AutoLog® 20AN RTU
Flagship modular RTU · Radio / TCP/IP / GSM / TETRA
Modular RTU built on the proven AutoLog 20AN PLC platform. Eight digital inputs, eight digital outputs, zero-to-eight freely-configurable analog inputs and two analog outputs on the CPU card; expandable up to five I/O cards for a maximum 72 AI / 34 AO / 72 DI / 72 DO. Two serial ports with Modbus RTU master/slave. Communication module selectable per project: AutoLog WSN radio modem on 138-175 / 406-512 / 869-870 / 820-950 MHz, Modbus TCP, GSM GPRS/SMS or TETRA SDS. Web Studio SCADA on the control-room side, with Normal or Redundant operation modes. Manufactured in Finland.
Inputs & outputs (CPU card)
- Analog inputs
- 0–8× 12-bit (0–4000), freely-selectable per point: 4..20 mA, 4..20 mA isolated, Pt100 (−50..150 °C / 0..500 °C / −250..750 °C), KTY10, NTC, 0..2 V, 0..5 V, 0..10 V, ±10 V, 0..5 mA, 0..20 mA, RMS 40 VAC / 25 VAC / 0.25 VAC
- Analog outputs
- 2× 12-bit, 0..5 V / 0..10 V
- Digital inputs
- 8× 12/24 VDC, max 8 mA, PNP, opto-isolated
- Digital outputs
- 8× 12/24 VDC, max 2 A (group max 4 A), NPN, opto-isolated
I/O expansion (I²C bus)
- Capacity
- Up to 5 expansion cards on the CPU's I²C bus
- Maximum totals
- 72 AI / 34 AO / 72 DI / 72 DO
- I²C port
- Also drives HMI keypad & LCD display
Communication
- Serial ports
- 2× RS232, Modbus RTU master/slave
- OPT1 — Radio modem
- AutoLog WSN, up to ~40 km line-of-sight at 5 W, bands 138-175 / 406-512 / 869-870 / 820-950 MHz
- OPT2 — TCP/IP
- Modbus TCP
- OPT3 — GSM
- GSM GPRS and SMS
- OPT4 — TETRA
- TETRA SDS
Power & data
- Powering
- 12/24 VDC or 10/18 VAC, max 5 VA; voltage-drop alarm
- UPS
- 12 VDC backup with voltage-drop alarm
- Programming
- Remote via radio network, or local via programming cable
- Data logging
- E.g. 16 time-stamped measurements × 3 000 records
SCADA
- Software
- Web Studio SCADA
- Operation modes
- Normal or Redundant
- Web support
- Control-room views accessible from any Intranet PC; configurable user levels and firewall security
Environmental
- Operating range
- −30 to +65 °C (Enhanced WRMU variant: +70 °C)
- Storage range
- −40 to +80 °C
- Made in
- Finland