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Alarm Controls PDFT Fire Relay Module
Product Features
- Non Latching or Latching mode
- 12 or 24 VDC operation
- Reverse polarity protected
- Normally ON & Normally OFF output
- Output LED’s indicate condition
- Form C contact indicates trigger status
- UL Listed sub assembly for access control and burglar alarm system
- Input Voltage : 12/24 Dual Voltage
- Outputs : 1A or 2A outputs
- Board Depth (in) : 0-203/250"
- Board Height (in) : 3.75"
- Board Width (in) : 2.25"
- Mounting Height (in) : 3.44"
- Mounting Width (in) : 1-7/8"
- Shipping Weight (lbs) : 75
Manufacturer Resources
Alarm Controls PD4C Catalog Page
Product Specs
- Series:
- PDFT
- Subcategory:
- Parts and Accessories
- Commercial/Residential:
- Commercial
- Product Type:
- Fire Relay Module
- Product Group:
- Electronic Access Controls
- Product Subgroup:
- Power Transfer Devices
- Product Voltage:
- 12/24 VDC
- Product Category:
- Electronic Access Controls
- Department:
- Door Hardware
Alarm Controls PDFT – Frequently Asked Questions
1) Will the Alarm Controls PDFT fire relay module work on a 12V access control system, or do I need the 24V version?
One part covers both. The PDFT is a dual voltage board that runs on either 12 or 24 VDC, so the same module drops into a 12V mag lock power supply or a 24V one without ordering a different model. It's also reverse polarity protected, which saves the board if the input leads get landed backwards during trim-out.
2) Does the PDFT fire relay latch on a fire alarm trip, or does it reset by itself?
Both behaviors are on the board. The Alarm Controls PDFT can be set for non-latching mode, where the output restores as soon as the fire alarm trigger clears, or latching mode, where it holds the released condition until it is manually reset. Pick latching where the AHJ wants the doors to stay released after an alarm event, non-latching where the system should self-restore.
3) Can one fire relay module release mag locks and also signal the access control panel at the same time?
Yes. The PDFT gives you a normally ON and a normally OFF output, so you can drop power to a mag lock or electric strike circuit while simultaneously energizing something else on the alarm. It also carries a Form C (SPDT) dry contact that reports trigger status back to an access panel or alarm input, and the onboard LEDs show output condition so you can verify the state at the board instead of metering it.
4) Will the PDFT board fit inside my existing access control power supply enclosure?
The board itself is 3.75 inches high by 2.25 inches wide, and the mounting hole pattern is 3.44 by 1-7/8 inches. Measure the free standoff area in your enclosure against those numbers, since the module is a sub assembly meant to mount inside a power supply or control cabinet rather than in its own housing.
5) How much current can the PDFT fire relay module switch for a mag lock circuit?
Outputs are rated 1A or 2A. That covers typical single mag lock or strike loads, but total the holding current of every lock on the circuit before you commit, and use a separate relay or a contactor if the door group exceeds the output rating.
6) Is the Alarm Controls PDFT UL Listed for use in an access control installation?
It is a UL Listed sub assembly for access control and burglar alarm systems. That listing applies to the module as a component installed within a listed system, so it is intended to be mounted inside the host power supply or panel enclosure, not run loose.
7) Is this fire relay module suitable for a commercial building egress application, or is it a residential product?
The PDFT is a commercial grade device. It is used to tie a fire alarm signal into electrified door hardware so locks release on alarm, which is a commercial and institutional requirement, and it is one part of a power transfer and relay assembly rather than a standalone door control.
How fast can I get the Alarm Controls PDFT 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 Alarm Controls PDFT come with a warranty?
Absolutely. The Alarm Controls PDFT 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 Alarm Controls PDFT?
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 Alarm Controls PDFT 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.