SINAMICS V20 RS485 bus interface Content 50 units Size: 34x137x6 (WxHxD) Terminating resistor SINAMICS RS485 terminating resistor for SINAMICS V20. An RS485 terminating resistor is used to terminate the bus for RS485 communications between a SINAMICS V20 and a SIEMENS controller. It can be ordered in packages of 50. SINAMICS – simply my drive!