Endress+Hauser Proline Promag H 500, Руководство по эксплуатации

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Proline Promag H 500 PROFIBUS DP Electrical connection
Hauser 35
7 Electrical connection
NOTICE
The measuring device does not have an internal circuit breaker.
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For this reason, assign the measuring device a switch or power-circuit breaker so that
the power supply line can be easily disconnected from the mains.
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Although the measuring device is equipped with a fuse, additional overcurrent
protection (maximum 10 A) should be integrated into the system installation.
7.1 Connection conditions
7.1.1 Required tools
• For cable entries: Use corresponding tools
• For securing clamp: Allen key 3 mm
• Wire stripper
• When using stranded cables: crimper for wire end ferrule
• For removing cables from terminal: Flat blade screwdriver ≤ 3 mm (0.12 in)
7.1.2 Requirements for connecting cable
The connecting cables provided by the customer must fulfill the following requirements.
Electrical safety
In accordance with applicable federal/national regulations.
Protective ground cable
Cable ≥2.08 mm 2 (14 AWG)
The grounding impedance must be less than 1 Ω.
Permitted temperature range
• The installation guidelines that apply in the country of installation must be observed.
• The cables must be suitable for the minimum and maximum temperatures to be
expected.
Power supply cable
Standard installation cable is sufficient.
Signal cable
PROFIBUS DP
The IEC 61158 standard specifies two types of cable (A and B) for the bus line which can
be used for every transmission rate. Cable type A is recommended.
Cable type A
Characteristic impedance 135 to 165 Ω at a measuring frequency of 3 to 20 MHz
Cable capacitance < 30 pF/m
Wire cross-section
> 0.34 mm 2 (22 AWG)
Cable type Twisted pairs
Loop resistance ≤110 Ω/km