Overvoltage Protection - Endress+Hauser Levelflex FMP55 Operating Instructions Manual

Levelflex FMP55 PROFIBUS PA
3) This range applies if the option JN "Transmitter ambient temperature" –50 °C (–58 °F) was selected in feature 580 "Test, Certificate". If the
temperature is permanently below –40 °C (–40 °F), higher failure rates can be expected.
Endress+Hauser
• Connecting cable:
• Cable supplied with device up to 30 m (98 ft)
• Standard cable supplied by customer up to 60 m (196 ft)
• Ambient temperature:–40 to 80 °C (–40 to 176 °F)
• Ambient temperature (option): –50 to 80 °C (–58 to 176 °F)
Ordering information
• If the remote display is to be used, the device version "Prepared for display FHX50" must
be ordered.
For the FHX50, the option "Prepared for display FHX50" must be selected under
"Measuring device version".
• If a measuring device has not been ordered with the version "Prepared for display FHX50"
and is to be retrofitted with an FHX50, the version "Not prepared for display FHX50"
must be ordered for the FHX50 under "Measuring device version". In this case, a retrofit
kit for the device is supplied with the FHX50. The kit can be used to prepare the device
so that the FHX50 can be used.
Use of the FHX50 may be restricted for transmitters with an approval. A device may
only be retrofitted with the FHX50 if the option "Prepared for FHX50" is listed in the
associated Safety Instructions (XA) under Basic specifications, "Display, operation".
Also pay attention to the Safety Instructions (XA) of the FHX50.
Retrofitting is not possible on transmitters with:
• An approval for use in areas with flammable dust (dust ignition-proof approval)
• Type of protection Ex nA
For details, see the "Special Documentation" SD01007F
15.1.5

Overvoltage protection

The surge arrester for loop-powered devices can be ordered together with the device via
the "Accessory mounted" section of the product order structure.
The surge arrester can be used for loop-powered devices.
• 1-channel devices - OVP10
• 2-channel devices - OVP20
Technical data
• Resistance per channel: 2 × 0.5 Ω
• Threshold DC voltage: 400 to 700 V
• Threshold surge voltage: < 800 V
max
Accessories
3)
A0021734
83