5131CE Copley Controls
Wake Industrial LLC is not an authorized distributor of this product.
The Copley Controls 5131CE is a DC Servo Amplifier that belongs to the DC Servo Amplifiers series. It delivers a continuous current of 15 Amps and a peak current of 30 Amps, with a PWM switching frequency of 25 kHz. The unit weighs 1.1 pounds and has a reference input resistance of 94 kilo-ohms.
Internal Product Review
The 5131CE is a Copley Controls DC servo amplifier with 15 A continuous current and 30 A peak current. A 25 kHz PWM switching frequency and 3 kHz small-signal bandwidth support crisp current control and stable dynamic response. This amplifier stands out as a capable motion-control component for demanding servo applications.
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Product Description:
The 5131CE is a single-axis DC servo amplifier manufactured by Copley Controls for the DC Servo Amplifiers series. In an automation cell, it sits between a motion controller and a brushed DC or voice-coil servo motor, converting low-level command voltages into regulated armature current so that position, velocity, or force loops can be closed precisely. By handling power conversion and current regulation, it allows compact actuators to operate without discrete analog power stages. This arrangement also centralizes motor current control within a compact panel-mounted device.
At the power stage, the unit supplies up to 15 A of continuous motor current, which sets the maximum steady-state load it can handle without thermal overload. During acceleration, it can reach 30 A, adding headroom for inertia mismatch or quick step movements. These currents are switched by a pulse-width-modulated bridge at 25 kHz; the high carrier frequency lowers audible noise and current ripple. Internal compensation provides a small-signal bandwidth of 3 kHz, enabling tight current loops for fast-tracking applications. The output impedance is only 0.15 Ω, so the voltage drop remains low when large currents flow. The power stage works with medium-voltage DC buses commonly used in industrial machinery.
The command interface accepts reference signals up to ±20 V and presents an input resistance of 94 kΩ, reducing the load on upstream motion cards. Current demand is interpreted through a scale of Ipeak divided by 6 V, while the input amplifier gain remains ×1. Logic inputs are pulled high through 10 kΩ and switch at 2.5 V, allowing direct connection to 5 V TTL outputs. Fault status is provided through an open-collector line connected to +5 V, and the amplifier retries operation every 50 ms to clear transient events. The aluminum housing weighs 1.1 lb, allowing it to be mounted on panels without extra bracing. Its compact housing helps conserve enclosure space while maintaining access to the command, logic, and fault connections.
