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NSi Industries Rolling Ball Push-to-Open Door-Window Contact, 12-24VAC/DC
The NSi Industries Rolling Ball Push-to-Open Door-Window Contact is a rolling ball type contact designed for reliable door and window sensing in low-voltage security and alarm circuits. Operating at 12-24VAC/DC, this contact uses a push-to-open rolling ball mechanism to signal a change of state whenever a monitored door or window is opened, making it a straightforward addition to access-control and alarm-monitoring wiring. Built by NSi Industries for electrical and security professionals, this Door-Window Contact is engineered for dependable, repeatable actuation in everyday commercial and residential installations.
Key Features
- Push-to-Open Operation: The rolling ball type mechanism actuates on a push-to-open basis, delivering consistent, repeatable contact closure with each cycle.
- Door-Window Contact Application: Purpose-built as a Door-Window Contact for monitoring the open/closed status of doors and windows in security and alarm systems.
- Rolling Ball Type Design: Uses a rolling ball type contact mechanism rather than a standard magnetic reed, suited to applications where a mechanical push-actuated contact is preferred.
- Voltage Compatibility: Rated for 12-24VAC/DC operation, aligning with common low-voltage alarm panel and access-control circuit requirements.
- NSi Industries Build Quality: Manufactured by NSi Industries, a recognized supplier of electrical and security-circuit components for professional installers.
Technical Specifications
- Brand Name: NSi
- Application: Door-Window Contact
- Type: Door-Window Contacts Rolling Ball Type
- Operating Voltage: 12-24VAC/DC
Typical Applications
- Security and Burglar Alarm Systems
- Door and Window Open/Closed Monitoring
- Commercial Access-Control Wiring
- Residential Alarm Panel Circuits
- Low-Voltage Security Retrofits and New Installations
Why NSi Industries?
NSi Industries supplies the Rolling Ball Push-to-Open Door-Window Contact as a dependable, purpose-built component for 12-24VAC/DC security and alarm circuits. Its rolling ball type push-to-open design gives installers a straightforward way to add door and window monitoring to new or existing low-voltage systems. Choose NSi Industries for consistent, code-compliant performance in professional electrical and security work.
Manufacturer Resources
Spec Sheet
Product Specs
- Brand Name:
- NSi
- Application:
- Door-Window Contact
- Product Type:
- Door-Window Contacts Rolling Ball Type
- Department:
- Electrical
- Product Group:
- Wiring Devices
- Product Subgroup:
- Lighting Controls & Sensors
NSi TA44 – Frequently Asked Questions
1) Will the NSi TA44 door contact work on a 12V alarm panel loop?
Yes. The NSi Industries TA44 rolling ball contact is rated for 12-24VAC/DC, so it drops straight onto the low-voltage loops most alarm panels and access-control circuits run. Either AC or DC in that band is fine.
2) What is the difference between a rolling ball contact and a standard magnetic reed door contact?
The NSi TA44 is a mechanical push-actuated contact: a rolling ball is held depressed by the closed door or window and releases when the door swings away, so it is a push-to-open device. A magnetic reed switch instead senses a magnet on the moving leaf with no physical contact. Pick the rolling ball type when you want a mechanical actuation in the jamb or frame rather than a magnet-and-switch pair, and the reed type when the two halves cannot touch or the gap varies.
3) Is the TA44 contact normally closed or does it open when the door opens?
Push-to-open is how the TA44 behaves. With the door shut, the leaf holds the ball in and the contact stays in its closed-door state; open the door, the ball releases and the contact opens, signalling the change of state to the panel. Wire it into the zone loop accordingly.
4) Can the NSi TA44 be used on windows as well as doors?
It is built as a door-window contact, so monitoring the open/closed state of a window sash is a listed use alongside doors. The requirement is the same either way: the closing leaf has to physically depress the ball when shut.
5) Can I add the NSi TA44 to an existing alarm system, or is it only for new installs?
Both. The TA44 is intended for low-voltage security retrofits as well as new installations, so it can be added to an existing 12-24VAC/DC panel zone without changing the panel, provided the mounting location lets the door or window physically press the ball when closed.
6) Do I need to order a separate magnet with the NSi rolling ball contact?
No magnet is involved. The TA44 actuates mechanically off the door or window leaf pressing the ball, so unlike a reed set there is no second half to mount on the moving leaf and nothing to align.
7) Where can I get the manufacturer spec sheet for the NSi TA44 contact?
NSi Industries publishes a PDF spec sheet for the TA44, and it is the place to confirm mounting dimensions and contact ratings before you cut the jamb: https://media.distributordatasolutions.com/nsi/2020q1/6e21c394baa870303f9737babd482e3705a3bdab.pdf
How fast can I get the NSi TA44 delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the NSi TA44 come with a warranty?
Absolutely. The NSi TA44 is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the NSi TA44?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the NSi TA44 from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.