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iSMA-B-4U4A-H - 4 universal inputs, 4 analog outputs 0-10VDC
  • iSMA-B-4U4A-H - 4 universal inputs, 4 analog outputs 0-10VDC

iSMA-B-4U4A-H - 4 universal inputs, 4 analog outputs 0-10VDC

  • 4 universal inputs: temperature, analog, digital dry contact, 4 analog outputs 0-10VDC
  • 4 analog outputs 0-10VDC
  • Communication: BACnet MS/TP, Modbus ASCII/RTU

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iSMA-B-MINI-RS - Datasheet

 iSMA-B-MINI-RS - Karta katalogowa

 Multiprotocol I/O Modules Bacnet - Manual

 Multiprotocol I/O Modules Modbus - Manual

Bacnet.png Modbus.png

Multiprotocol I/O Module in a Compact Size with Built-in Light Applications

Powerful I/O module that works as a remote I/O over a serial port with open protocols, BACnet MS/TP and Modbus RTU/ASCII. A compact size and ease of installation allow the module to be fitted even into limited space installations. The module is equipped with HVAC light applications that control the output based on the input measurement.

4 Universal Inputs

Support for over 20 types of temperature sensors and voltage, resistance, current, and dry contact measurements on each universal input.

4 Analog Outputs

0-10 V DC control with 10 mA accuracy, PWM modes, and a maximum load of up to 20 mA to power external relays make the output suitable for a variety of scenarios.

Manual Override Switches

Each analog output can be manually overdriven using a dedicated manual potentiometer.

Simplified Configuration and Commissioning Process

The module allows for seamless configuration over BACnet, Modbus, or dedicated free of charge tool. The ability to be powered from a USB port facilitates local testing and a straightforward updating process, and the high-end RS485 transceiver allows up to 128 devices to communicate reliably with the client on a single bus.

Quality and Reliability Confirmed by Certificates

iSMA CONTROLLI is a long-standing member of the BACnet community. The experience in developing high quality products and the BTL (BACnet Test Laboratory) certification confirms the excellent performance of communication using the BACnet protocol.



  • RS485 interface
  • miniUSB type B interface
  • Status LED indicator
  • DIN rail mounted
  • 4 universal inputs, dry contact inputs
  • 4 analog outputs 0-10VDC


  • 4 universal inputs:
    - temperate: 10K3A1, 10K4A1, Carel 10K, 20K6A1, 2.2K3A1, 3K3A1, 30K6A1, SIE1, TAC1, SAT1, Pt1000, Ni1000 0C, Ni 1000 20C, Ni1000 LG
    - resistive: 0-1000 kΩ
    - voltage: 0-10 VDC
    - current: 0-20mA
    - digital: dry contact


  • 4 analog outputs 0-10VDC
  • accuracy 10mA
  • maximum load up to 20 mA
  • PWM: 0.01 Hz, 0.1 Hz, 1 Hz, 10 Hz, 100 Hz


  • BACnet MS/TP
  • Modbus RTU/ASCII
  • Free software iSMA Configurator
  • Dedicated Niagara Framework modules


  • 24 V DC ± 20%
  • 24 V AC ± 20%

Product Details


Specific References

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