Provide authorized postal carrier access to a multi-tenant building with the Aiphone GT-OP3 3-Module Postal Lock Panel with Frame.

Designed for Aiphone GT Series multi-tenant entrance systems, the GT-OP3 provides a dedicated mounting location for a Post Office-supplied postal lock and includes the relay circuitry necessary to activate compatible electric locking hardware when the postal lock is operated.

The GT-OP3 also includes an open module position at the top of the panel, allowing an additional compatible GT Series module to be incorporated into the assembly.

Key Features

• Genuine Aiphone GT-OP3

• 3-module postal lock panel with frame

• Designed for Aiphone GT Series

• Provides building entry using a Post Office-issued key

• Accepts postal lock supplied by the Post Office

• Built-in door-release relay circuitry

• Adjustable 5–20 second relay activation

• Normally Open and Normally Closed relay outputs

• High-capacity door-release contacts

• Open top position accepts an additional GT Series module

• Vandal-resistant construction

• Zinc die-cast material

• 24VDC operation

• Designed for electric strike or magnetic lock applications

• Flush or surface mounting

• Uses Aiphone #872002 wiring

• TAA compliant

• Made in USA

Product Specifications

Manufacturer: Aiphone
Model: GT-OP3
Series: GT Series
Product Type: 3-Module Postal Lock Panel with Frame
Postal Lock: Supplied Separately by Post Office
Power Requirement: 24VDC
Recommended Power Supply: PS-2420UL
Relay Timer: Adjustable Approximately 5–20 Seconds
Relay Output: Form C / N.O. & N.C.
N.O. Rating: 30VDC 5A / 125VAC 10A / 250VAC 3A
N.C. Rating: 30VDC or 125VAC 3A
Auxiliary Switch Output: N.C.
Switch Rating: 30V AC/DC, 1A
Wiring: 2-Conductor, Non-Shielded
Recommended Wire: Aiphone #872002 Series
Material: Zinc Die Cast
Mounting: Semi-Flush or Surface Mount
Flush-Mount Back Box: GF-3B
Height: 12-5/8"
Width: 5-5/16"
Overall Depth: Approximately 2"
Operating Temperature: 14°F to 140°F (-10°C to 60°C)
TAA Compliant: Yes
Country of Origin: USA

Postal Carrier Access

The GT-OP3 allows authorized postal personnel to enter a secured multi-tenant building using a postal-service-issued key.

The postal lock mounts behind the dedicated key opening in the GT-OP3 panel.

When the postal carrier operates the lock:

1. The postal lock activates the GT-OP3 circuitry

2. The GT-OP3 relay changes state

3. The connected electric locking hardware releases

4. The entrance remains unlocked for the programmed relay time

5. The relay automatically returns to its normal state

This allows postal delivery access without requiring residents or building staff to remotely release the door.

Important: Postal Lock Not Included

The GT-OP3 provides the mounting provision and release circuitry for a postal lock.

The actual postal lock is:

Provided by the applicable Post Office / Postal Service

It is not supplied with the GT-OP3.

Building owners or installers should coordinate postal-lock installation with the appropriate local postal authority.

Adjustable 5–20 Second Relay Timer

The GT-OP3 incorporates an adjustable timer relay.

Door-release activation can be set for approximately:

5 to 20 Seconds

This allows the installer to provide enough time for postal personnel to open the entrance after turning the postal key.

The relay automatically resets after the programmed time.

High-Capacity Door Release Relay

The GT-OP3 provides both Normally Open and Normally Closed relay contacts.

Normally Open

Rated:

• 30VDC – 5A

• 125VAC – 10A

• 250VAC – 3A

Normally Open operation is commonly used with compatible electric strikes and similar fail-secure locking devices.

Normally Closed

Rated:

• 30VDC – 3A

• 125VAC – 3A

Normally Closed operation can be used with compatible fail-safe locking equipment such as certain magnetic-lock applications.

Always verify the voltage, current, and code requirements of the connected locking hardware.

Electric Strike Applications

For a typical electric-strike installation, the GT-OP3 can switch external lock power through its relay.

The primary relay leads include:

• Blue – Common

• Orange – Normally Open

• Yellow – Normally Closed

For a typical fail-secure electric strike, the Common and Normally Open contacts are commonly used.

Lock power is supplied separately according to the requirements of the electric strike.

Magnetic Lock Applications

For compatible magnetic-lock applications, Aiphone specifies use of the:

• Blue – Common

• Yellow – Normally Closed

relay leads.

Because electromagnetic locks are normally fail-safe devices, the relay interrupts power when postal access is authorized.

Always design magnetic-lock installations according to applicable life-safety, fire, and egress requirements.

