AutoLog® GSM-20
Flagship GSM-RTU · External GSM/GPRS modem · I²C expansion
The largest GSM-RTU in the family. On-board: eight digital inputs (max 24 with AI2DI), eight digital outputs, eight freely-selectable analog inputs and two analog outputs. Expandable via two I²C buses with up to five expansion cards — reaching 72 AI / 34 AO / 72 DI / 72 DO. Two serial ports — RS485 and Ethernet available as plug-in modules. Communicates via SMS, GPRS, Modbus RTU master/slave or Modbus TCP. Connects to AutoLog® Wireless I/O & Sensors and any AutoLog® HMI. Programmed in AutoLog GsmProgrammer with 512 programming lines, built-in PID controllers, FTP data logging and advanced SMS generation.
Inputs & outputs (CPU card)
- Analog inputs
- 0–8× 12-bit (0–4000), freely-selectable per point: 4..20 mA, 4..20 mA isolated, Pt100, KTY10, NTC, 0..5/10 V, ±10 V, RMS AC
- Analog outputs
- 2× 0–5 V / 0–10 V, 12-bit (4..20 mA on request)
- Digital inputs
- 8× 24 VDC, opto-isolated, PNP, max 8 mA (up to 24 with AI2DI modules)
- Digital outputs
- 8× 24 VDC NPN, max 2 A (group max 4 A); optional DIN-rail relays
- HMI support
- Keypad & LCD via I²C; touch screen via serial port 2 (Modbus)
I/O expansion (I²C bus)
- Capacity
- Up to 5 cards across two I²C buses on the CPU card
- Maximum totals
- 72 AI / 34 AO / 72 DI / 72 DO
- AL20 DI16 (900775)
- 16× DI, 24 VDC, max 8 mA, potential-free contact, PNP
- AL20 DI64 (900773)
- 64× DI, 24 VDC, max 8 mA, potential-free contact, PNP
- AL20 DO32 (900772)
- 32× DO, 24 VDC, max 1 A, NPN
- AL20 RIO8 (900765)
- 8× DI + 8× relay outputs, 24–230 VAC, max 3 A
- AL20 RO16 (900779)
- 16× relay outputs, 24–230 VAC, max 3 A
- AL20 EXA 8/4 (900837)
- 8× AI (plug-in analog modules sold separately) + 4× AO
Communication
- Serial port 1
- RS232 (GSM modem / programming), RJ45, 9600 bps
- Serial port 2
- RS232 / opt. RS485 / opt. Ethernet (plug-in)
- Protocols
- Modbus RTU master/slave, Modbus TCP, SMS, GPRS
- Speed
- 300–57600 bps
- GSM/GPRS
- External modem on serial port 1, powered from CPU card, SMA antenna (internal or external)
Power
- Powering
- 12–30 VDC / 12–24 VAC; ext. 230/110 VAC available
- Power output
- 12/24 VDC for GSM modem & accessories, optional over-charge protector
Programming & memory
- Programming
- AutoLog GsmProgrammer (Windows), 512 lines, PID, FTP, RTC
- Battery backup
- RTC + calendar + program memory
- Storage
- Flash memory for application + data
- Indicators
- LEDs for Rx/Tx, GSM modem, DI/DO, RUN
- Switches
- 4 jumpers + 6 DIP switches
Environmental
- Operating range
- −30 to +70 °C
- Storage range
- −40 to +80 °C
- Humidity
- 95% non-condensing
- EMC immunity
- EN 50082-1 / EN 50082-2
- EMC emissions
- EN 50081-1 / EN 50081-2
Physical
- CPU card size
- 220 × 125 × 65 mm, 0.3 kg
- Enclosure
- Optional, up to IP68. ABS / Polycarbonate / Stainless steel. Wall, pole, ATEX options.
- Made in
- Finland