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3 months ago
3TX7004-2MB02
Siemens 3TX7004-2MB02 available at EU Automation. Get in touch today for a quick price.
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Full 12-month warranty
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What happens next?
1. Email confirmation
You will get an email confirming that we have received your enquiry.
2. Dedicated Account Manager
One of our team will be in touch to confirm your part(s) specification and condition.
3. Your quote
You will receive a comprehensive quote tailored to your specific needs.
The Siemens 3TX7004-2MB02 is a slimline input interface relay designed to provide reliable electrical isolation and signal coupling within industrial control systems. Its double-deck construction and narrow 6.2 mm width help conserve valuable control-panel space, while screw terminals provide secure, straightforward wiring. Operating at 24 V AC/DC, the unit features one normally open, hard-gold-plated contact for dependable switching of low-level signals. The auxiliary contact is rated at 0.1 A for DC-13 applications at 230 V. This model is discontinued, with Siemens 3RQ3038-1AB01 identified as its preferred successor.
| Specification | Description |
|---|---|
| Manufacturer | Siemens |
| Part Number | 3TX7004-2MB02 |
| Alternative Part Number | 3TX70042MB02 |
| Product Type | Input interface relay coupler |
| Construction | Double-deck design |
| Contact Configuration | 1 normally open contact |
| Contact Material | Hard-gold-plated |
| Rated Control Voltage | 24 V AC/DC |
| Connection Type | Screw terminals |
| Module Width | 6.2 mm |
| Auxiliary Contact Utilisation Category | DC-13 |
| Auxiliary Contact Operating Current | 0.1 A at 230 V DC |
| Preferred Successor | Siemens 3RQ3038-1AB01 |
| Description | A compact Siemens input interface relay coupler designed to provide reliable switching and electrical interfacing within industrial control circuits. Its slim double-deck construction, hard-gold-plated normally open contact and screw-terminal connections make it suitable for space-conscious control-panel installations. |
What type of component is this?
It is an input coupling relay designed to provide electrical switching and isolation between a 24 V AC/DC control signal and an auxiliary circuit.
What is the rated control voltage?
The relay coupler is designed for a 24 V AC/DC control voltage, allowing it to be used with either alternating-current or direct-current control circuits.
How many switching contacts does it have?
The device has one normally open contact, also described as a 1 NO or 1 make contact configuration.
What is the purpose of the hard-gold-plated contact?
The hard-gold-plated contact helps provide reliable switching of low-level electrical signals by reducing the effects of contact oxidation and high contact resistance.
What connection method does it use?
The 3TX7004-2MB02 uses screw terminals for connecting the control and switched conductors.
How wide is the relay coupler?
It has a narrow mounting width of 6.2 mm, making it suitable for control panels where efficient use of installation space is important.
What does the double-deck construction mean?
The double-deck design arranges connection points across two levels, helping the component maintain a compact 6.2 mm profile.
What is the auxiliary contact rating under DC-13 conditions?
The specified operating current for the auxiliary contact is 0.1 A at 230 V under the DC-13 utilisation category.
Where is this type of relay coupler commonly used?
It is commonly used in industrial control cabinets, machine control systems and automation circuits to interface low-power control signals with auxiliary switching circuits.
Can it switch both AC and DC loads?
Its relay contact can be used in suitable AC or DC switching circuits, provided the applied voltage, current and utilisation category remain within the relevant electrical ratings.
What is the recommended successor model?
Siemens identifies 3RQ3038-1AB01 as the preferred successor to 3TX7004-2MB02.
Is the successor necessarily a direct drop-in replacement?
The successor has been identified for the same general function, but its dimensions, terminal arrangement, electrical ratings and circuit requirements should be compared with the existing installation before substitution.
Why is this component useful in a control circuit?
It allows a control signal to operate a separate relay contact, helping to separate circuit sections and provide a clear interface between control equipment and an auxiliary load.
What should be checked before installing a replacement?
Check the 24 V AC/DC control voltage, one normally open contact arrangement, contact load, 6.2 mm mounting width, screw-terminal configuration and panel wiring layout.
- Electrical isolation between control circuits and field devices
- Interfacing sensors with PLC and automation inputs
- Switching low-level control signals in industrial machinery
- Coupling 24 V AC/DC signals within control panels
- Protecting sensitive control electronics from electrical interference
- Signal conversion in process and factory automation systems
- DIN rail installations where narrow 6.2 mm components conserve panel space
- Reliable switching of low-current signals using hard-gold-plated contacts
- Control cabinet installations using screw-terminal connections
- Retrofitting industrial systems that already use Siemens 3TX relay couplers
This content has been produced using multiple sources. EU Automation takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
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Customer reviews
steve
Daniel
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Alex Bailey is my main point of contact at EU Automation...he is extremely friendly, has exceptional customer service skills and always offers great pricing & lead times.
4 months ago
Jerry Schrink
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Tom Higgins provided great prompt service. I contacted Tom by phone and within 10 minutes there was a quote in my in box. WOW Thank you Tom and Thank you EU Automation!
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Excellent service and communication from Alex Bailey. He truly goes above and beyond to ensure his clients are 100% satisfied. The entire process was seamless, and his attention to detail made a huge difference. Highly recommended for anyone looking for amazing service!
5 months ago
Gary
Tom Higgins did a great job at getting…
Tom Higgins did a great job at getting us the part we needed. He saw a concern with the part a verified before shipping.
5 months ago
Lessle Smith
Thomas Higgins has gone above and…
Thomas Higgins has gone above and beyond to make things happen for my facility. His customer service and knowledge were an asset in helping me with my order and the logistics challenges!
6 months ago
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