27BA015FXT12
The 27BA015FXT12 from Sanyo Denki supports motion, robot, and sequence control and offers a 100 Mbps EtherCAT interface and 16 digital inputs at 24 VDC. Part of the BL Super Servo Amplifiers series, it uses passive cooling and measures 55x120x110 mm.
It has a 2-16 ms communication cycle and a 24 VDC main power supply at 0.8 A. Weighing only 300 g, it uses 19.2 W of power efficiently.