Power Supply

Voltage

24 V AC/DC ± 20%

Power Consumption

iSMA-B-LP(-1): 0.5 W (24 V DC), 0.75 VA (24 V AC)

iSMA-B-LP-H(-1): 0.5 W (24 V DC), 0.75 VA (24 V AC)

iSMA-B-LP-C(-1): 0.7 W (24 V DC), 1 VA (24 V AC)

iSMA-B-LP-HC(-1): 0.7 W (24 V DC), 1 VA (24 V AC)

Built-in Sensors

Temperature Sensor

10k NTC type

Accuracy: ±0.5˚C

Range: 0-50˚C

Resolution: ±0.1˚C

Humidity Sensor

Range: 0-100% RH

Accuracy: ±2% RH in range 20-80% RH

Resolution: ±1% RH

CO2 Sensor

Method Non Dispersive Infrared (NDIR), gold plated optics, diffusion sampling (with Telaire’s Patented ABC Logic Self Calibrated Algorithm)

Range: 400-2000 ppm

Accuracy: ±30 ppm OR ±3% of reading

Stability: < 2% of FS over life of sensor (15 years typical)

Warm-up Time : < 2 minutes (operational);

10 minutes (maximum accuracy)

Calibration: ABC Logic Algorithm

Manual Calibration Interval: Not required

RS485 Interface

Communication Protocols

Modbus RTU, Modbus ASCII, BACnet MS/TP

Baud rate

From 4800 to 115200 bps

USB

USB

Mini USB, type B

Environment

Ingress Protection

IP40

Temperature

Storage

-40˚C to +85˚C

Operating

0˚C to +50˚C

Humidity

Relative

5% to 95%

Platform


ARM Cortex - M0+

Housing


Construction: plastic, self-extinguishing (PC/ABS)

Wall mounting (standard electric box)

Cooling: internal air circulation  

Dimensions

Width

100 mm

Length

27 mm

Height

123 mm

Technical specification