Endress+Hauser Flowphant T DTT31 - Basic Safety Instructions; Personnel, Designated Use, and Workplace Safety; Operational Safety and Hazardous Area Limitations

DTT31, DTT35
6 Endress+Hauser
• DC voltage version with valve connector M16x1.5 or NPT ½"
P01-PTx3xxxx-04-xx-xx-xx-003
Supply voltage DC voltage version
18 up to 30 V DC (reverse polarity protection)
Current consumption < 100 mA (without load) at 24 V DC, max. 150 mA (without load); with reverse polarity protection
Power supply failure • Behaviour in case of overvoltage (> 30 V)
The device works continuously up to 34 V DC without any damage.
No damage is caused to the device in case of a short-term overvoltage up to 1 kV (as per EN 61000-4-5).
The specific properties are no longer guaranteed if the supply voltage is exceeded.
• Behaviour in case of undervoltage
If the supply voltage drops below the minimum value, the device switches off (status as if not supplied with
power = switch open).
Performance characteristics
The percentage information in the "Performance characteristics" section refers to the full scale value or the set
maximum value (100% value) of the monitoring range.
Reference operating
conditions
As per DIN IEC 60770 or DIN IEC 61003
T = 25 °C ± 5 °C (77 °F ± 9 °F), relative humidity 45 to 75 %, ambient air pressure 860 to 1060 kPa
(124 to 153 PSI), water test medium. Supply voltage U = 24 V DC.
Maximum measured error Flow
The device records fluid velocity relatively in relation to a set monitoring range of the flow (0 to 100 % as
display value). An absolute measurement of the fluid velocity or the mass flow is not possible. The sensitivity
of the calorimetric flow sensor changes with the fluid velocity. It increases with decreasing fluid velocity (for
example, with water, the greatest sensor sensitivity is recorded in the range from 0.03 to 0.5 m/s).
Item No. Output setting Order code (see Ordering information section)
B 1x PNP switch output DTT3x-A2A*******; DTT3x-A3A*******