DM960 - Advanced Features

Programmable Full Scale Offset for Easy Set-Up

You can mount the resolver on the machine without any con-cern for mechanically matching the resolver zero to the machine zero. Once the resolver is coupled to the machine shaft, the only thing you have to do is to bring the machine to a known position, say home position, and set an offset number using the front panel thumbwheel switches until the display reads zero. Now the resolver zero is aligned with the machine zero. This is especially useful during initial start-up in that it reduces the set-up time. The offset can also be used to com-pensate for any wear on the machine.

Variety of Outputs, Built-in PC-Handshake, permit Interface to any PLC

BCD, natural Binary, or Gray Code output formats are avail-able with a choice of TTL, PNP (sourcing) transistor or NPN (sinking) transistor outputs. Optional PLC synchronization circuit provides an error-free method of interfacing BCD posi-tion 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 The PC-Handshake, being an edge-triggered device, allows stable data to be read every scan by a PLC.

Multiplexing Capability

The TTL type of outputs have multiplexing capability, which allows more than one decoder to be connected to the same control unit for multi-axis applications. For multiplexing PNP or NPN type outputs, consult the factory.

High-Resolution, Up to 17-bit Total

The DM960 is a multi-turn system with a resolution of 10-bits-per-turn over 64 or 128 turns. This means 17-bit resolution over total travel with 128-turn system or 16-bit resolution with 64-turn system. The high-speed ratiometric-tracking converter utilized in the DM960 decoder series permits operation at speeds up to 1800 rpm and still assures 1 part in 1000 per turn resolution.

Highly Noise-immune Circuitry

The ratiometric tracking converter technique employed for resolver-to-digital (R/D) decoding provides the best protection against electrical noise generated by power line transients, radio frequency interference, and varying ground potentials. A ratiometric converter is practically immune to temperature variations and line frequency changes. Optional optical isolation adds another layer of protection and enhances system integrity.

Extremely Rugged and Reliable Resolver as Position Transducer

The DM960 resolver decoder combines the ruggedness of resolver and reliability of an advanced solid-state control. The rugged heavy-duty NEMA 13 (IP54) resolver can be mounted on a machine shaft in any hostile industrial environment, such as mechanical shock, vibrations, extreme humidity and tem-perature changes, oil mists, coolants, solvents, etc. And the resolver-to-digital decoder can be mounted up to 2500 ft (762 m) away in a control panel.