1. Introduction
The Alpha Communications NX3301 Keypad Module is a robust, stand-alone access control keypad designed for seamless integration with Nexa series Stainless Steel (INOX) door panels and modules. This unit offers advanced security features, including a backlit numeric keypad with durable stainless steel covered push buttons and a built-in tamper alarm. It supports up to 1,000 programmable 4, 5, or 6-digit entry codes, making it suitable for a wide range of access control applications. The NX3301 can be powered by either a 12VAC or an 18VDC to 24VDC power supply.
Figure 1: Front view of the NX3301 Keypad Module. This image displays the front of the NX3301 keypad module. It features a brushed stainless steel surface with twelve circular push buttons arranged in a 4x3 grid. The buttons are numbered 1 through 9, followed by 'C' (Clear), '0' (Zero), and a key symbol. Two small indicator lights are visible at the top center of the panel.
2. Key Features
- Selectable acoustic acknowledgement signal on push for user feedback.
- Backlit numeric keypad with robust stainless steel covered push buttons for durability and visibility.
- Remote activation inputs that can be enabled or disabled through a programmable code, offering flexible control.
- Capacity for 1,000 unique codes (4, 5, or 6 digits in length). Each code can be programmed to activate a combination of outputs.
- User codes and special codes can be modified without the need to enter a dedicated programming mode, simplifying management.
3. Specifications
| Feature | Detail |
|---|---|
| Model Number | NX3301 |
| Manufacturer | Alpha Communications |
| Material | Stainless Steel |
| Power Supply | 12VAC or 18VDC to 24VDC (separate power supply required) |
| Relay Outputs | 2 relay outputs (Normally Open/Normally Closed selectable) with independent remote activation input and panic function |
| Code Capacity | 1,000 codes (4, 5, or 6 digits) |
| Outside Dimensions (W x H x D) | 4.00 inches x 4.625 inches x 1.50 inches (10.16 cm x 11.75 cm x 3.81 cm) |
| Item Weight | 6.4 ounces (0.18 kg) |
| Included Components | Nexa Panel Access Control Keypad Module |
4. Setup
4.1 Unpacking and Inspection
Carefully remove the NX3301 module from its packaging. Inspect the unit for any signs of damage during transit. Report any damage to your supplier immediately.
4.2 Mounting
The NX3301 is designed to be integrated into Nexa series door panels. Ensure the mounting location is secure, dry, and protected from extreme weather conditions unless specifically rated for outdoor use. Follow the specific mounting instructions provided with your Nexa door panel for proper installation of the module.
4.3 Power Connection
Connect the NX3301 to a dedicated 12VAC or 18VDC to 24VDC power supply. Ensure the power supply meets the module's requirements and is installed according to local electrical codes. Incorrect voltage or polarity can damage the unit.
- Identify the power input terminals on the NX3301.
- Connect the positive (+) lead from the DC power supply (or one AC lead) to the designated positive/AC terminal.
- Connect the negative (-) lead from the DC power supply (or the other AC lead) to the designated negative/AC terminal.
- Ensure all connections are secure and insulated.
4.4 Relay Wiring
The NX3301 features two relay outputs (N/C or N/O) for controlling access devices such as door strikes or magnetic locks. Wire these relays according to the requirements of your access control system.
- Identify Relay 1 and Relay 2 terminals (Common, Normally Open, Normally Closed).
- Connect the appropriate relay terminals to your access control device. For example, for a fail-secure door strike, you might use the Normally Open (N/O) and Common (COM) terminals.
- Ensure all wiring is correct and secure to prevent malfunctions.
4.5 Remote Activation Input
If utilizing the remote activation feature, connect the remote activation input to the appropriate trigger device (e.g., a push-to-exit button). Refer to the wiring diagram provided with your specific installation for detailed connections.
5. Operating Instructions
5.1 Initial Power-Up
Upon initial power-up, the keypad will perform a self-test. The backlight should illuminate, and a default status indicator may appear. Refer to the programming guide for initial setup and default codes.
5.2 Entering User Codes
To gain access, simply enter your valid 4, 5, or 6-digit user code on the keypad. After entering the code, the system will process it. If the code is valid, the associated relay output(s) will activate, and an acoustic acknowledgement signal may sound (if enabled).
5.3 Programming User Codes
The NX3301 allows for easy programming of up to 1,000 user codes. The specific steps to enter programming mode and add/delete/modify codes are detailed in the comprehensive programming manual that accompanies the product. Generally, this involves entering a master programming code followed by specific sequences for code management.
5.4 Changing User Codes
A key feature of the NX3301 is the ability to change user codes and special codes without needing to enter a full programming mode. This simplifies routine security adjustments. Consult the programming manual for the specific sequence to modify existing codes.
5.5 Acoustic Acknowledgement Signal
The keypad provides a selectable acoustic acknowledgement signal when a button is pushed or a valid code is entered. This feature can be enabled or disabled through programming to suit user preference and environment.
5.6 Remote Activation
If configured, the remote activation inputs allow for external triggers (e.g., a push button inside the premises) to activate the relay outputs. This function can also be enabled or disabled via programming.
5.7 Tamper Alarm
The NX3301 includes a built-in tamper alarm. Any attempt to forcibly remove or tamper with the module may trigger this alarm, providing an additional layer of security. The alarm output can be connected to an external alarm system.
6. Maintenance
6.1 Cleaning
To clean the stainless steel surface of the NX3301, use a soft, dry, lint-free cloth. For stubborn marks, a slightly damp cloth with mild soap can be used, followed by immediate drying. Avoid abrasive cleaners, solvents, or harsh chemicals, as these can damage the finish and electronic components.
6.2 Connection Check
Periodically inspect all wiring connections to the module to ensure they remain secure and free from corrosion. Loose connections can lead to intermittent operation or system failure. Ensure power is disconnected before checking any wiring.
7. Troubleshooting
7.1 Keypad Not Responding / No Power
- Check Power Supply: Verify that the power supply is correctly connected and providing the required 12VAC or 18-24VDC.
- Wiring: Inspect all power wiring for loose connections, breaks, or shorts.
- Fuse/Breaker: Check if any fuses or circuit breakers associated with the power supply have tripped.
7.2 Valid Code Not Granting Access
- Code Entry: Ensure the correct 4, 5, or 6-digit code is being entered precisely.
- Code Validity: Verify that the code is still active and has not been deleted or changed.
- Relay Wiring: Check the wiring between the NX3301's relay outputs and the access device (e.g., door strike).
- Access Device Functionality: Test the access device independently to ensure it is working correctly.
- Output Programming: Confirm that the code is programmed to activate the correct relay output(s).
7.3 Tamper Alarm Constantly Active
- Mounting: Ensure the module is securely mounted and not loose, which could trigger the tamper switch.
- Physical Damage: Inspect the unit for any physical damage or signs of attempted tampering.
- Wiring: Check the tamper alarm wiring for shorts or incorrect connections.
7.4 Backlight Not Working
- Power Supply: Ensure the power supply is stable and sufficient.
- Settings: Check if the backlight feature has been disabled through programming.
If you encounter issues not covered in this section, please refer to the detailed programming manual or contact a qualified technician.
8. Warranty and Support
8.1 Warranty Information
Specific warranty details for the Alpha Communications NX3301 Keypad Module are typically provided at the point of purchase or within the product packaging. Please retain your proof of purchase for warranty claims. The warranty generally covers manufacturing defects under normal use conditions.
8.2 Technical Support
For technical assistance, programming inquiries, or troubleshooting beyond the scope of this manual, please contact your authorized Alpha Communications dealer or installer. Contact information may also be available on the manufacturer's official website.
