Product Details
Configured for field I/O bus interface mounting and signal routing in S500 I/O platforms, the ABB TU551-CS31 1SAP210600R0001 (TU551-CS31 Interface Terminal Units) provides direct physical/electrical execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | TU551-CS31 |
| Part Number | 1SAP210600R0001 |
| Brand | ABB |
| Product Type | Interface Terminal Units |
| Origin | Germany |
| Weight | 0.236 kg |
| Dimensions | 67.5 x 135 x 28 mm |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | 24 VDC supply voltage |
| Terminal Type | Screw terminals |
| Fieldbus Protocol | CS31 protocol |
| Ingress Protection | IP20 |
Backplane Bus Communication Velocity and Network Determinism
The interface terminal unit links remote S500 I/O modules directly to the CS31 fieldbus network, maintaining steady backplane bus communication velocity across adjacent terminal slots. Integrated signal paths preserve transmission speed and firmware flash compatibility between connected bus modules and the primary controller. Screw terminal blocks maintain secure galvanic contact, minimizing contact resistance and preventing cross-talk across high-density I/O distributions.
Frequently Asked Questions
Q: Does the TU551-CS31 unit contain active processor components?
A: No, the TU551-CS31 functions as a passive mounting and wiring base that routes power, field signals, and bus communication to the plugged-in S500 I/O interface module.
Q: How is physical chassis earth grounding completed for the terminal base?
A: Frame grounding is established automatically through the integrated metallic rear grounding contact clips when snapped onto a grounded DIN rail.
Q: Can terminal wiring be modified while the system is powered?
A: Field supply voltage must be turned off prior to attaching or disconnecting field wires on the screw terminals to avoid electrical shorts.
Field Installation Guidelines
- Turn off primary 24 VDC power sources prior to mounting or wiring the TU551-CS31 unit.
- Snap the 67.5 x 135 x 28 mm terminal base onto a standard 35 mm DIN rail until the locking spring engages.
- Verify mechanical continuity between the rear metal grounding clips and the grounded DIN rail.
- Strip field wiring ends to specified lengths and secure them tightly into the screw terminal blocks.
- Maintain a minimum clearance of 200 mm between CS31 fieldbus cabling and high-voltage AC conductors to reduce electrical noise.
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
The Shift to Flexible IO Modules in Modern Industrial Automation
Traditional control systems rely on dedicated Input Output (IO) cards for industrial automation. Each conventional module processes a single signal type, such as Digital Input (DI), Digital Output (DO), Analog Input (AI), or Analog Output (AO). A standard 16-channel card accepts only one specific channel type across all ports. This inflexible hardware design often creates severe engineering bottlenecks during project execution. Engineers frequently must install entirely new cards to accommodate a single extra sensor. Consequently, late design changes increase control cabinet space requirements and drive up project costs.
DCS Commissioning Steps in Industrial Automation Projects
Commissioning a Distributed Control System (DCS) represents a crucial milestone when deploying modern process automation infrastructure. Field engineers must execute systematic verification steps to transition complex control hardware from static installation to dynamic plant control. Proper commissioning ensures that controllers, I/O modules, network switches, and HMI software operate in strict compliance with engineering design specifications before introducing live process fluids.
PLC and DCS Control System Spares Strategy: Engineering Guidelines
Modern factory automation relies on high-speed fiber optic backbones to link distributed control systems across noise-intensive industrial environments. Unlike copper wiring, optical fibers transmit data via light pulses, making them completely immune to electromagnetic interference (EMI). Field engineers must master optical cable joining and fusion splicing techniques to guarantee low-loss data transmission across critical Programmable Logic Controller (PLC) and Distributed Control System (DCS) nodes.