Installation manual

Danaher Motion Kollmorgen Wiring
SERVOSTAR
®
S and SERVOSTAR
®
CD Series 39
Feedback Devices
The SERVOSTAR can receive resolver, encoder (with or without halls), or sine
encoder feedback. Danaher Motion Kollmorgen offers a variety of motors with
options for these various feedback devices. The device preference and the
associated model number must be determined when the order is placed.
Resolver
The SERVOSTAR uses either single (two poles) or multi-
speed (multiple poles)
resolver feedback to monitor the motor shaft position. A resolver can be thought
of as a transformer whose output is unique for any given shaft position (an
absolute position feedback). The transformer is driven with a sinewave reference
signal. Two AC signals are returned from the resolver into the Sine and Cosine
inputs. All three of these sinewave signals are low-level and susceptible to noise.
SPECIFICATIONS
Resolver Requirements
Type Control Transmitter
Transformation Ratio 0.47
Modulation Frequency 7-8 kHz
Input Voltage (From Drive) 4.25 VAC
Max DC Resistance 120 Ohms (stator)
Max Drive Current 55mA AC-RMS
Output Voltage (To Drive) 2 VAC
CABLE LENGTHS
It is important to use properly- shielded cable and to keep it away from other
noise-radiating devices and cables. It is not recommended to run the feedback
and motor cables in the same conduit. Danaher Motion Kollmorgen has tested
cable lengths up to 75 ft. (22.9 m). without degradation of performance.
However, performance may vary, depending on motor and resolver type. Tests
were performed with standard Danaher Motion Kollmorgen cable and its low-
impedance and Danaher Motion Kollmorgen GOLDLINE motor resolver.
Please consult the factory for cable and resolver impedance specifications when
long cable runs above 250 ft. (76 m) are desired. Danaher Motion Kollmorgen
recommends twisted-shielded pair for feedback cables.