7228AC Copley Controls
Wake Industrial LLC is not an authorized distributor of this product.
The 7228AC is a DC servo amplifier made by Copley Controls as part of their DC Servo Amplifiers series. It features a power input of 120VAC and an analog scale of ±20V maximum, with a command input of ±10V. The amplifier includes a DB-9 female data port, has 15 motor connector pins, and a 20A time-delay fuse rating.
Internal Product Review
The 7228AC is a Copley Controls DC servo amplifier with 120VAC power input and a ±10V command input. A DB-9 female data port with 9600 default baud supports straightforward setup and dependable communications. Strong encoder support through a +5V supply makes the unit a capable choice for precise motion control.
To contact sales for pricing and lead time:
Payment Methods
Shipping Methods
Our Credentials
Product Description:
The 7228AC is a single-axis DC servo amplifier produced by Copley Controls within the DC Servo Amplifiers series. Designed to condition command signals and deliver regulated current to brushed or brushless motors, the unit interfaces between a motion controller and the motor windings in industrial automation. By providing controlled armature power and processing feedback signals, it enables precise closed-loop positioning and velocity regulation for equipment that requires accurate motion. The single-axis configuration allows the amplifier to regulate one motor independently within a coordinated automation system.
The amplifier accepts a line supply of 120 VAC, which the internal power stage rectifies and modulates to drive the motor. The command reference uses an analog differential input scaled for ±10 V, allowing most PLCs and motion controllers to command torque or velocity through standard voltage signals. Serial diagnostics are available through a DB-9 female port operating at a default rate of 9600 baud, so connected software can read status registers without additional adapters. A replaceable 20 A time-delay fuse protects the supply path by tolerating normal inrush current while opening during a sustained overcurrent condition. The analog input supports a maximum range of ±20 V for compatibility with higher-level interfaces. An auxiliary +12 V logic output can supply power to external limit switches.
Feedback wiring is handled by an encoder receiver that uses a 26LS32 differential line receiver, and the board provides +5 V encoder power at up to 250 mA maximum. For commutation, three Hall tracks arranged in a 120-degree pattern are filtered by a 10 nF capacitor network and biased through 22 kΩ pull-up resistors, which help maintain clean signal transitions at high speed. Motor phases, encoder lines, and brake leads terminate on a 15-pin connector. The DC bus enters through a separate 9-pin power block. Application input and output signals are routed through a 37-pin user interface, keeping control wiring separate from the primary power connections.
