Front-Panel-Selectable Output Formats: BCD, Binary, or Gray Code
The DM7 is an extremely versatile resolver to digital decoder. Now you do not have to define the output format at the time of ordering the unit. Depending upon your application, the output format such as BCD, Natural Binary, or Gray code can simply be selected from the front panel keypad. This means one unit for various applications.
Built-in PC synchronization
PC synchronization is built in as standard in DM7
resolver-to digital decoder. Depending upon the application it can be selected from the front panel keypad to operate with or without PLC synch circuit. When selected to operate with PLC synch circuit, it provides an error-free method of interfacing BCD or binary position data from the decoder to any PLC in the market. Upon receipt of a data transfer command from the PLC the stable data is latched and made available to the PLC.
When selected to operate without PLC synch circuit (transparent or
Microfreeze mode), the position data is continuously updated. At the data transfer command from a microcomputer, the data is latched for 100 ±10 ps to enable the microcomputer to read the information.
Self-Diagnostics with Fault Output
The DM7 is provided with an internal self-check circuit that continuously monitors if the microprocessor is not in reset, input 120 VAC power, DC power supplies, resolver cable, and output enable circuit. In case a fault occurs in any one of the above critical functions, the unit goes into fault mode and a transistor output changes state from ON to OFF. For failsafe operation, the fault output is ON for normal operation and turns OFF when a fault occurs. During the fault mode all outputs are disabled automatically. |
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Highly Noise Immune Circuitry
The ratiometric tracking converter technique employed for
resolver-to digital decoding provides the best protection against electrical noise generated by power line transients and varying ground potentials. This decoding method is inherently
immune to temperature changes and line frequency variations. The optical isolation adds an additional layer of protection against electrical noise and enhances the environmental integrity of the system.
Built-in Tachometer & Over/Under Speed Switch
The shaft RPM is continuously displayed on the front panel. Two additional outputs, one over-speed and the other
under-speed, are provided. The reference speed values are entered from the front panel.
Program Security
A supervisory input is needed to make any changes to the program to protect against unauthorized tampering.
Rugged and Reliable Resolver as Position Transducer
The DM7 series of resolver decoder combines the ruggedness of a resolver and reliability of an advanced solid-state control. The rugged, heavy-duty NEMA 13 IP54 resolver can be mounted on a machine in any hostile industrial environment such as mechanical shock vibrations, extreme humidity and temperature changes, oil mist, coolants, solvents, etc. And the resolver-to-digital decoder can be mounted up to 2500 feet away in a control panel.
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