GSM relay management device


  • GSM 900/1800/1900 MHz relay management device
  • No domain restriction for sending the command
  • Management of one relay output with NO contacts with free call
  • Adjustable time interval of relay output activating after the call
  • Up to 200 GSM numbers that can control relay output
  • Adjustment through SMS or RS232
  • One digital input with ability to notify about status change by SMS
  • RS232 DCE serial interface
  • Power supply range 8 to 30V DC
  • DIN 35mm rail mounting


GSM Key is GSM relay management device that uses GSM network for managing one relay output with free call. Managing of relay output is allowed to numbers defined in list that can contain up to 200 GSM numbers. It is possible to adjust the device with SMS, and to get report about digital input status. Standard RS232 connector is used for simple adjusting of parameters through PC terminal. Antenna is connected on female SMA 50Ω connector. State of the device is indicated with four LED diodes. Device is powered with 8V to 30V dc voltage and is suitable for DIN 35mm rail mounting.


GSM key enables remote management by one free call using one relay output. Device can be configured to send SMS about status changes on digital input. Input and output are galvanicaly isolated, thus enabling easy implementation into system. Relay output has high current capacity, so it can directly drive devices working on 220V.


  • Managing (open/close) electrical gates and barrier gates with free call
  • Door opening and switching lights in objects with interphone systems with free call (buildings, companies ...).
  • Using cell phone as remote controller.


Tri-Band GSM/GPRS 900/1800/1900 MHz
Compliant with GSM phase 2/2+ standard
Output powerClass 4 (2W at 900MHz)
Class 1 (1W at 1800/1900MHz)
SIM cardMini SIM, 1.8V/3.0V
Serial interface RS232DCE configuration, DB9 female
Serial baud rate in command mode9600 bps, 8N1
Digital input1 input with conjoint bulk
Nominal 12V DC – 24V DC max 30V DC
Logic 0 – Input voltage < 4V DC
Logic 1 - Input voltage >5V DC
Relay outputs1 relay with NO contacts, 5A, 30V DC / 250V AC
Working in puls mode with interval of 10ms to 11min
Antenna connectorSMA female, GSM 50Ω antenna with 3m cable included
LED indicationPower ON, GSM ON, Ready, Busy
Power supplyDC power supply, from 8 to 30V
Power supply connectorPluggable screw clamp 5mm, 2.5mm2
Power consumptionStandby 0.2W, max 3W
Dimension70 x 85 x 58 mm (without connection blocks)
Weightcca 150g
Temperature range-20°C to +75°C, 0 to 95% RH (non condensed)
MountingDIN 35mm rail


GSM Key10294GSM relay management device
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SKU# 10294

*Minimum functionality kit needs to include the device, appropriate power supply and GSM antenna. Please note that all accessories are sold separately.


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