AutoLog® AL-20AN PLC
Flagship modular OEM-PLC · 5 I/O expansion cards · 32 PID
AL-20AN is the OEM PLC platform that powers most of the AutoLog® RTU range. Eight digital inputs (max 72), eight digital outputs (max 72), zero-to-eight 12-bit analog inputs (max 72) and two 12-bit analog outputs (max 34) on the CPU card; 64 relay outputs reachable via the RO16 expansion card. Two serial ports with Modbus RTU master/slave simultaneously, two I²C ports — one for HMI/iButton, one with an RJ45 connector for the I/O expansion-card bus. 32 PID controllers, 8 000 program lines, 512 kB RAM + 512 kB FLASH.
Inputs & outputs (CPU card)
- Digital inputs
- 8× (max 72) 12/24 VDC, max 8 mA, PNP, opto-isolated
- Digital outputs
- 8× (max 72) 12/24 VDC, max 2 A (group max 4 A), NPN, opto-isolated
- Relay outputs
- 0× (max 64 via RO16 card) 12-24 VDC max 3 A, 24-230 VAC
- Analog inputs
- 0–8× (max 72) 12-bit plug-in modules: Pt100 (−50..150 / 0..500 / −250..750 °C), KTY10, NTC, 0..2/5/10 V, ±10 V, 0..5/20 mA, 4..20 mA, RMS 40/25/0.25 VAC
- Analog outputs
- 2× (max 34) 12-bit, 0..5 V / 0..10 V
- I²C ports
- I²C #1: HMI, iButton, etc. · I²C #2 (RJ45): I/O expansion-card bus
- HMI interface
- Character displays to Windows-CE touch screens via I²C #1 or serial port
I/O expansion cards
- AL20 RIO8 (900765)
- 8× DI + 8× relay outputs (24-230 VAC, max 3 A). 130 × 125 × 65 mm DIN-rail
- AL20 RO16 (900770)
- 16× relay outputs (24-230 VAC, max 3 A). 220 × 125 × 65 mm DIN-rail
- AL20 DI16 (900775)
- 16× DI (24 VDC, max 8 mA, potential-free). 130 × 125 × 65 mm DIN-rail
- AL20 DO32 (900772)
- 32× DO (24 VDC, max 1 A). 165 × 125 × 65 mm DIN-rail
- AL20 EXA 8/4 (900837)
- 8× 12-bit AI (plug-in modules separate) + 4× AO (0..5 V / 0..10 V). 115 × 125 × 65 mm DIN-rail
Communication
- Serial port 1 (SER1)
- RS232 (RJ45)
- Serial port 2 (SER2)
- RS232 default; RS485 with AutoLog® Serial Plug-in module
- Modbus RTU
- Master/Slave on both serial ports simultaneously, 300–115 200 bps
- Remote programming
- Over any Modbus-supporting medium (radio, GSM data, RS-485)
- Optional plug-ins
- Modbus TCP gateway, Ethernet LAN web server, Wireless LAN, Wireless I/O master, isolated RS232/485 converter
- GSM/GPRS
- Optional external (or see AutoLog® GSM-20 RTU for an integrated-modem variant)
Programming & memory
- Programming tool
- AutoLog® ALProWin — instruction list & ladder, symbolic names, trends, monitoring tables
- Application memory
- 512 kB FLASH, 8 000 programming lines
- Instructions
- 260+ functions
- PID controllers
- 32 built-in
- Data memory
- 512 kB RAM
- Data logging
- E.g. 10 time-stamped measurements × 3 000 records
- Clock / calendar
- Built-in (remotely settable)
- Battery backup & UPS
- Yes / UPS connector supported
Power & physical
- Powering
- 12/24 VDC or 10/18 VAC, max 5 VA
- Operating range
- −30 to +70 °C
- Storage range
- −40 to +80 °C
- EMC immunity
- EN 50082-1 / EN 50082-2
- EMC emissions
- EN 50081-1 / EN 50081-2
- Enclosure
- Default DIN-rail metal cover (IP20); optional IP65 plastic box or metal box
- Size
- 225 × 125 × 65 mm, ≈ 0.4 kg
- Made in
- Finland
Order code
- AL20AN
- 900761 (AutoLog® 20AN PLC)