Product Description:

The 7225X1 is a DC servo amplifier produced by Copley Controls within the DC Servo Amplifiers series. It drives brushed servo motors by translating a differential ±10 V analog command into a controlled PWM output, letting machinery regulate torque or velocity with closed-loop precision. With a 7.35 × 4.4 × 1.40 in footprint and a weight of only 1.48 lb, the module fits densely populated motion racks and supports positioning stages, conveyors, or labeling heads that demand fast current response.

The amplifier can source a continuous motor current of 10 A, representing the steady-state load it can support without exceeding thermal limits. During acceleration, it delivers a peak current of 25 A for up to 2.4 s, providing extra capacity for overcoming static friction or inertial loads. Thermal power dissipation under full electrical load reaches 60 W; this value helps determine enclosure airflow and heat-sink requirements. A switching frequency of 25 kHz keeps current ripple low and moves acoustic noise beyond the audible range, which is useful in applications that share cabinets with sensitive equipment. The low 0.2 Ω on-resistance of the output transistors minimizes internal voltage drop, improving efficiency and reducing self-heating.

Small-signal bandwidth extends to 3 kHz, allowing the current loop to track rapid reference changes generated by high-resolution controllers. Protective shutdowns activate at an overvoltage threshold of 195 VDC and an undervoltage threshold of 22 VDC, preventing unintended operation when supply rails move outside safe ranges. An internal sensor disables the output when the heat sink reaches 70 °C, protecting the power stage during a sustained overload. Idle dissipation is only 7 W, reducing standby energy use. The ±10 V current-monitor output, scaled to ±25 A, allows the control system to compare commanded current with actual current without additional shunts.