Technical data

The most important technical data TTR31, TTR35
32 Endress+Hauser
9. 2 Output
Switching capacity
• Switch status ON: I
a
≤ 250 mA
• Switch status OFF: I
a
≤ 1 mA
• 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
- 6.5 V) / 0.022 A
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)
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)
9.3.2 Process
Process temperature limits
• -50 to 150 °C (-58 to 302 °F) generally,
• -50 to 200 °C (-58 to 392 °F) version TTR35 with neck
"
Caution!
Restrictions depending on process connection and ambient temperature:
• No restriction with coupling (see Accessories, → Chap. 7.2.1, → Chap. 7.2.4, order no.
51004751, 51004753) and neck tube length min. 20 mm (0.79").
• with process connection:
max. ambient temperature max. process temperature
up to 25 °C (77 °F) no restriction
up to 40 °C (104 °F) 135 °C (275 °F)