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ABB TU551-CS31 | CS31 Bus Terminal Unit for AC500 PLC, Screw Terminals

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Certification

"ACH has proven to be a reliable partner. Their products are genuine and high-quality, with competitive prices and on-time delivery. We trust them as our long-term supplier in automation."

—— Mohammed Al-Farsi, Procurement

"For us, cost efficiency and authenticity are key. ACH helps reduce expenses while ensuring reliable quality and timely supply, making them a strong partner in our operations."

—— Procurement Manager

"For us, cost efficiency and authenticity are key. ACH helps reduce expenses while ensuring reliable quality and timely supply, making them a strong partner in our operations."

—— Supply Chain Director

"ACH offers quick response, flexible solutions, and fair pricing. The products are always genuine and reliable, and their friendly support makes cooperation smooth."

—— Operations Manager

"ACH provides genuine products with stable quality and fair pricing. Their fast response and reliable delivery give us confidence to continue working with them."

—— Engineering Manager

"We value ACH for their consistent quality and competitive pricing. Deliveries are always reliable, and their professional support makes procurement much easier for our team."

—— Procurement Head

ABB TU551-CS31 | CS31 Bus Terminal Unit for AC500 PLC, Screw Terminals

Large Image : ABB TU551-CS31 | CS31 Bus Terminal Unit for AC500 PLC, Screw Terminals Get Best Price

Product Details:

Place of Origin:	DE
Brand Name:	ABB
Certification:	ATEX
Model Number:	TU551-CS31
Document:	ACH-AB-P+F-E+H-IFM-ASCO-YOK...WA.pdf

Payment & Shipping Terms:

Minimum Order Quantity:	1
Price:	Negotiable
Packaging Details:	carton
Delivery Time:	Negotiable
Payment Terms:	T/T,XT,ALIPAY
Supply Ability:	100pcs per month

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Detailed Product Description

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Ambient Temperature:

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ABB CS31 Bus Terminal Unit

AC500 PLC screw terminals

ABB positioner bus terminal

ABB TU551-CS31 | CS31 Bus Terminal Unit for AC500 PLC, Screw Terminals

ABB TU551-CS31 terminal unit for CS31 I/O modules. 24V DC powered, DIN rail mount, screw terminals, IP20. ABB AC500 PLC system base module.

Product Overview

The ABB TU551-CS31 is a CS31 bus terminal unit (base module) designed for the ABB AC500 PLC system. It serves as the mechanical and electrical base for mounting S500 series CS31 communication interface modules and I/O modules. Featuring screw terminals for reliable wiring, it distributes the 24V DC process supply and signals, allowing for easy module replacement without disturbing the field wiring.

Technical Specifications (Electrical & Functional)

Parameter	Specification
Manufacturer / Series	ABB / AC500 (TU551 Series)
Model	TU551-CS31
Article Number	1SAP210600R0001
Product Type	CS31 Bus Terminal Unit (Base Module)
Supply Voltage (Up)	24 V DC (18 – 30 V DC range)
Terminal Type	Screw Terminals
Bus Interface	CS31 I/O Bus (for S500 modules)
Internal Circuit Supply	Via Up/ZP terminals
Degree of Protection	IP20

Technical Specifications (Mechanical & Environmental)

Parameter	Specification
Mounting	DIN Rail (TS-35/7.5 or 15)
Dimensions (WxHxD)	~ 11 x 100 x 60 mm (approx.)
Operating Temperature	0 °C to +60 °C
Storage Temperature	-40 °C to +70 °C
Ambient Conditions	For control cabinet use (IP20)
Compatible Modules	S500 CS31 Communication & I/O Modules

Key Features

Hot-Swap Capable: CS31 modules can be inserted/removed without disconnecting field wires.
Integrated Power Distribution: Terminals 1.8–4.8 (Up) and 1.9–4.9 (ZP) provide continuous 24V DC to modules.
System Integration: Part of the scalable ABB AC500 PLC architecture.
Secure Connection: Modules lock mechanically into the terminal unit.

Applications

Factory automation control cabinets
Distributed I/O expansion for AC500 PLCs
Machine control systems requiring modular I/O

ABB TU551-CS31 | CS31 Bus Terminal Unit for AC500 PLC, Screw Terminals 0

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About ACH

Founded in 2012, ACH is a top-tier distributor of industrial automation products, supplying genuine devices from leading brands like ABB, P+F, E&H, AB, MTL to emerging markets worldwide. Our mission is to provide 100% Genuine products at the most competitive prices, helping customers reduce costs and strengthen their market position.

Frequently Ask & Questions

Are preferential prices available?

Long-term brand partners can get competitive product prices. At the same time, ACH controls the profit per order to 5%, providing the most competitive prices.

Are the Products Genuine OEM Units?

Yes, all products from ACH are certified genuine OEM units. We acquire our inventory through official OEM channels and trusted third-party suppliers, ensuring every item is authentic and reliable.

How will you arrange shipment?

We'll handle the shipping for you. Through our partnerships, we can secure competitive rates with major carriers like FedEx, DHL, TNT, and UPS, ensuring a smooth and cost-effective delivery.

What is the warranty of goods?

One-year Warranty.

How long is the logistics cycle of the product?

Products are divided into spot and futures, and the delivery period of different brands of products is also different. For details, please contact the ACH business manager.

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