Stand-alone alarm device with integrated 3G engine.

Up to 8 inputs, 2 outputs, voice announcements, integrated backup batterie

A4101 3G Alarm Device

  • Alarming of a person or group of persons by voice call with a customized voice message.
  • Alarming by email or SMS text message.
  • Acknowledgement key function for each alarm by DTMF.
  • Remote switching by DTMF or text message.
For independant intrusion detection in secured areas and motorhomes or redundant surveillance of  
air conditioning, energy systems and server cabinets etc.
Product info
FAQ Alarmgeräte


Via the A4101 alarm detections can be signaled by voice or text message.  Each input or sensor activity can be signalized to up to five destinations consisting of mobile or fixed-line subscribers or e-mail addresses – therewith you will not miss any alert. Subscribers who receive an alarm call via voice message, can confirm the receipt by a DMTF acknowledgment to prevent further alarming to other participants of the destination list. The two output contacts can be switched by text command or DMTF input. Current switching states can be queried by text command. For your individual voice message you can either use pre-produced WAV-audio files, which can be imported via the WebUI or you set up a call to the A4101 unit in its recording mode and record your message by yourself.

In basic configuration the A4101 has eight digital inputs and two outputs. The device configuration is done by a web interface using a custom browser via the integrated LAN port.

For better redundancy, the A4101 is equipped with an integrated 3G-engine. Maintenance by remote via this 3G-engine will be possible soon. Thus, this device can be used completely independent from the company network. The wide range power supply of 7 to 30 volts, the device is very versatile. The DIN rail housing is easily mounted in popular control cabinets. From the server cabinet to be monitored to the fuse box at home, a cottage, your classic car or a motor home. Extension modules for additional inputs/outputs or sensors are also possible. A battery backup unit for messages in case of power failure is available, too.



The possible applications of this device are very versatile. At this point we want to give you a suggestion and some practical examples where this device can be used and already is in use.

Motor home


.. more typical applications

These are only some examples of the wide practical usability of the A4101. We hope we have given a good deeper view inside of this device.
If you have any specialised requirements – let us know!

Technical data

Radio moduleGemalto Cinterion EHS5-E
EHS5-E: 900 and 2100 MHz
EHS5-E: 900 and 1800 MHz
EHS5-US: 850 and 1900 MHzDual-Band GSM
EHS5-US: 850 and 1900 MHz
mini SIM: 1.8V or 3V
HousingDIN rail
IP20, width 22,50 mm
height: 117mm; depth: 115mm
LAN-interfaceEthernet 10/100 Base-T, RJ45
Antenna connectorSMA
Inputsup to 8 (by terminal strip),
galvanically isolated
Valid voltage range: -30V … +30V
Undefinined voltage range: +1.5V … 4.5V
Detected voltage range: 4,5V … 30V
Outputs2 (terminal strip), relais switched
galvanically isolated
Valid voltage to ground of the A4101
power supply: -30V … +30V
Max. switching circuit: 1A
Type: normally closed contact or
normally open contact
Power supply sensor1 (internal)
effective range: 4.5V … 30V
Resolution: 0.1V
Max. deviation
from 7V to 30V: 0.3V
Watchdog (internal)1 (internal)
Alarmingvoice message, email or text message
Power supplyVoltage range for normal operation:
7V … 30V DC (terminal strip)
Acknowledgementby DTMF within a normal voice call
SuperCap (optional)For alarming in case of power failure (black-out)
approx. 1 minute power buffer.
Power consumptionAverage power consumption: 1.2W
(with GSM-module logged on and LAN activity)
Max. power consumption: 5W
(with an active voice call and loading
of the SuperCap battery)
Max. charging time for the backup unit:
10 minutes
Average power consumption in the stand-by mode:
less than 0.5W
Work enviromentOperating temperature range: -20°C … 55°C
Storage temperature range: -40°C … 85°C
Humidity range: 0% to 90%
Subject to modifications!