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

TTR31, TTR35
9

Technical data

9.1

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).
9.2

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 ('MIN') or ≥ 21.0 mA ('MAX') adjustable
• Switch outputs: in safe state (switch normally open)
9.3

Operating conditions

• Any orientation
• Any position-dependent zero shift can be corrected
Offset: ±20% URL
9.3.1 Environment
• Ambient temperature range: –40...+85 °C (-40...+ 185 °F)
• Storage temperature: –40...+85 °C (-40...+ 185 °F)
1) Guaranteed value for setting 'MAX':
Endress+Hauser
≤ 250 mA
a
≤ 1 mA
a
- 6.5 V) / 0.022 A
≥
21.6 mA
Technical data
1
31