Siemens SITRANS FM MAG 3100 Operating Instructions Manual page 44

Connecting
5.1 General safety requirements
Terminal box
Before opening the terminal box check that:
• No explosion hazard exists
• All connection leads are potential free
Grounding
The mains protective earth wire must be connected to the PE terminal in accordance with the
diagram (class 1 power supply)
Mechanical counters
When mounting a mechanical counter to terminals 57 and 58 (active output), a 1000 µF
capacitor must be connected to terminals 56 and 58. Capacitor + is connected to terminal 56
and capacitor - to terminal 58.
Output cables
If long cables are used in electrically noisy environments, it is recommended to use screened
cables.
Electrode cables
Dotted connections are only to be made when using special electrode cables.
National requirements
Observe country-specific installation directives for field wiring.
Cable specifications
• Only use cables with at least the same degree of protection as the sensor to install the sensor.
• The line length from the cable gland to the terminals must be kept as short as possible. Line
loops in the terminal box must be avoided.
• To guarantee the IP67 degree of protection, use cables with the required specifications.
44
WARNING
WARNING
WARNING
WARNING
Protective conductor terminal
The required cable is min. AGW16 or 1.5 mm
WARNING
Wire insulation
For field wiring installation: Ensure that the national requirements of the country in which
the flowmeters are installed is met.
Cu.
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Operating Instructions, 12/2021, A5E03005599-AE
SITRANS FM MAG 3100