What it is and what it does
The ABB 1SAP114300R0278 is a TB5640-2ETH terminal base for the AC500 V3 PLC family. It provides four slots for communication modules, with two Ethernet interfaces, one serial interface, and one CAN interface built onto the base itself. This means one physical unit handles the backbone network connections while leaving the four slots free for additional fieldbus or protocol modules. The base is powered by a DC supply, and the IP20 degree of protection makes it suitable for clean, enclosed control cabinet mounting where no moisture or dust ingress is expected.
Integration note
The TB5640 base mounts in the AC500 V3 rack and accepts up to four communication modules in the expansion slots. The two built-in Ethernet ports handle primary plant network connectivity; the serial and CAN interfaces serve legacy or dedicated fieldbus drops. DC input voltage must match the PLC backplane supply — verify polarity before engaging the connector.