I/O Modules: MIX – RS Series – iSMA-Controlli

Supports Modbus RTU/ASCII and BACnet MS/TP protocols, enabling quick configuration and seamless deployment.

Application

Used in distributed control systems for buildings, HVAC, and data centers.
Applied in building automation projects, industrial plants, control rooms, and energy management systems (BMS).
Ideal for monitoring and controlling devices in environments requiring system expansion through Modbus or BACnet protocols.

iSMA-B-MIX-RS_Datasheet_DBL680en_V1.0 iSMA-B-MIX38_Installation_instruction_DIM408en_v4.4 iSMA-B-MIX18_Installation_instruction_DIM406en_v4.4

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MIX-RS series multiprotocol I/O modules extend the capabilities of building controllers such as MAC36NL, iSMA-B-J8, or AAC20, providing inputs and outputs through serial bus connections. They support open communication protocols like BACnet MS/TP and Modbus RTU/ASCII, making them versatile for both new and existing BMS installations.

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Specification

Model:	iSMA-B-MIX38			iSMA-B-MIX18
Power Supply:	DC: 24 V ± 20%, 1 W; AC: 24 V ± 20%, 3.2 VA			DC: 24 V ± 20%, 3 W; AC: 24 V ± 20%, 4.5 VA
Universal inputs:	8x voltage, current and resistance measurement, dry contact			5x voltage, current and resistance measurement, dry contact
Digital inputs:	12x dry contact input, high-speed pulse counter up to 100 Hz			5x dry contact input, high-speed pulse counter up to 100 Hz
Analog outputs:	6x 0-10 V DC output, maximum load up to 20 mA per channel, 60 mA maximum total load for analog outputs			4x 0-10 V DC output, maximum load up to 20 mA per channel, 60 mA maximum total load for analog outputs
Digital outputs:	12x relay output	Maximum ratings	UL compliant ratings	4x relay output	Maximum ratings	UL compliant ratings
	Resistive load max	3 A @ 230 V AC 3 A @ 30 V DC	3 A @ 24 V AC 3 A @ 30 V DC	Resistive load max	3 A @ 230 V AC 3 A @ 30 V DC	3 A @ 24 V AC 3 A @ 30 V DC
	Inductive load max.	75 VA @ 230 V AC 30 W @ 30 V DC	8 VA @ 24 V AC 30 W @ 30 V DC	Inductive load max.	75 VA @ 230 V AC 30 W @ 30 V DC	8 VA @ 24 V AC 30 W @ 30 V DC
Interface:	RS485 half duplex, Modbus or BACnet, up to 128 devices on the bus
Address:	Set by switch in the range from 0 to 99
Baudrate:	Set by switch in the range from 4800 to 115200 bps
Ingress protection rating:	IP40 - for indoor installation
Temperature:	Operating: -10°C to +50°C (14°F to 122°F) Storage -40°C to +85°C (-40°F to +185°F)
Relative humidity:	5 to 95% RH (without condensation)
Connectors:	Separable, max 2.5 mm2 (18–12 AWG)
Dimensions:	160x110x62 mm (6.30x4.33x2.44 in)			88x110x62 mm (3.46x4.33x2.44 in)
Mounting:	DIN rail mounting (DIN EN 50022 norm)
Housing material:	Plastic, self-extinguishing PC/ABS

Feature

Mix of all I/O types
BACnet MS/TP, BACnet Slave, and Modbus RTU/ASCII, selected with a DIP switch
RS485 communication port, half-duplex
Digital inputs work as fast counters up to 100 Hz
Universal inputs have 16-bit resolution, which increases the accuracy of measurement
Wide range of supported temperature sensors in Celsius and Fahrenheit degrees (NTC, PT1000 etc.)
Automatic detection of a signal type of universal inputs
Digital outputs 230 V AC max. 3 A allow for a direct control without additional relays
Analog outputs with max. 20 mA load per channel (60 mA maximum total load) allow for a direct control of relays (12 V DC) or SSR with PWM support
LEDs indicate the status of inputs and outputs
Simple and fast addressing from 0 to 99 using rotary switches
UL listed
BTL certified