Product Description:

The 800-299A is a compact DC servo amplifier produced by Copley Controls within the DC Servo Amplifiers series. The module accepts low-voltage direct-current power and converts it into a regulated bidirectional output that drives brushed servo motors in positioning tables, pick-and-place actuators, and other closed-loop axes. By monitoring motor feedback and modulating armature current, the unit supplies the torque and speed commands generated by a motion controller while protecting the load from overcurrent and supply deviations.

For integration on 24–48 V buses, the amplifier accommodates an input supply spanning 18–55 VDC. Under rated operating conditions, it draws 5 A continuously from the DC link and reproduces the command waveform at the motor terminals with a continuous output capability of 5 A. The amplifier can also deliver transient bursts of up to 10 A peak during acceleration. Internal switching circuitry limits the motor voltage to 50 VDC, helping the connected motor remain within its insulation limits. Command signals arrive through differential reference lines labeled REF+ and REF−, allowing ±10 V velocity or torque inputs from standard analog controllers without ground-loop interference.

Wiring is separated into signal and power groups to keep low-level feedback paths apart from motor current connections. A control header with 14 pins carries enable, fault, and limit lines together with encoder and tachometer returns, while the high-current block uses 5 pins for the DC bus, motor, and chassis connections. For velocity feedback, the board provides a tachometer port on a 10-pin plug that accepts compatible speed-feedback signals. Incremental position data enters through encoder inputs that decode Channel A/B quadrature pulses, supporting closed-loop resolution down to a single motor count. The separate feedback connections allow the amplifier to work with analog tachometer signals or incremental encoder data according to the control arrangement used by the axis.