ESU 101
Environmental Sensor Unit

ESU 101 is s cost-effective environmental sensor which is also equipped with Infra Red (IR) controller
for split-type Air Conditioners. Thanks to its flexible design, ESU 101 has a learning mode which enables the device to be used with almost all split-type ACs. It has an RS-485 interface supporting Modbus/RTU protocol for SCADA applications.

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Device Specifications
Supply Voltage Range9-18/18-36 Vac or 85 – 264 Via
Nominal Supply Voltage12 / 24 Vac or230 Vne
CPUARM Cortex-M4 32 Bit 180 Mhz
Flash256 kB
RAM128 kB
Watchdog TimerSystem Reset / 5 sec
Power Consumption0.46W 230Vne
Internal Temperature SensorTemperature Range: -20 to 120 °C
Internal Humidity SensorHumidity Range: 0 to 100% RH
Infrared Transmitter Output Power160mW
Infrared Transmitter Output Wavelength940nm
Infrared Transmitter Carrier Frequency38kHz
Infrared Receiver Input Frequency38kHz
Relay Output Contact Current Rating10A
Relay Output Maximum Switching Voltage250VAC
Relay Contact FormSPOT (1 Form C)
Wi-Fi Specifications
WI-Fl Protocols802.11 b/g/n
Frequency Range2.4 GHz – 2.5 GHz (2400M – 2483.5M)
RF CertificationSRRC, FCC, CE (RED), IC, NCC, KCC, TELEC (MIC)
Wi-Fi CertificationWi-Fi Alliance
Wi-Fi ModeStation / SoftAP / SoftAP + Station
SecurityWPA / WPA2
Network ProtocolsIPv4,TCP / UDP / HTTP / FTP
Communication Specifications
Communication ProtocolsModbus-RTU (Slave)
Serial Interfaces1 x RS-485, Micro USB C Type 2.0
R5-485 BaudRate1200bps – 115200bps
USA Data Transfer Speed480 Mbit/s
Environment Conditions
StandardsIEC 61326-1, EN 301489-1, IEC 61010-1, EN 60950-1
Operating Temperature-25°C / +70°C
Storage Temperature-40°C / +70°C
Operating HumIdty25% – 95% RH
Protection ClassIP20
Mechanical Specifications
Device Dimensions (W x H x 0)115mm x 83mm x 32 mm
Weight100gr
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