QSM-26 is a DIN rail mount GSM/GPRS MODEM. The unit has a built in Quad Band (850/900/1800/1900MHz) Sierra Wireless Q2687 modem, 2 digital inputs, 2 power relay outputs and a serial RS-232 port. Special AT commands are implemented for TCP/IP based communications.


  • 2 digital inputs
  • 2 power relay outputs (Option)
  • AT Command Set for TCP/IP connectivity
  • DIN rail mountable


  • Legacy remote access solutions
  • Industrial automation
  • PLC connectivity
  • Industrial PC connectivity
  • Remote Control & Telemetry
  • M2M

Ordering Codes

Code Description
QSM-26 GSM MODEM, 12...24VDC
QSM-26-R GSM MODEM, 12...24VDC, 2 relay outputs


Power supply
Supply voltage 12-24VDC, 26V max
Supply current average 30mA, 2A peak
Wireless MODEM
Type Sierra Wireless, Q2687
Radio Bands Quad Band GSM (850/900/1800/1900MHz)
Bearer GSM+GPRS Class 10, EDGE Class 10
Approvals R&TTE, CE, GCF, FCC, PTCRB, China RTE, AT&T
TCP/IP Protocols UDP, TCP (Client/Server), FTP, HTTP, SMTP, POP3
RF connector SMA Jack
Digital inputs 2, 0-30VDC
Digital outputs 2, optional, relay 250V/8A (AC1)
Serial interface RS232C, up to 921 kBit/s
Temperature -10°...+55°C, operating
Indications LED, network status
Dimensions 71 x 90 x 58 mm
Weight 0.2 kg
Mounting DIN rail
Command set Sierra Wireless AT + TCP/IP AT command set
Product Brochures
Document File
QSM-26 Technical Brochure QSM26.pdf
Technical Documents
Document File
QSM-26, TCP/IP AT Command Set QSM26_WipAT.pdf
QSM-26, AT Commands Interface Guide QSM-26, AT Commands Interface Guide.pdf