Siemens
Siemens 2021651-002 Interface Relay - 24V DC, 2 CO Contacts
Siemens 2021651-002 Interface Relay
● In Stock
12-Mo Warranty
Same-Day Dispatch
Ships Worldwide
🎖 Veteran-Owned
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Response within 1 business hour
12-month warranty
All units tested
Same-day dispatch
Order by 2pm CST
Worldwide delivery
US, EU, Asia, Middle East
Veteran-owned
CAGE: 9NK75
Signal isolation
High switching frequency
Compact size
Low power consumption
Robust terminals
Product description
The Siemens 2021651-002 is an interface relay designed for signal isolation and control in automation systems. It features a 24V DC coil and provides 2 changeover (CO) contacts.
This relay is commonly employed in applications requiring signal amplification or galvanic isolation, such as in process control, building automation, and data acquisition systems. Its compact design and reliability are key advantages.
As a veteran-owned surplus parts distributor, Stanlo Automation is your trusted source for the Siemens 2021651-002. We ensure quality and prompt delivery of essential automation components.
Technical specifications
| Coil Voltage | 24V DC |
| Contacts | 2 CO |
| Type | Interface Relay |
| Mounting | DIN Rail |
Common applications
PLC interfacing
Signal conditioning
Automation control
Alarm systems
Data acquisition
Compatible systems
Compatible with Siemens PLCs and other control systems requiring signal isolation.
Also known as
Siemens 3TX7 series relay
Siemens 2 CO relay
Siemens 24V DC interface relay
Replaces / compatible with
This interface relay is suitable for replacing older Siemens models or for use in new systems requiring reliable signal interfacing.
Technical note
Expert tip
Ensure the current rating of the contacts is not exceeded to maintain operational integrity.What happens next?
1
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Immediate receipt acknowledgment sent to you
2
Account manager assigned
Confirms your part's spec and condition
3
Your quote delivered
Tailored to your specific requirements
Frequently asked questions
What type of contacts does the Siemens 2021651-002 interface relay have?
The Siemens 2021651-002 interface relay features 2 changeover (CO) contacts. It is controlled by a 24V DC coil and is designed for signal isolation and control tasks.