly increase the frequency. Using an ohmmeter across the relay
contacts, determine the frequency at which each relay changes state.
a. Change a setpoint: removetheappropriate accessholescrew toreach
the setpoint's relay adjustment trim pot.
b. Setthe signalgeneratortothefrequency atwhichtherelayshouldchange
state. Connect it to the SW-200B magnetic pickup input.
c. Using a small, flat screwdriver, adjust the trim pot for the appropriate
relay until the relay changes state.
d. Decrease the frequency, then slowly increase it to verify that the relay
trips at the appropriate point.
Replace the access hole screw
.
SW-200B is a trademark of Dynalco Controls
DYNALCO CONTROLS RESERVES THE RIGHT TO CHANGE THESE SPECIFICATIONS WITHOUT NOTICE.
© 2002 Azonix-Dynalco 145F-12044, Rev 0
