Electrical Connection; Electrical Safety; Connection Conditions; Required Tools - Endress+Hauser Proline Cubemass C 100 PROFIBUS DP Operating Instructions Manual

Proline Cubemass C 100 PROFIBUS DP
Endress+Hauser
7

Electrical connection

NOTICE
The measuring device does not have an internal circuit breaker.
‣
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.
‣
Although the measuring device is equipped with a fuse, additional overcurrent
protection (maximum 16 A) should be integrated into the system installation.
7.1

Electrical safety

In accordance with applicable federal/national regulations.
7.2

Connection conditions

7.2.1

Required tools

• For cable entries: Use corresponding tools
• For securing clamp (on aluminum housing): Allen screw3 mm
• For securing screw (for stainless steel housing): open-ended wrench 8 mm
• Wire stripper
• When using stranded cables: crimper for wire end ferrule
7.2.2

Requirements for connecting cable

The connecting cables provided by the customer must fulfill the following requirements.
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 (incl. conductor for the inner ground terminal)
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
Characteristic impedance
Cable capacitance
Wire cross-section
Cable type
Loop resistance
A
135 to 165 Ω at a measuring frequency of 3 to 20 MHz
< 30 pF/m
> 0.34 mm 2 (22 AWG)
Twisted pairs
≤110 Ω/km
Electrical connection
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