800-1694 Copley Controls
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The 800-1694 digital loop module is manufactured by Copley Controls and is part of the XENUS Digital Loop Modules series. It supports two motor channels and provides a continuous output current of 3 Amps, with a peak output current of 4 Amps at a maximum output voltage of 55 VDC. The module features RS-232 serial interface, 14 feedback port pins, 26 input/output signal pins, and 6 power port pins.
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Product Description:
The 800-1694 is a plug-in digital loop module produced by Copley Controls within the XENUS Digital Loop Modules series. The unit serves as a two-axis motor interface that closes current and velocity loops on the module rather than in a host controller, reducing processor overhead in multi-axis machines. In industrial automation, it links servo amplifiers to feedback devices and higher-level motion networks, making it a compact building block for coordinated positioning systems. The card allows drive intelligence to be embedded directly on the backplane of PCB-based motion racks.
Each axis can deliver a continuous phase current of 3 A, allowing moderate-power servomotors to hold torque during steady-state operation. When dynamic moves are required, the onboard amplifiers rise to a peak output of 4 A, while the upstream supply must accommodate a momentary draw of 9 A. The power stage operates at up to 55 VDC, so motors rated for 24 to 48 V systems can be driven without exceeding insulation limits. The module provides two independent drive paths that share a common DC rail while maintaining separate current feedback loops. This arrangement simplifies wiring in gantry or differential steering platforms and permits both motor channels to operate from the same power source. Independent loop control also allows each connected axis to respond to its own command and feedback signals.
System integration uses low-pin-count ribbon connectors. The serial maintenance port follows the RS-232 standard for simple parameter downloads without fieldbus hardware. Feedback signals from encoders or resolvers arrive through a 14-pin header, while command, limit, and fault lines are routed through a 26-pin I/O strip that supports optically isolated logic. High-current conductors reach the board through a 6-pin power block, separating noisy motor returns from logic grounds. Two LED status indicators show drive-enable and fault states, allowing module status to be viewed from the panel door. The separate signal and power connections help prevent motor-current paths from interfering with low-level feedback and control circuits.
