Product Description:

The ELM7222-0010 is a compact servo-drive terminal engineered by Beckhoff for the ELM EtherCAT Terminals series. Mounted directly beside standard I/O slices, it embeds dual motor amplifiers and real-time control loops inside the EtherCAT network, eliminating separate panel drives. In industrial automation, the terminal regulates current, speed, and position of small brushless DC or permanent-magnet synchronous motors so axes such as pick-and-place grippers, test stands, or secondary packaging stations can be synchronized with millisecond accuracy while keeping wiring and footprint minimal.

It uses a current controller that cycles at 32 kHz, providing rapid torque correction on each of the 2 channels. Continuous motor current up to 8 A rms is available, and short bursts can reach 16 A for one second without derating. The control electronics are powered by a 24 VDC auxiliary rail, while the supply pins inside the terminal can pass 10 A to downstream modules. A dedicated brake output delivers 24 VDC at 0.5 A, allowing the terminal to control a motor holding brake. Position, speed, and PWM regulators update at 16 kHz, and the module draws only 120 mA from the EtherCAT E-bus.

The communication back-plane is separated from the power stage by 500 V of E-bus isolation, reducing the risk of ground loops in modular machines. When dynamic stopping is required, the integrated brake transistor can connect external resistors as low as 3 Ω or as high as 100 Ω, allowing the braking circuit to be matched to the application. Motors with a minimum winding inductance of 300 µH remain stable at the shared 16 kHz modulation rate, and the contact conductors are sized so adjacent terminal groups are not current-limited during simultaneous axis motion. Total internal consumption stays low, which helps thermal management in densely populated I/O rows.