2726188 Phoenix Contact, 2726188 Datasheet - Page 165

• Manufacturer Part Number: 2726188
• Description: INTERBUS Bus Coupler
• Manufacturer: Phoenix Contact

C Explanation of abbreviations and symbols
Ground
FE
PE
GND
U
U
6452_en_02
BK
M
C 1
Ground, general symbol
Functional earth ground
Noiseless ground
This ground is free from external noise voltage, and is used to ground cable shields and to
suppress noise and interference voltages.
Functional earth ground is a low-impedance current path between circuits and ground. It is
not designed as a safety measure but rather, for example, for the improvement of noise
immunity (EN 61131).
This ground connection must be separated from parts with hazardous voltage by means of
double or reinforced insulation (EN 60950).
Protective earth ground
This ground is used to ground devices. It also provides shock protection for people.
Protective earth ground is a low-impedance current path that minimizes the risk to the user
in the event of an error (EN 61131).
0 V ground; housing or chassis
In this user manual the term ground refers to common voltage return lines. Ground is
electrically isolated from FE and PE. If a jumper is placed between ground and FE or PE,
this isolation is removed.
Various additions to GND (such as F-GND, BC-GND, etc.) indicate separate potentials.
Bus coupler supply
The voltage U
unit, the communications power U
voltage U
Main supply (I/O supply in the main circuit)
The voltage U
The voltage U
potential jumper to the next power terminal. (Exception: terminal with a relay output
interrupts the potential jumper)
BK
Explanation of abbreviations
.
BK
M
M
supplies all of the devices connected to the main circuit.
is supplied using a bus coupler or a power terminal and is led through the
is used to supply the bus coupler power supply unit. In the power supply
L
and the analog voltage U
ANA
are generated from the
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C-1