Auxiliary Postal Lock Switch

The GT-OP3 also provides an auxiliary switch connection:

• Green – Common

• White – Normally Closed

Switch rating:

30V AC/DC, 1A

This contact can be used in applicable installations where a direct postal-lock switch output is required.

Unused leads should be properly isolated according to Aiphone installation instructions.

24VDC Power

The GT-OP3 relay circuitry operates on:

24VDC

Aiphone specifies the:

PS-2420UL – 24VDC, 2A Power Supply

for applicable GT-OP3 installations.

The 24VDC relay input uses the factory-provided:

• Red lead

• Black lead

Power-supply quantity depends on the complete entrance-system configuration.

Open Top Module Position

A major difference between the GT-OP3 and the smaller GT-OP2 is the additional open module position.

The top position of the GT-OP3 can accept another compatible GT Series module.

The additional module is sold separately.

Possible choices depend on the overall entrance-system design and can include compatible GT modular equipment.

Module Position Must Be Filled

When installing the GT-OP3, the available top module position should be populated with an appropriate module or panel.

Examples may include:

• GT Series functional module

• Access-control module

• Compatible blank panel

The selected component must be purchased separately.

GT Series Modular Integration

The GT-OP3 is designed to install alongside a GT Series entrance panel.

A complete entrance system may include equipment such as:

• GT-DB / GT-DB-VN – Audio Module

• GT-DBP – Audio Module Panel

• GT-VB – Camera Module

• GT-VP – Camera Panel

• GT-SW – Call Switch Module

• GT-NSB – Digital Directory Module

• GT-10K – Keypad Module

• GT-HID – HID Reader Module

• GT-AC – Access Control Keypad

• GT-OP3 – Postal Lock Panel

This allows postal access to be incorporated into the same entrance assembly as the building intercom.

Flush-Mount Installation

For semi-flush installation, Aiphone specifies the:

GF-3B – 3-Module Back Box

The GT-OP3 mounts over the recessed back box to create a lower-profile entrance installation.

The GF-3B is sold separately unless included as part of a project-specific package.

Surface-Mount Installation

The GT-OP3 can also be surface mounted.

The appropriate surface-mount enclosure depends on the overall entrance-panel configuration and arrangement.

Aiphone notes that when certain hooded surface boxes are used, modification of the lower hood lip may be required to provide clearance for the postal lock.

Always follow Aiphone's GT-OP2/GT-OP3 installation instructions before modifying an enclosure.

Recommended Wiring

The GT-OP3 uses:

2-Conductor, Non-Shielded Cable

Recommended Aiphone wire includes:

• 87200250C – 20 AWG | 500'

• 87200210C – 20 AWG | 1,000'

• 872002P10C – 20 AWG | Plenum | 1,000'

Separate conductors are required for the connected locking hardware according to its electrical requirements.

Vandal-Resistant Construction

The GT-OP3 is designed for secured multi-tenant building entrances.

Its zinc die-cast construction provides durability for high-traffic entrance environments.

It is suitable for installations such as:

• Apartment buildings

• Condominium complexes

• Multi-family properties

• Mixed-use developments

• Student housing

• Senior-living communities

• Controlled-access commercial buildings

GT-OP3 vs. GT-OP2

Aiphone offers two postal-lock assemblies.

GT-OP2

2-Module Postal Lock Panel

Designed for smaller configurations.

Typical flush mounting:

GF-2B

GT-OP3

3-Module Postal Lock Panel

Provides the postal-lock function plus:

One additional open module position

Typical flush mounting:

GF-3B

Choose the model according to the required entrance-station layout.

TAA Compliant

Aiphone lists the GT-OP3 as:

TAA Compliant

Country of origin:

USA

This can make the GT-OP3 suitable for applicable government, institutional, and federally funded projects requiring TAA-compliant equipment.

Ideal Applications

• Apartment buildings

• Condominium complexes

• Multi-family residential buildings

• Mixed-use properties

• Student housing

• Senior-living facilities

• Commercial multi-tenant buildings

• Controlled-access entrances

• USPS / postal carrier building access

• GT Series intercom entrances

• Existing entrance-system upgrades

Important Ordering Information

This listing is for the Aiphone GT-OP3 Postal Lock Panel with Frame and release circuitry.

Postal Lock

The actual postal lock is not supplied by Aiphone.

It must be obtained through and installed in coordination with the applicable Post Office / postal authority.

Additional Top Module

The GT-OP3 includes an open position for an additional GT Series module.

The additional module is not included and must be ordered separately.

Other equipment sold separately may include:

• GF-3B back box

• Surface-mount enclosure

• PS-2420UL power supply

• Electric strike

• Magnetic lock

• Lock power supply

• Additional GT module

• GT Series entrance equipment

• Aiphone #872002 wire

• Other intercom-system components

Verify the locking hardware, mounting arrangement, and postal authority requirements before ordering.