Ajax KeyPad Plus Jeweler Black: Wireless Touch Keypad with Contactless Authentication and Advanced Security
38252.83.BL1 #38252 | Ajax KeyPad Plus Jeweller black is a wireless touch keypad designed for maximum security thanks to DESFire contactless authentication, advanced access codes and tamper protection . Jeweller communication ensures encrypted connections up to 1,700 m, while built-in functions such as duress codes , auto-wake and a panic button improve the management of professional alarm systems. Installation is quick via SmartBracket , compatible with Ajax system hubs and repeaters, offering a stylish and reliable device for residential and commercial security. Ajax
referencia : 38252.83.BL1
brand : Ajax Systems
EAN: 4823114015403
Disponibilità: 6
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38252.83.BL1 | WIRELESS TOUCH KEYBOARD SUPPORTING CONTACTLESS ENCRYPTED CARDS AND KEYFOBS

The Ajax KeyPad Plus Jeweller, 38252.83.BL1, black is a wireless touch keypad designed to ensure fast and secure control of your burglar alarm system thanks to DESFire contactless authentication, customizable access codes , and tamper protection , offering professional performance in any environment. Jeweller technology ensures encrypted communication up to 1,700 m, while simplified installation with SmartBracket and compatibility with Ajax hubs make this keypad a reliable and elegant solution for advanced security management.
Main specifications:
- DESFire contactless authentication, protected passes and tags
- User and coercive codes, remote management and anti-guessing
- Tamper protection and communication loss detection
- Encrypted Jeweler communication up to 1,700 m
- SmartBracket installation without disassembling the device
- Panic button and auto-wake on entrance
Further details
Technical data sheet
| 38252.83.BL1 | |
| Communication | |
| Jeweler communication technology | Proprietary wireless communication technology to transmit commands, alarms, and events. Key features:
|
| Radio frequency bands | 866.0 - 866.5 MHz 868.0 - 868.6 MHz 868.7 - 869.2 MHz 905.0 - 926.5 MHz 915.85 - 926.5 MHz 921.0 - 922.0 MHz Depence on the sales reaction |
| Maximum effective radiated power (ERP) | up to 20 mW Automatic power control to reduce power consumption and radio interference. |
| Radio signal modulation | GFSK |
| Radio signal range | Up to 1,700 m up to 5,600 ft Between the detector and a hub (or radio signal range extender) in an open space. |
| Encrypted radio communication | All the data stored and transmitted are protected by block encryption featuring a dynamic key. |
| Frequency hopping | To prevent radio interference and jamming |
| Key features | |
| Sensor type | capacitive |
| Malfunctions and security mode indication | When KeyPad is active, it notifies with LED indication of the security mode, problems with detectors, or communication loss with the hub |
| Functional button | Operates in one of the modes alarm The system sends an alarm to the central monitoring station and users. It also activates the sirens connected to the system mute fire alarm Mutes interconnected fire detectors alarms off The button is disabled |
| Control | codes Pass cards Tag key fobs The functionality of the cards/key fobs is the same, but they differ in design. |
| Access via DESFire® | EV1, EV2 The technology is based on the ISO 14443 international standard and combines 128-bit encryption and copy protection. |
| Access codes | up to 200 personal codes One code for each user. The number of personal access codes depends on the hub model 1 keypad code One code per KeyPad |
| Duress codes | up to 200 personal codes One code for each user. The number of personal access codes depends on the hub model 1 keypad code One code per KeyPad |
| Codes for unregistered people | up to 99 personal codes For people who are not registered in the system. The number of such codes depends on the hub model |
| Group security management | Enter the general keypad code and the group ID to manage group security |
| Recommendations | The device is designed for indoor use only. |
| Sabotage protection | |
| Protection against code guessing | KeyPad locks for 3–180 minutes if an incorrect code is entered more than 3 times in a row within 1 minute. PRO or user with admin rights can adjust the lock time in the Ajax app |
| Tamper alarm | Notifications on attempts to detach the device from the surface or remove it from the mounting panel. |
| Protection against spoofing | device authentication |
| Communication loss detection | after 36 s Detection time depends on the Jeweler or Jeweller/Fibra settings. |
| Power Supply | |
| Battery | 4 × AAA Pre-installed. |
| Type | Type C |
| Calculated battery life | up to 3 years |
| Detector's operating voltage range | 2.25–3.3 V⎓ |
| Device's nominal operating voltage | 3 V⎓ |
| Quiescent device's current consumption at nominal voltage | 0.064 mA |
| Maximum device's current consumption at nominal voltage | 165 mA |
| Full capacity | 12,000 mAh Capacity of each battery is 3,000 mAh. |
| Low battery voltage | 2.5 V⎓ |
| Low battery recovery voltage | 2.7 V⎓ |
| End-of-life battery voltage | 2.25 V⎓ Device is switched off. |
| End-of-life battery capacity | 150 mAh End-of-life capacity of each battery is 250 mAh. |
| Manufacturer | Huiderui UL listed. Energizer |
| Enclosure | |
| Color | Black |
| Dimension | 165 × 113 × 20 mm 6.50″ × 4.45″ × 0.79″ |
| Weight | 267 g 9.42 oz |
| Operating temperature range | from −10 °C to +40 °C from 14 °F to 104 °F Temperature range from 32 °F (0 °C) to 120 °F (+49 °C) is certified according to UL/ULC standards |
| Operating humidity | up to 75% Humidity of up to 93% is certified according to UL/ULC standards |
| Complete set | KeyPad Plus Jeweler SmartBracket mounting panel 4 × ААА battery (pre-installed) Installation kit Quick start guide |
| Warranty | 24 months |



