RHT-CL-EXi sensors are designed to measure temperature and relative humidity in rooms with explosive endangered atmosphere and forwarding of the measured data in the control center where the personal computer installed Application software that via RS485 communication interface receives data from the sensors and presents them, processed and archived in a database.Treatment of the calculated dew point temperature in controlled facilities and establishing compliance with the requirements for ventilation facilities.
Nominal specifications for RHT-CL EXi digital temperature and humidity sensor
| Un | Nominal input voltage | 12 VDC |
| I | Maximum input current | 40 mA |
| Ta | Ambient temperature | -20°C do +40°C |
| Dimensions | Width x Height x Depth | 120 x 80 x 25 mm |
| Li | maximum internal inductance | 0 mH |
| Ci | maximum internal capacity | 0,510 µF |
| Communication | current loop | Micromatic CL protocol |
| Connection | two wires (power and communications) | via a zener barrier type Z715 |
| Category and explosion protection | II 2G Ex ia IIB T5 Gb |
| Mechanical protection | IP20 EN 60529 |
Connecting RHT-CL EXi unit by two wires through a zener barrier type Z715 manufacturer Pepperl + Fuchs following parameters:
- DC version with grounded negative pole
- The nominal resistance of 100 Ω, the minimum series resistance 98 Ω
- Fuse 100mA
- Nominal voltage 15V, 13V operating voltage at 10μA
- Uo=14,7V
- Io=150mA
- Po = 550mW
- Co = 3.86 μF; Magic MH = 6.32; Lo / Ro = 257 μH / Ω
- ATEX Certificate: LOW 01 ATEX 7005-Issue 7
- Designation of protection: II (1) G [Ex ia] IIC
Explosion protection
Explosion protection RHT-CL EXi device was performed in type of protection “Intrinsic safety ia” for the field of use in Category II 2G for gas group IIB, temperature class T5 in accordance with standards: EN 60079-0:2009 and EN 60079-11: 2007
| Type certificate | HREx T11.011 |
| Individual certificates | HREx F 12.002 HREx F 12.007 HREx F 12.011 |
| Declaration of Conformity | 01/2012 02/2012 03/2012 |
| Instructions for safely use | Upute za sigurnu upotrebu |
