About the product

iSMA-B-AAC20-LCD-M controller (iSMA-B-AAC20)with inbuilt display and M-Bus for up to 20 devicesis an advanced device to control building automation and HVAC systems. Use of SVM (Sedona Virtual Machine) allows you to finish the setup quickly and easily. It is ideal for smaller projects where you want to stay open protocol while keeping the development simple and the cost under budget.

Big, fully programmable LCD can be used as simple user interface to allows local operation of system. The MbusInterfaceallows you to pick up max 20 meters.

With the large number of inputs and outputs allows to integrate with other devices and sensors (AAC20 provides 8xUI, 4xDI, 4/6xAO and 4xDO). Its fast processor allows to control of even very large objects. Built-in RS485 can be used to expand number of I/O by connecting MINI or MIX series I/O modules using Modbus ASCII/RTU. In addition, to increase the versatility of the controller, it supports many open communications protocols like: BACnet, Modbus, SOX, DALI, M-Bus, 1-wire or oBIX (optional). AAC20 is mounted in a housing adapted for DIN rail mounting or directly on a panel. Separate, easy to remove connectors allow quick wiring without removing the entire module.

Inputs & Outputs
8xUniversal Inputs (8UI)
All universal inputs have 16-bit resolution which support the following types of inputs:

• Temperature input support the following types of sensors: 10K3A1, 10K4A1, Carel 10K, 20K6A1, 2.2K3A1, 3K3A1, 30K6A1, SIE1, TAC1, SAT1, Pt1000, Ni1000

For sensor Pt1000 and Ni1000 use only 16bit resolution

• Voltage input 0-10VDC: input resistance 100k accuracy 0,1% measurement resolution 3mV@12bit and 1mV@16bit
• Current input 0-20mA (external resistor 499 required)
• Resistive input 0-1000k: measurement resolution for 20k load 20@12bit and 1@16bit
• Dry contact input

4 x Digital Inputs (4DI)

• Dry contact inputs
• Fast pulse counter up to 100Hz

4/6 x Analog Outputs (4/6AO)
All analog outputs are equipped with 12-bit ADC provides10 mV resolution and accuracy less than 0,5%. They support the following output types:

• Output 0-10V DC maximum load up to 20mA(5mA- AO6)
• PWM: 0,01Hz, 0,1Hz, 1Hz, 10Hz, 100Hz

AO5 and AO6 can only be used if 1-wire port is not in use, please notice for AO6 maximum current load is up to 5mA
4 x Digital Outputs (4DO)

• Relay output (NO) max. 3A, 250 VAC/30 VDC

Platform

• ARM Cortex-M4 204MHz
• ARM Cortex-M0 204MHz

Communication

• Interface RS485 half duplex
• Baud rate: 2400 to 115200 bps
• 2xEthernet with built in switch
• 1-Wire Interface
• Micro SD card slot
• USB Host Interface
• Protocols: Modbus, BACnet, 1-wire, oBIX

Power supply

• 24V AC/DC

Housing

• Dimension: 106x110x62 mm.
• Construction: plastic, self-extinguishing (PC/ABS)
• DIN rail mounting (DIN EN 50022 norm)
• Cooling: internal air circulation

Environments

• Operating temperature: -10C to 50C
• Storage temperature: -40C to 85C
• Relative humidity: 5 to 95%, no condensation
• Ingress Protection Rating: IP40 for indoor installation

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