



The TB521-ETH AC500 Terminal Base is a foundational component for building high-performance distributed automation systems with the ABB AC500 V2 platform. Designed to host a controller and provide dedicated slots for communication modules, this terminal base integrates an Ethernet interface alongside two serial ports (RS232/RS485), making it an essential hub for connecting field devices, drives, and higher-level networks. Its rugged construction and IP20 rating ensure reliable operation in demanding industrial environments, while its compact footprint simplifies panel layout and wiring. Whether used as a standalone base or as part of a pre-configured controller kit, the TB521-ETH delivers the flexibility and performance required for modern automation tasks.
| Specification | Details |
|---|---|
| Product Type | Terminal Base for AC500 V2 |
| Model | TB521-ETH |
| Function | 2 slots for communication modules; Ethernet interface; 2 serial interfaces RS232/RS485 |
| Communication Interfaces | D-SUB (RS232/RS485), RJ45 (Ethernet), Terminals |
| Input Voltage Type | DC |
| Supply Voltage | 24 V DC |
| Degree of Protection | IP20 |
| Ambient Air Temperature (Operation) | 0 °C ... +60 °C |
| Ambient Air Temperature (Storage) | -40 °C ... +70 °C |
| Product Net Weight | 0.186 kg |
| Product Net Depth / Length | 28 mm |
| Product Net Height | 135 mm |
| Product Net Width | 123.5 mm |
| Gross Weight (Packed) | 0.245 kg |
| Package Level 1 Dimensions (L x W x H) | 147 mm x 131 mm x 40 mm |
| Package Level 1 Units | 1 carton |
| Minimum Order Quantity | 1 piece |
| Order Multiple | 1 piece |
| Selling Unit of Measure | piece |
| Made To Order | No |
| eClass | 27-24-22-92 |
| ETIM 8 | EC000810 - PLC mounting rack |
| UNSPSC | 32151703 |
| WEEE Category | 5. Small Equipment (No External Dimension More Than 50 cm) |
| SCIP Number | 5cc74e83-4e52-47b0-abb9-88510df47788 Germany (DE) |

What Does Our Clients Say
Mitsubishi MR-J4
Laura Navas
Great product!
2019/12/01
Keyence sensor
EQDR SALES
Original and fast!
2020/02/22