Product Description:

The 5131 is a single-axis DC servo amplifier manufactured by Copley Controls for the DC Servo Amplifiers series. It converts low-level command voltages into regulated motor current for precise torque and speed control. The amplifier can operate brushed or brushless DC motors used in positioning stages, conveyors, and material-handling equipment. Its single-axis design allows one motor to be regulated independently within an industrial automation system. The current-control architecture responds to command signals from an external motion controller while maintaining stable motor output under changing mechanical loads.

With a small-signal bandwidth of 3 kHz, the amplifier tracks rapid command changes in high-speed servo loops. Its power bridge operates at a switching frequency of 25 kHz, moving switching noise beyond many mechanical resonances and simplifying filter design. The unit delivers a continuous load current of 15 A while operating from a ±85 V bus, providing steady torque for compatible motors. An output resistance of 0.15 Ω limits internal voltage loss, allowing most of the available bus voltage to reach the motor terminals. The differential reference port has a gain of 1 V/V and an input impedance of 94 kΩ. This high impedance minimizes loading on the upstream motion controller and helps preserve command-signal quality over longer cable runs.

During acceleration, the output stage can supply a peak current of 30 A at ±83 V, helping the motor overcome load inertia. Control lines recognize a logic-high signal above 2.5 V, allowing direct connection to common 3.3 V or 5 V control systems. The analog reference inputs tolerate signals up to ±20 V, providing headroom for command sources without exceeding the input range. The chassis weighs 1.1 lb (0.48 kg), which reduces the mounting load in densely populated control panels or on moving equipment. Its compact mass also makes the amplifier suitable for installations where enclosure space and supported weight are limited.