Maintenance and repair Commubox FXA291
22 Endress+Hauser
13 Maintenance and repair
13.1 Cleaning
Remove any dirt on the Commubox with a damp cloth only. Depending on the type of dirt, you
can also dip the cloth in cleaning agent to clean the Commubox.
1. Oily and greasy films:
Use a grease remover, e.g. ethanol or isopropyl alcohol.
2. Lime and metal hydroxide buildup:
Dissolve buildup with diluted hydrochloric acid (3 %). Then rinse the cloth several times
with clear water and wipe again.
3. Buildup containing proteins (e.g. food industry):
Use a mixture of hydrochloric acid (0.5 %) and pepsin (commercially available). Then
rinse the cloth several times with clear water and wipe again.
13.2 Accessories
The following are the most important accessories available at the time this
documentation was issued. For accessories not listed here, please contact your service or
sales office.
ToF adapter FXA291
• Including cable to ToF devices
• Power limitation for connection between FXA291 and input of intrinsically safe ToF M
devices
• Prevents breaching of Ex-approved limit values of ToF devices
• Does not affect the baud rate for digital communication and the installation of software
upgrades for field devices
• Order No. 71007843
13.3 Return
The product must be returned if repairs or a factory calibration are required, or if the wrong
product was ordered or delivered. As an ISO-certified company and also due to legal
regulations, Endress+Hauser is obliged to follow certain procedures when handling any
returned products that have been in contact with medium.
To ensure swift, safe and professional device returns, please read the return procedures and
conditions at www.endress.com/support/return-material.
13.4 Disposal
The device contains electronic components and must therefore be disposed of in accordance
with regulations on the disposal of electronic waste.
Observe the local regulations.
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