The Most Important Technical Data; Power Supply; Output; Operating Conditions - Endress+Hauser Thermophant T TTR31 Operating Manual

The most important technical data

8 The most important technical data

8. 1 Power supply

Supply voltage
• DC voltage version 12...30 V DC
Current consumption
• Without load < 60 mA, 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 IEC 61000-4-5). If the supply
voltage is exceeded, the properties specified are no longer guaranteed.
• 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).

8. 2 Output

Switching capacity
• Switch status ON: I
• Switch status OFF: I
• Switching cycles: > 10,000,000
• Voltage drop PNP: ≤ 2 V
• Overload protection
Automatic load testing of switching current; output is switched off in case of overcurrent, the
switching current is tested again every 0.5 s; max. capacitance load: 14 μF for max. supply
voltage (without resistive load).
Load (analog output)
• Max. (V
supply
Signal on alarm
• Analog output: ≤ 3.6 mA or ≥ 21.0 mA adjustable
(if setting ≥ 21.0 mA the output is ≥ 21.5 mA)
• Switch outputs: in safe state (switch normally open)

8. 3 Operating conditions

• Any orientation
• Any position-dependent zero shift can be corrected
Offset: ±20 % URL
Operating conditions: Environment
• Ambient temperature range
–40...+85 °C (-40...+ 185 °F)
• Storage temperature
–40...+85 °C (-40...+ 185 °F)
28
≤ 250 mA
a
≤ 1 mA
a
- 6.5 V) / 0.022 A
TTR31, TTR35
Endress+Hauser