iSMA-B-4U4O-H Module Specifications

Introducing the powerful iSMA-B-4U4O-H specifications, a remote I/O module designed to operate over a serial port using open protocols such as Modbus BACnet control module, BACnet MS/TP, and Modbus RTU/ASCII. Its compact size and straightforward installation make it suitable for even the most limited space installations. This versatile module features built-in HVAC and light applications that intelligently control output based on input measurements.

The module includes 4 universal inputs, supporting over 20 types of temperature sensors along with voltage, resistance, current, and dry contact measurements on each input.

In addition, it boasts 4 digital outputs equipped with normally open 3 A relays, allowing for direct control without the need for additional relays.

Each output is fitted with manual override switches, enabling easy manual control through dedicated hand operating switches.

Built-in HVAC and light applications come with configurable algorithms, making this module not only a great addition to existing systems but also an effective standalone controller.

**Hardware Specifications**

- RS485 interface

- Mini USB type B interface

- Status LED indicators

- DIN rail mounted

- 8 I/Os onboard

**Inputs**

- 4 Universal Inputs (UI)

- Temperature input in Celsius degrees: 10K3A1, 10K4A1, Carel 10K, 20K6A1, 2.2K3A1, 3K3A1, 30K6A1, SIE1, TAC1, SAT1, Pt1000, Ni1000 0C, Ni 1000 20C, Ni1000 LG 2

- Temperature input in Fahrenheit degrees: 10K Type2, 10K type3, 20K, 3K, PT 1000, Ni 1000 32F, Ni 1000 70F

- Resistive input: 0-1000 kΩ

- Voltage input: 0-10 V DC

- Current input: 0-20 mA

- Dry contact input

**Outputs**

- 4 Digital Outputs (DO)

- NO relay output

- Resistive load max. 3 A @ 230 V AC / 30 V DC

- Inductive load max. 75 VA @ 230 V AC / 30 W @ 30 V DC

**Communication**

- BACnet MS/TP

- Modbus RTU/ASCII

- Free software iSMA Configurator

- Dedicated Niagara Framework modules

**Power Supply**

- 24 V DC ± 20%

- 24 V AC ± 20%