8AC125.60-1 B & R Automation
Wake Industrial LLC is not an authorized distributor of this product.
The B & R Automation 8AC125.60-1 is part of the 8AC Powerlink Modules series and features a BiSS/SSI SinCos/SSI interface. It supports one encoder input with a supply voltage of 5 V at 250 mA and has a maximum signal frequency of 300 kHz. The module connects using a 15-pin female DSUB connector and operates at temperatures up to 55°C.
Internal Product Review
The 8AC125.60-1 is a B & R Automation Powerlink module with a BiSS/SSI SinCos/SSI interface and synchronous RS485 transmission. Differential symmetrical signaling and a 300 kHz maximum signal frequency support precise encoder feedback in motion applications. A resolution of 16384 × encoder lines makes this module a strong choice for high-accuracy integration.
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Product Description:
The 8AC125.60-1 module is an encoder interface board produced by B&R Automation for the 8AC Powerlink Modules series. Mounted in a Powerlink controller rack, the board acquires position data from incremental or absolute encoders and passes that information to the real-time network for deterministic motion control in automated production cells. It converts differential encoder signals into synchronized serial data for downstream drive modules. This role makes it suitable for axis applications that depend on accurate feedback exchange between the sensor, controller, and networked motion hardware.
The unit provides 1 dedicated encoder input that works with BiSS, SSI, or SinCos formats. Connected transducers are powered by a regulated 5 V source that can supply up to 250 mA, eliminating the need for a separate encoder supply in many installations. Captured position values reach a resolution of 16384 × encoder lines, which supports fine interpolation at the controller level. Differential, symmetrical signaling and synchronous serial transmission help reject noise, while a 15-pin female D-Sub connector and UP/DN status LEDs simplify field wiring. The analog front end sustains bandwidth up to 300 kHz at -3 dB, so high-speed axes remain trackable without aliasing.
The board can be inserted in slots 2, 3, or 4 of a System 2003 rack and draws a maximum of 4.5 W, which is useful when sizing the backplane power supply. Communication with the host controller uses an integrated RS485 backbone, and a selectable 120 Ω terminating resistor helps keep line impedance matched for long differential runs. Stable performance is maintained up to 55 °C, allowing cabinet operation without active cooling in many installations. The combination of rack-based integration, differential signaling, and direct encoder interfacing helps preserve consistent feedback in electrically noisy environments.
