ABB 1SAP112100R0170 is a CPU terminal base unit with model TB521-ETH B1 for the AC500 V2 PLC series. It provides mechanical mounting, power distribution and communication expansion for AC500 V2 CPU modules. Equipped with an Ethernet RJ45 port and two configurable serial ports, it includes two communication expansion slots, designed for industrial automation systems requiring Ethernet-based networking and multi-protocol communication.

1SAP112100R0170 is the full part number. TB521-ETH B1 is the standard product model. It belongs to the ABB AC500 V2 PLC product line. The suffix R0170 denotes the hardware revision. This terminal base is specifically engineered to pair with AC500 V2 CPU modules supporting Ethernet communication.

The unit operates on 24 V DC power supply with ±10% tolerance and a maximum working current of 0.4 A. It uses tool-free spring terminals for wiring. The operating temperature ranges from 0°C to 60°C, and the storage temperature ranges from -40°C to 70°C. Relative humidity is 5% to 95% non-condensing. The protection class is IP20. The product complies with CE, UL and RoHS certifications.

It features one Ethernet RJ45 interface for TCP/IP communication. Two serial ports are configurable for RS232 or RS485. There is one dedicated CPU mounting slot and two independent slots for communication module expansion. All communication parameters and port modes can be set via supporting configuration software. Onboard LED indicators display power and communication channel status in real time.

It offers stable mechanical installation for compatible AC500 V2 CPU modules. The Ethernet interface enables high-speed data exchange between networked automation devices. The serial ports connect with external devices and support common serial protocols. Dual expansion slots allow installation of various fieldbus modules to extend system communication capacity. It supports hot swap of CPU modules with the base powered on, and provides real-time monitoring of internal circuits and communication links.

It is widely used in factory automation for assembly lines, material handling systems and packaging machinery. It applies to distributed control systems in water treatment, chemical and pharmaceutical industries. It is suitable for numerical control equipment and legacy machine upgrades requiring Ethernet connectivity, as well as modern automation retrofitting projects.

Mount the unit on a standard DIN rail and connect 24 V DC power supply correctly. Insert the compatible CPU module into the dedicated slot and connect Ethernet and serial cables. Configure communication addresses and parameters via supporting software before operation. Keep terminals clean and securely connected, avoiding excessive force during wiring. Operate within specified temperature and humidity ranges. Perform quarterly routine inspections and annual comprehensive function tests. Always disconnect power before disassembly or module replacement.