33
EE33 Humidity / Temperature Sensor for High Humidity and Chemical Applications
Sensor failure
No supply voltage
Check wiring and supply voltage
Only green LED is illuminated continuously electronics defect
contact the manufacturer
High humidity values - red LED blinks
Dew (condensation) in the sensor probe head
heat the measurement cell and check the mounting of sensor probe
Incorrect filter type (e.g. storage of humidity after stainless steel sintered filter condensation)
Filter type should match the application
11 Network
EE33 sensors with option J3 can be connected in an RS485 bus system EE industry protocol.
Network configuration example:
1)
1) Please note: to enable optimum expansion, both ends of the network shall be terminated with a terminating resistor with
Ra=100 Ω.
Technical Data:
Max. network size: 32 sensors
Max. network expansion: 1 200m (3 937ft) total length
Transmission rate: 9 600 Baud
Mounting notes:
Data cables:
- external diameter < 4 mm (0.16")
- 2-core twisted pair
- Typ. 50 pF/m, impedance 100 Ω, non-shielded
- In accordance with the RS485 standard, cables in category 5 (UTP), specified according to
EIA/TIA/ANSI 568, meet these requirements.
For high noise emissions, especially for large cable lengths, the use of shielded cables is recommended
(Shield laid at GND Ser).
Plug connectors:
To achieve a more flexible network configuration, the sensors should be equipped with plug connectors.
(Option E7)
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