Kollmorgen Operation
Information
SERVOSTAR
®
S/CD Product Family
29
Operation Information
The normal operation of the LEDs is that all are off to indicate no fault and the drive is disabled. When
the drive is enabled (Enable Input (C2 pin 10) tied to Common (C2 pin 7)) the green Enabled LED is
illuminated. Illumination of any red LEDs indicates a fault.
A special reset circuit is provide to automatically reset an Under Voltage fault condition if
power is applied after the drive is enabled. This allows separate power-up of logic and bus
voltage without the need to reset an under voltage fault.
SYSTEM I/O
Tachometer Input (C2 Pins 1 and 3)
The DC tachometer generator signals are brought to these terminals. The voltage must not exceed 100
volts. The system is normally phased such that a clockwise motor rotation causes a positive voltage on
these terminals. The tachometer signal is considered a low-level analog signal and careful routing and
shielding must be performed to minimize noise pickup. It is recommended that a shielded, twisted pair
wire be used with the shield connection tied to earth ground at the drive-end of the cable. The cable
should be routed free from noise sources such as solenoid and relay wires and the motor armature cable.
The analog signal wires should be twisted, shield pair cable run free from any noise signals such as relay
and solenoid wires as well as the motor armature and power line wires. The cable shield should be tied to
earth ground at the drive. While a shield pin (C2 pin 4) is provided, it is best to bring this drain directly to
the drive case.
Current Monitor (C2 Pin 5)
The current supplied to the motor can be monitored at this pin referenced to common (C2 pin 7). The
scaling of this output is 8 volts = drive peak current rating.
Tachometer Monitor (C2 pin 6)
The motor velocity can be monitored on this pin referenced to common (C2 pin 7). The scaling of this
output is 8-volts = motor’s rated speed.
CW and CCW Limit Inputs (C2 pins 8 and 9)
The CW/CCW Limit inputs are used to limit the ability of the motor to produce toque in the stated
direction (Assuming proper motor phasing). Each input may be tied to common (C2 pin 7) to disable
torque in that direction.
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