8AC122.60-2 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 8AC122.60-2 module is part of the 8AC Powerlink Modules series and features a 9-pin DSUB socket connector with a 2-pole design. It supports encoder monitoring, has a BRX resolver type, and operates with a reference output frequency of 10 kHz. The module's input impedance at 10 kHz is 10.4 kΩ minus j11.1 kΩ per pin, and it consumes up to 1.2 watts of power.
Internal Product Review
The 8AC122.60-2 is a B & R Automation resolver module designed for BRX resolver feedback at 10 kHz. Encoder monitoring and precision to ±8 angular minutes support dependable motion feedback in closed-loop applications. With power consumption of just 1.2 W max, this module is an efficient choice for accurate resolver interfacing.
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Product Description:
The 8AC122.60-2 is a resolver interface module produced by B&R Automation for its 8AC Powerlink Modules series. Installed on the real-time Powerlink network, the unit conditions resolver feedback so controllers can track absolute rotor position and speed within distributed motion systems. By combining analog resolver excitation with differential reference outputs, the module provides a data bridge between BRX transducers and the digital drive layer used in industrial automation cells.
Its signal chain begins with an input channel tuned to 10 kHz. Each pin presents an impedance of 10.4 kΩ − j11.1 kΩ, a complex value that minimizes loading while preserving phase information at that frequency. The design tolerates up to ± 20 V of common-mode potential, allowing reliable operation beside motors and inverters that introduce ground shifts. A low-profile 9-pin D-Sub socket simplifies shielded cable termination. Internal regulation keeps consumption to 1.2 W, which helps limit thermal rise in dense cabinets. For excitation, the module can deliver up to 50 mAeff of differential reference current, and the voltage swing is typically 3.4 Veff so resolvers receive a clean sine waveform for accurate coupling.
Encoder supervision is active, so the control system receives fault flags if resolver cabling opens or shorts. The sensor interface follows the BRX resolver standard, which uses a 2-pole rotor to provide one electrical cycle per mechanical revolution. Signal integrity is characterized by a nominal voltage ratio of 0.5 ± 5 % between the secondary and primary windings, which keeps amplitude within the converter’s linear range. Angular deviation is held within ± 10 angular minutes, and dynamic tracking adds no more than ± 3° of phase shift to support precise commutation at high speeds. The reference output leaves the module as differential signals, while overall precision is limited to ±8 angular minutes, giving drives a clear margin for closed-loop alignment.
