Von Duprin 900-4RL 4 Relay Boa...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$721.00
$480.95
Von Duprin 900-4RL 4 Relay Board with Integrated Logic for Security Interlocks, Auto Operators and Time Delays

Von Duprin 900-4RL 4 Relay Board with Integrated Logic for Security Interlocks, Auto Operators and Time Delays

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Model: 900-4RL
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$721.00
$480.95
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Von Duprin 900-4RL 4 Relay Board with Integrated Logic for Security Interlocks, Auto Operators and Time Delays

Commercial-Grade Power Supply Board Module for Advanced Access Control Applications

The Von Duprin 900-4RL is a professional-grade 4 Relay Board featuring integrated logic designed for controlling security interlocks, auto operators, and time delays. Engineered as part of Von Duprin's Electrical Products series, this optional distribution board delivers independently controlled relay functionality with FA capability, making it an ideal solution for demanding commercial access control and door hardware systems. Rated Grade 1 for commercial applications, the 900-4RL provides reliable, precision relay switching to support complex security and automation configurations.

Professional Features & Benefits

  • 4-Relay Configuration: Features four independently controlled relays with integrated logic for versatile management of multiple security and automation functions simultaneously.
  • Integrated Logic Control: Built-in logic enables direct control of security interlocks, auto operators, and time delays without requiring additional external controllers.
  • FA Compatibility: Designed with FA (Fire Alarm) integration capability, supporting life-safety system coordination in commercial door hardware applications.
  • Optional Distribution Board: Functions as an optional distribution board, providing flexible system expansion and integration within compatible Von Duprin power supply configurations.
  • Grade 1 Commercial Rating: Rated Grade 1 for commercial use, ensuring dependable performance in high-demand institutional and commercial environments.
  • Security Interlock Support: Supports security interlock configurations, enabling coordinated control of multiple access points for enhanced facility security management.
  • Auto Operator & Time Delay Control: Provides dedicated relay outputs for controlling automatic door operators and programmable time delay functions.

Technical Specifications

  • Product Group: Power Supplies
  • Series: Electrical Products
  • Grade: Grade 1
  • Product Subgroup: Boards & Modules
  • Subcategory: Boards & Modules
  • Product Type: Boards & Modules
  • Commercial/Residential: Commercial
  • Product Category: Power Supplies
  • Department: Door Hardware

Professional Applications

  • Commercial Building Security Systems
  • Healthcare Facility Access Control
  • Educational Institution Safety Systems
  • Government and Municipal Buildings
  • Industrial Facility Monitoring and Access Control
  • Multi-Tenant Commercial Properties with Interlock Requirements
  • Automated Door Operator Integration Projects

Why Choose Von Duprin Quality?

Von Duprin power supply boards and modules are engineered to Grade 1 commercial standards, delivering the reliability and precision required for critical access control and life-safety applications. The 900-4RL's integrated logic and FA compatibility reflect Von Duprin's commitment to providing complete, coordinated solutions for complex commercial door hardware systems. Trusted by security professionals and door hardware specialists, Von Duprin electrical products are built for demanding environments where dependable performance is essential.

Product Specs

Product Group:
Power Supplies
Series:
Electrical Products
Grade:
Grade 1
Product Subgroup:
Boards & Modules
Subcategory:
Boards & Modules
Product Type:
Boards & Modules
Commercial/Residential:
Commercial
Product Category:
Power Supplies
Department:
Door Hardware

Von Duprin 900-4RL – Frequently Asked Questions

1) What is the difference between the Von Duprin 900-4RL and the 900-4RL-FA?
Both are the same 4 relay board with integrated logic. The -FA version adds fire alarm integration capability, so the relays can be coordinated with the building's life safety system (for example, releasing an interlock or an electrified device on alarm). If your specification calls for fire alarm interface on the power supply, order the 900-4RL-FA; if the FA tie-in is handled elsewhere in the panel, the plain 900-4RL covers the relay logic.
2) What does the Von Duprin 900-4RL relay board actually do in an access control system?
It gives you four independently controlled relays with logic built onto the board, so one board can run security interlocks (mantraps and vestibules where only one door may be unlocked at a time), automatic door operators, and time delay functions without adding a separate external controller. Each relay is switched independently, which is what lets one board coordinate several openings or several functions at once.
3) Is the 900-4RL a standalone controller or does it mount inside a power supply?
It is an optional distribution board, meaning it installs into a compatible Von Duprin power supply enclosure rather than working on its own. You order the power supply first, then add the 900-4RL as the relay/logic option. Budget the board as an accessory line item on the panel, not as a complete power supply.
4) I need a mantrap interlock between two doors. Is this the right board?
Yes, security interlock control is one of the three functions the 900-4RL is built for. The integrated logic handles the interlock sequencing directly, so a pair of doors can be tied together without a separate interlock panel. With four relays on the board you have enough outputs to cover the locking devices plus signaling at both openings.
5) Can the 900-4RL trigger an automatic door operator after the lock releases?
That sequencing is exactly what the board is for. It provides dedicated relay outputs for automatic door operators and for programmable time delay, so the logic can release the electrified device, hold it, and then signal the operator to swing the door in the correct order. This is the usual arrangement on an accessible entrance where an electric latch retraction device and a power operator have to work together.
6) Is the Von Duprin 900-4RL rated for commercial or institutional use?
Grade 1, and it is a commercial-only product, not a residential one. That is the rating specifiers typically call for in healthcare, education, government and multi-tenant commercial buildings, which are the environments this board is catalogued for.
7) Do I need a separate logic module or timer with the 900-4RL?
No. The logic is on the board itself, which is the point of the 4RL over a plain relay strip. Interlock sequencing, operator signaling and time delay are handled without an additional external controller, so the parts count in the enclosure stays down.
8) How many openings can one Von Duprin 900-4RL board handle?
The board carries four independently controlled relays, so the practical limit is how many relay outputs your sequence consumes. A simple single opening with a lock output and an operator signal uses two; an interlocked pair using lock plus signal at each door uses all four. Count the outputs your sequence of operation calls for and add a second board if you run past four.
How fast can I get the Von Duprin 900-4RL 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 Von Duprin 900-4RL come with a warranty?
Absolutely. The Von Duprin 900-4RL 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 Von Duprin 900-4RL?
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 Von Duprin 900-4RL 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.
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