8BAC0121.000-1 B & R Automation
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The B & R Automation 8BAC0121.000-1 is part of the 8BA ACOPOS Modules series and includes one encoder input with HIPERFACE interface, supporting encoder monitoring. The module provides a data transfer rate of 9600 bit/s via a 15-pin male DSUB serial RS485 connection and offers 12-bit resolution. It operates at a maximum signal frequency of 200 kHz and supports a supply voltage of 10 V.
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Product Description:
The 8BAC0121.000-1 belongs to the 8BA ACOPOS Modules series from B & R Automation. It is an add-on card that links a single encoder channel and a serial communication line to an ACOPOS drive, allowing precise position feedback and low-speed diagnostics inside distributed motion-control cabinets. By converting differential encoder signals and forwarding them on an internal bus, the module helps coordinate servo axes in automated packaging, printing, and material-handling equipment.
On the communication side, the card operates at a data throughput of 9600 bit/s when the built-in RS485 port is enabled. This half-duplex interface carries drive parameter data over shielded twisted pairs and supports both differential and asymmetrical transmission styles for noise suppression on factory floors. Position words from the encoder are digitized with 12-bit resolution, which sets the step size that the controller can interpret for each revolution. High-speed edge detection is possible because the signal front end accepts frequencies up to 200 kHz, matching the needs of fast-running rotary or linear feedback devices. Connection to the drive rack is made through a 15-pin male D-sub header, and the line can be left unterminated until the integrated jumper activates its internal resistor.
The feedback channel is limited to 1 encoder input that complies with the HIPERFACE protocol. Although the encoder lines are not galvanically isolated, the circuitry can tolerate a common-mode offset of ±7 V without data errors. The logic supply for the sensing stage is 10 V, provided by the host drive via the backplane. Protective components make the input short-circuit-proof, and a watchdog monitors signal presence to trigger a fault if tracks stall or disconnect. For proper line impedance, a selectable 120 Ω terminating resistor can be engaged, stabilizing reflections on long cable runs.
Frequently Asked Questions about 8BAC0121.000-1:
Q: What type of encoder interface is available on the 8BAC0121.000-1 module?
A: The 8BAC0121.000-1 module supports HIPERFACE encoder interfaces.
Q: What serial interface does the 8BAC0121.000-1 support?
A: This module communicates via a serial RS485 interface.
Q: How many encoder inputs are provided on the 8BAC0121.000-1?
A: There is one encoder input available on the 8BAC0121.000-1 module.
Q: What is the maximum signal frequency supported by the 8BAC0121.000-1 module?
A: The maximum signal frequency supported by this module is 200 kHz.
Q: What is the data transfer rate for the 8BAC0121.000-1 module?
A: Data is transferred at a rate of 9600 bit/s with the 8BAC0121.000-1.
