Security Brands 55-T12 7 Day Digital Timer 12 VDC

Security Brands 55-T12 7 Day Digital Timer 12 VDC

The Security Brands 55-T12 is a 7-day digital quartz timer used when an access-control device or operator input needs to follow a weekly schedule. In gate work, timers are often used for hold-open schedules, business-hour access, keypad or relay enable windows, magnetic lock schedules, or auxiliary control circuits. The 55-T12 is the 12 VDC version, so voltage matching is the most important ordering detail. A 12 VDC timer installed on a 24 volt or 110 volt circuit can be damaged or create an unsafe condition. This part should be selected by input voltage, desired switching schedule, relay/load requirements, and enclosure location.

Compatible With

• 12 VDC access-control circuits requiring scheduled switching
• Security Brands / AAS gate access installations using a compatible 12 VDC timer input
• Keypad, receiver, relay, mag lock, door, or gate control circuits where the timer rating is suitable
• Business-hour access schedules, hold-open schedules, and auxiliary control timing
• Previously referenced as S-T12 in Security Brands timer family listings
• Not interchangeable with 55-T24 or 55-T110 unless the control voltage is changed and approved

Features and Specifications

Also Known As / Related Part Numbers

• 55-T12
• 55T12
• S-T12
• ST12
• Security Brands 7-Day Timer 12 VDC
• AAS 55-T12
• American Access 55-T12
• 7-day digital quartz timer
• 12 VDC timer

Technician Note

Power-management and timer parts should be matched by voltage, load requirements, battery type, and enclosure location. Do not guess on voltage or wire a high-voltage timer into a low-voltage circuit.

Before Ordering

• Confirm the manufacturer part number and any old/new part number references.
• Match the product family and application, not just the brand name.
• Check voltage, frequency, activation method, receiver family, or battery type as applicable.
• Review the existing wiring, mounting location, and enclosure before replacing the part.
• For fire access or line-voltage work, confirm local code and use a qualified professional when required.

Professional Advisory

Access-control and power-management parts should be installed in accordance with the gate operator, access controller, local code, and site safety requirements. For high-voltage wiring, fire department access, or unsafe gate movement, use a qualified gate technician or licensed professional where required.

Product Questions and Answers

What voltage is the 55-T12 made for?

The 55-T12 is the 12 VDC version of the Security Brands 55-T timer family.

Is 55-T12 the same as S-T12?

Security Brands lists 55-T12 as previously S-T12.

Can it be used for a gate hold-open schedule?

Yes, it may be used for a compatible hold-open or access schedule when the operator/control circuit supports that function.

How many programs does the timer support?

The timer family is listed with 8 ON/OFF programs and up to 56 weekly settings.

Can I replace a 24 volt timer with this 12 volt timer?

No. Use the timer voltage that matches the control power. For 24 VAC/DC use 55-T24, and for 110 VAC use 55-T110.