3AC120.60-1 B & R Automation
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The B & R Automation 3AC120.60-1 is a Powerlink module from the 8AC Powerlink Modules series. It features a bandwidth of 300 kHz and an EnDat 2.1 encoder interface with 1 encoder input and resolution up to 16384 times the encoder lines. The module operates at a supply voltage of 5 V, supports a baud rate of 625 kbaud, and uses differential, symmetrical signal type with RS485 serial protocol.
Internal Product Review
The 3AC120.60-1 Powerlink Module from B & R Automation features a 625 kbaud baud rate and a bandwidth of 300 kHz, ensuring fast and reliable data transmission. Its EnDat 2.1 encoder interface with a resolution of 16384 × encoder lines supports high-precision positioning. This module is a strong choice for automation systems requiring advanced encoder monitoring and differential signal types.
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Product Description:
The 3AC120.60-1 is a communication and encoder interface module produced by B&R Automation within the 8AC Powerlink Modules series. Installed on a POWERLINK network, the module links high-resolution feedback devices to a controller and translates differential encoder signals into deterministic bus frames for position control tasks in automated machinery. This lets one compact interface pass measured motion data from the encoder to the control system while preserving the timing needed for coordinated axis operation. It is suited to motion applications where encoder data must be transferred over the network without unpredictable update delays.
Its communication side transmits data at a baud rate of 625 kbaud, and the internal analog front end maintains a -3 dB signal bandwidth of 300 kHz, allowing sinusoidal incremental channels to pass with minimal attenuation. Differential, symmetrical signaling minimizes noise while tolerating a common-mode swing of ±7 V. One encoder input accepts sine/cosine tracks, and the pair is sampled through a 15-pin female DSUB connector. Power is supplied at 5 V, and the board draws up to 250 mA from that rail. A factory-installed line termination matches typical cable impedance, and the integrated monitoring circuit checks encoder presence so broken cables can be detected in real time. This arrangement supports stable feedback acquisition in electrically noisy cabinets and near motor power cables.
For absolute feedback, the unit supports EnDat 2.1 and can deliver a resolution of 16384 × encoder lines after internal interpolation. The link may be terminated locally with a selectable 120 Ω resistor to maintain signal integrity over longer cable runs, and continuous operation is permitted in ambient temperatures up to 55 °C. Encoder monitoring remains active during operation, so loss of position data can trigger a network fault. Serial EnDat words and incremental sine/cosine signals share the same connector, which simplifies integration when an existing machine is updated. By combining serial and analog feedback handling in one channel, the module reduces the need for separate interface hardware.
