Rockwell Automation 57C411 Resolver Input Module User Manual

Page 10

2Ć2

The module produces a26 volt rms 2381 Hertz sine wave reference

output signal which is capable of driving a 400 ohm load. This

reference signal is transformerĆisolated and shortĆcircuit protected

through acurrent limiter. The module also receives 11.8 volt rms sine

and cosine signals from the resolver, as well as the 26 volt rms

reference.
There are 5 LEDs on the faceplate of the module. The top LED,

labeled DIRECTION, indicates the direction of rotation of the resolver.

When it is on, the resolver is rotating clockwise. The next LED,

labeled FDBK OK, indicates that the resolver is connected to the

module. The next LED, labeled CCLK OK, indicates that the common

clock is on. The fourth LED, labeled IPS OK, indicates that the

isolated power supply is working. Finally, the bottom LED, labeled

OK, indicates whether the common clock is on and the isolated

power supply is functional. See figure 2.3.

100k

+12V

2200 pf

40106

Figure 2.1 Ć External Strobe Input Circuit

Figure 2.2 Ć Low Leakage Requirement for Devices Driving Strobe Input