2726188 Phoenix Contact, 2726188 Datasheet - Page 106

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

IL SYS INST UM E
9-10
PHOENIX CONTACT
9.4.2
Protective earth ground is a low-impedance current path that minimizes the risk to the
operator in the event of an error (including a high voltage and/or current error between an
electrical circuit and ground).
In Inline terminals, protective earth ground is used outside the SELV.
The PE (protective earth ground) potential jumper is led from the power terminal of the
120 V AC or 230 V AC area through this entire area to the next power terminal.
Power-level terminals are connected to PE using the power connector and voltage
continuation between power-level terminals is ensured using the power bridge.
Figure 9-9
WARNING: Disregarding this warning may result in the loss of electrical safety
Every power terminal of the 120 V AC or 230 V AC area must be connected to the DIN rail
with low impedance, otherwise no protection is provided.
Figure 9-9 shows the additional grounding and protective earth ground connection using
the example of the IL PB BK DI8 DO4-PAC bus coupler. Connect the additional
grounding and protective earth ground to your devices according to the terminal-specific
documentation.
Protective earth ground (PE) (Inline Modular IO)
Additional grounding of a bus coupler and protective earth ground
connection
(Example: IL PB BK DI8 DO4-PAC)
P W R
U L
U S
U M
B F
F S
F N
O 1
D
1
3
E
2
4
I1
1
3
2
4
I2
5
6
7
8
1 2
D I
8
D
1 2
1 2
1 2
L
1 2
0 P
W R
IN
1 2
1
0 D
D
I1
6452C014
1
1 2
0 D
D
I1
D O
1 A
1
C
D
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