Technical data

TTR31, TTR35 The most important technical data
Endress+Hauser 31
8. 4 Software history and compatibility overview
The release number on the nameplate and in the Operating Instructions indicates the change
status of the device: XX.YY.ZZ (example 01.02.01).
Software history
9 The most important 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).
XX Change in the main version.
Compatibility no longer provided. Device and Operating Instructions change.
YY Change in functionality and operation.
Compatibility provided. Operating Instructions change.
ZZ Trouble-shooting and internal modifications.
Operating Instructions do not change.
Date Release no.
device
Changes in software Documentation
06.2004 01.00.00 KA174r/09/en
(51008032)
12.2004 01.01.00 New analog electronics BA201r/09/en/02.05
(51009833)
02.2005 01.02.00 Internal BA201r/09/en/02.05
(51009833)
02.2006 01.02.01 Parameter functional safety for the optional
analog output is not applicable
BA229r/09/en/03.06
(71025405)