Product Details
Configured for signal routing, modular processor mounting, and bus connection management in AC500 V2 PLC platforms, the ABB TB521-ETH 1SAP112100R0270 (TB521-ETH Terminal Base) provides direct physical/electrical execution. It accommodates one CPU module along with two expansion slots dedicated to communication modules. The base unit integrates an Ethernet RJ45 interface, two RS232/RS485 serial communication ports, and removable terminal blocks powered via a 24 VDC process supply.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | TB521-ETH 1SAP112100R0270 |
| Brand | ABB |
| Origin | Germany |
| Weight | 0.186 kg (0.410 lbs) net / 0.245 kg gross |
| Dimensions | 123.5 mm x 135 mm x 28 mm (4.86 in x 5.31 in x 1.10 in) |
| Operating Temp | 0 to +60 deg C (Storage: -40 to +70 deg C) |
| Power Consumption | 24 VDC supply voltage |
| Expansion Slots | 2 slots for communication modules |
| Interfaces | 1x Ethernet RJ45, 2x RS232/RS485 serial, D-SUB / terminal connectors |
| System Compatibility | ABB AC500 V2 processors |
| Degree of Protection | IP20 |
Backplane Bus Communication Velocity and Network Latency Limits
The TB521-ETH terminal base establishes high-velocity backplane bus communication routes between the mounted AC500 CPU and communication expansion modules. Dedicated physical trace routing on the internal printed circuit board prevents cross-talk and preserves deterministic execution speeds across the backplane bus. High signal integrity over the embedded trace pathways ensures low-latency data transfers across the Ethernet network interface and serial communication channels.
Frequently Asked Questions
Q: Does the TB521-ETH support hot-swapping of communication modules attached to the slots?
A: No. Power to the 24 VDC process supply must be isolated prior to inserting or removing communication modules or the CPU processor to prevent backplane communication errors and hardware damage.
Q: What physical connectors are provided on the terminal base for serial communications?
A: The terminal base incorporates serial interfaces supporting RS232 or RS485 communication lines via D-SUB and screw-type terminal blocks.
Field Installation Guidelines
- Snap the TB521-ETH terminal base onto a standard 35 mm DIN rail, verifying that the metal grounding spring makes direct mechanical contact with the unpainted rail surface.
- Confirm that the 24 VDC system power supply is turned off before connecting power wiring to the terminal base power terminals.
- Align the AC500 processor or communication modules with the guide slots on the terminal base and press firmly until the locking mechanism fully clicks into position.
- Keep serial (RS232/RS485) and Ethernet signal cables at least 200 mm away from high-voltage AC lines and switching inductive loads.
- Connect all cable shielding for serial and Ethernet lines to the functional earth terminal near the panel entry point to eliminate electrical interference.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
Tech & Buying Guide
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