ABB ASTO-21C Safe Torque Off Interface Board ACS800
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Sku:ASTO-21C
Country Of Origin: USA
Vendor: ABB
Type: Safety Interface Board
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Product description
Product Overview
The ABB ASTO-21C is a Safe Torque Off (STO) interface board for ACS800 drive systems. It implements dual-channel STO logic that disables torque-generating capability by inhibiting the inverter gate drive signals without disconnecting the main power, supporting safety functions such as emergency stop and prevention of unexpected start-up.
Core Specs
Type: Safe Torque Off (STO) interface board
Compatible drives: ACS800 series (R7i–R8i frames class)
Supply: 24 V DC ±10%
Current consumption: Approx. 40 mA (20 mA per channel)
Logic levels: “0” < 5 V DC, “1” > 17 V DC
Max cable length: Up to 300 m (shielded twisted pair)
Ambient temperature: 0…50 °C
Option association: ACS800 +Q967 STO
Highlights
Dual-channel STO hardware disable
Removes torque without main power disconnection
Supports emergency stop and prevention of unexpected start-up
Designed for ACS800 high-power frames
FAQ
Function? Safe Torque Off interface board.
Drives? ACS800 R7i–R8i class.
Supply? 24 V DC.
Installation Guide
Power down the ACS800 drive completely.
Install the ASTO-21C in the designated position according to the STO hardware manual.
Connect the dual-channel STO control wiring (shielded twisted pair).
Configure the STO parameters and safety logic.
Perform functional safety validation and commissioning checks.
Selection Tips
Confirm frame size compatibility (R7i–R8i class).
Required for ACS800 drives equipped with the +Q967 STO option.
Critical spare for STO-enabled ACS800 installations.
Answer 1: PLC DCS Pro Ltd. collaborates with over 50 countries worldwide. As a leading supplier in China, we can provide significant discounts to customers based on market demand.
Question 2: What Is The Warranty Period?
Answer 2: We offer a standard one-year warranty for all new and original items.
Question 3: What Payment Methods Do We Accept?
Answer 3: We accept 100% T/T (Telegraphic Transfer) before shipping. For items with a lead time, a 30% deposit is required in advance, with the remaining 70% balance due before shipping. If you have an agent in China, please contact us for RMB transfer.
Question 4: What Shipping Methods Do We Use?
Answer 4: We primarily utilize carriers such as FedEx, DHL, UPS, BRE, etc. If you have an account with any of these carriers, you can arrange the shipping yourself. Additionally, we offer free shipping to China freight forwarders.
Question 5: What Is Our Delivery Time?
Answer 5: Typically, delivery takes around 1-3 days after receiving the advance payment. For items with a quoted lead time, delivery will occur as per the specified lead time.
Question 6: How Do We Package The Goods?
Answer 6: Our packaging process involves multiple layers of protection. Initially, the product is placed in its original box, sealed with a label. Then, we add a layer of bubble wrap to safeguard against collisions during transportation. Finally, all products are securely packed in sturdy boxes for further protection.
Question 7: How Can Customers Contact Us And Request A Quote?
Answer 7: Customers can inquire via email, WhatsApp, WeChat, Skype, or any preferred communication platform. Simply reach out to us, and we'll promptly provide a quote tailored to your needs.
Warranty Conditions
At PLC DCS Pro Ltd., we are committed to ensuring the quality of our products. Our one-year warranty provides coverage for any defects in material or workmanship, excluding damages caused by deliberate misuse.
🛡️Coverage Details:
This warranty encompasses all instances of product malfunction or failure due to inherent manufacturing flaws, with the exception of intentional damage.
📝Claim Process:
To avail of warranty services, please notify us of any quality-related issues within the warranty period. We may conduct online troubleshooting and examination as needed.
🚚Shipping Assistance:
We understand the importance of prompt service. Therefore, we cover return shipping costs for warranty-related returns within the first month of supply. Within three months of supply, we cover one-way shipping costs for warranty-related returns. After three months, the customer is responsible for shipping costs both ways.
🚫Exclusions:
Unauthorized modifications, repairs, or misuse of the product.
