SARB Networkable IAQ Room Sensors
Specification and Installation Instructions
SARB-161128-ESA.docx
Page | 1
Models
Models
Temp RH CO2 VOC Networkable*
SARB24TH
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SARB24TG
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SARB24TV
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SARB24TGH
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SARB24TGVH
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* Networkable: BACnet MS/TP or Modbus (selectable via menu)
Features
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Inputs and outputs
o
One analog input (AI1)
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One binary input (BI1)
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Two analog outputs (2 AO), commandable via network
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Two binary outputs (2 BO), commandable via network
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Enthalpy and dew point calculations (available via network)
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Display or hide all the required access for user interaction
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Backlit LCD with simple icon and text-driven menus
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Selectable Fahrenheit or Celsius scale
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BACnet® MS/TP or Modbus (selectable via menu)
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Select MAC address via menu or via network
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Automatic baud rate detection
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Network service port via on-board mini USB connector
SARB Series
Technical Specifications
Description
SARB Series
Temperature Sensor
Sensor range
-40ºC to 125ºC [-40ºF to 257ºF]
Display resolution
±0.1ºC [0.2ºF]
Humidity Sensor (SARB24TH, SARB24TGH and SARB24TGVH)
Sensor range
5 to 95% RH
Display resolution
0.1% RH
CO
2
Sensor (SARB24TG, SARB24TGH and SARB24TGVH)
Operating principle
Self-calibrating, Non-Dispersive Infrared (NDIR)
Sensor range
400 to 2000 ppm
Accuracy
±30 ppm ±3% of reading (Accuracy is defined after minimum 3 weeks of continuous operation)
Response time
2 minutes by 90%
VOC Sensor (SARB24TV and SARB24TGVH)
Operating principle
Self-calibrating, Non-Dispersive Infrared (NDIR)
Sensor range
0-1000 ppb isobutylene equivalent tVOCs
Response time
< 5 seconds for tVOC
Start up time
15 minutes
Other
Inputs
1 Analog input: 0-10Vdc or Thermistor (10k Type 3)
1 Binary input: digital input (dry contact)
Outputs
2 Binary outputs (BO1 and BO2), dry contracts 24Vac, 1A max 3A in-rush
2 Analog outputs (0 to 10Vdc)
BACnet
BACnet
®
MS/TP @ 9600, 19200, 38400, 57600 or 76800 bps (B-ASC)
Modbus
Modbus RTU slave @ 9600, 19200, 38400 or 57600. Selectable parity and stop bit configuration:
No parity, 2 stop bit | Even parity, 1 stop bit | Odd parity, 1 stop bit
Communication Connections 24 AWG twisted-shield cable (Belden 9841 or equivalent)
Electrical connection
0.8 mm
2
[18 AWG] minimum
Operating temperature
0ºC to 50ºC [32ºF to 122ºF]
Storage temperature
-30ºC to 50ºC [-22ºF to 122ºF]
Relative humidity
5 to 95 % non-condensing
