800-1844 Copley Controls
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The Copley Controls 800-1844 is a module in the Accelnet CanOPEN Modules series. It features one 12-bit analog input and eleven digital inputs, with six of these being high-speed. The module supports a current loop rate of 16 kHz and a velocity loop rate of 4 kHz, and it includes a brake output and motor temperature input.
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Product Description:
The 800-1844 is a network-ready servo drive module manufactured by Copley Controls as part of the Accelnet CANopen Modules series. It attaches directly to a CANopen fieldbus and delivers current and velocity regulation for brushless, stepper, and linear motors used in automated assembly, material handling, and electronic manufacturing equipment. By combining power amplification, feedback decoding, and communication in one compact housing, the unit simplifies multi-axis expansion in industrial automation lines.
I/O resources support precise control and diagnostics. One analog channel is converted at 12-bit resolution for external speed or torque references, and a separate motor-temperature sensing line protects the winding insulation. There are 11 digital inputs in total, six of which accept high-speed edges for position latching. The inner current loop operates at 16 kHz, while incremental encoder feedback is captured at a sustained rate of 8 Mcount/s. Service tasks such as firmware updates use an asynchronous link that reaches 115,200 baud. A single brake output releases mechanical brakes, three optically isolated outputs drive external relays, and four optically isolated inputs provide galvanic isolation from PLC logic. The velocity loop refreshes at 4 kHz to produce smooth speed transitions during changes in the command signal.
Pulse-width outputs have a minimum on-time of 220 ns, allowing high carrier frequencies without pulse distortion. When configured for step-direction control, the internal generator accepts command streams up to 2 MHz, providing direct indexing for hybrid stepper motors. The power stage can drive loads with phase inductance as low as 200 µH, so motors connected by short cables remain stable during operation. Functional safety is supported by two STO channels that remove gate power through independent paths during an emergency stop. Each channel provides a separate shutdown path, reducing the possibility that a single circuit fault will leave the power stage active.
