Product Description:

The 8BAC0124.000-1 is a field-signal conditioning module produced by B & R Automation for the 8BA ACOPOS Modules series. Mounted beside an ACOPOS drive, it channels encoder and limit information from machines into the motion controller, translating differential sensor levels into logic signals suitable for high-speed position control. By performing this adaptation close to the motor, the unit supports precise speed and position loops, reduces wiring noise, and adds galvanic isolation between moving equipment and the internal backplane.

The module provides 1 encoder channel, which is adequate for single-axis stations. Its 2 limit inputs accept mechanical overtravel switches that halt motion when triggered. The board regenerates the encoder supply at 5 V ±5%, keeping transducer electronics within TTL limits despite cable losses. Internal position sampling uses a 12-bit converter, yielding 4096 discrete values for each period. To preserve edge fidelity, the signal path holds full amplitude up to the -3 dB corner at 300 kHz, so high-line-count encoders remain readable even at elevated shaft speeds.

Beyond the -3 dB point, bandwidth continues until the -5 dB roll-off at 400 kHz, allowing square-wave symmetry for most industrial commutation tasks. The differential drivers tolerate a common-mode window of ±7 V, preventing false counts when reference potentials shift along long drag chains. Input impedance is fixed at 1470 Ω, a value that balances line loading against electromagnetic immunity, while a built-in 120 Ω terminating resistor can be enabled to suppress reflections on shielded twisted pairs. Two sense lines and a sense compensation of 2 × 0.7 V let the module adjust its supply for cable losses. A switching delay of 100 µs limits propagation time from a sensor edge to the backplane flag, ensuring deterministic reaction in tightly synchronized drive networks.