Haydon HAY-ACCESS12V5A-4W 12V 5A Access Control PSU with 4-Way Fire Interface

The Haydon HAY-ACCESS12V5A-4W is a boxed 12V DC access-control power supply designed to house and power up to two compatible Paxton Net2 control units. It combines a 5A power module, four fused outputs, a configurable fire-interface relay and space for one 12V 7Ah standby battery inside a tamper-protected metal enclosure.

Key Features

• 12V DC, 5A maximum power module
• Four fused power outputs
• Four switchable outputs through the fire-interface relay
• Normally open or normally closed contact triggering
• Positive or negative voltage triggering from 5–24V DC
• Mounting footprint for up to two Paxton controllers
• Space for one 12V 7Ah standby battery
• Battery charging at up to 0.8A
• Battery, mains, door-open and fault indicators
• Front and rear enclosure tamper protection
• Over-current and overload protection
• Battery over-charge and over-discharge protection
• Universal 100–240V AC mains input
• Metal and self-adhesive controller standoffs included
• Three-year manufacturer warranty

Designed for Paxton Access-Control Installations

The enclosure includes mounting positions for up to two compatible Paxton controllers, including suitable Paxton Net2 installations.

Controller boards shown in manufacturer or distributor images are for illustration only. They are not supplied with the power supply. Installer checks are required to confirm the exact controller dimensions, mounting position, power consumption and cable-clearance requirements.

12V DC, 5A Power Module

The HAY-ACCESS12V5A-4W accepts a mains input of 100–240V AC at 50–60Hz.

Haydon specifies:

• Mains-powered output voltage: 13.2–13.8V DC
• Battery-powered output range: 10.0–13.2V DC
• Maximum output current: 5A
• Maximum battery charging current: 0.8A

Although commonly described as a 12V PSU, its mains-powered output is within the normal charging range required for a 12V standby-battery system. Connected equipment must tolerate the manufacturer’s stated output-voltage range.

The 5A rating must not be treated as five amps available to every output. It is the maximum rating of the power module, shared across the connected system and subject to correct load calculation.

Four Fused Outputs

The integrated distribution board provides four outputs, each protected by an F1.5A fuse.

The outputs can be configured through the fire-interface board so that connected devices respond appropriately when the interface relay is triggered. The total demand across all four outputs must remain within the PSU’s maximum output rating.

This model does not provide four separate 5A outputs.

Configurable Fire-Interface Relay

The interface supports the following trigger arrangements:

• Normally open contact
• Normally closed contact
• Positive voltage trigger
• Negative voltage trigger

Positive and negative trigger inputs accept a signal between 5V and 24V DC.

The fire interface can be used as one component within a correctly designed access-control release arrangement. This PSU is not a complete fire-alarm panel, and connection to a fire-alarm or life-safety system must be designed, installed and tested by appropriately qualified professionals.

Standby-Battery Support

The enclosure accommodates up to one 12V 7Ah standby battery. The battery is charged by the PSU at up to 0.8A and can continue supplying compatible connected equipment during a mains-power interruption.

A battery is not included.

The actual standby period depends on:

• The current drawn by the controllers
• Electric locks and other connected hardware
• The condition and age of the battery
• Whether locks are fail-safe or fail-secure
• Cable losses
• Environmental conditions
• The system’s required operating sequence

tatus Indicators and Tamper Protection

Panel indicators provide information for:

• Battery status
• Mains status
• Door-open status
• Fault status

The metal enclosure also includes front and rear tamper protection to support detection of unauthorised opening or removal when correctly connected to a compatible monitoring input.

Tamper switches provide a monitoring signal only; they do not physically prevent the enclosure from being opened.

Electrical Protection

Haydon lists the following protective functions:

• Over-current protection
• Overload protection
• Battery over-charge protection
• Battery over-discharge protection

The manufacturer specifies an F3A mains fuse, F5A output fuse, F1A charger fuse and four F1.5A fused distribution outputs. Replacement fuses must match the manufacturer’s specified type and rating.

Technical Specifications

The specifications above are based primarily on Haydon’s product page and product-specific technical datasheet.

Accessories Supplied

Haydon’s datasheet lists the following accessories:

• 1 × 5A fuse
• 1 × 3A fuse
• 1 × 1.6A fuse
• 1 × PG11 cable gland
• 2 × M20 rubber grommets
• 8 × self-adhesive M4 standoffs
• 8 × metal M4 standoffs
• 16 × M4 screws