Power repeater / power supply according to IEC 61158-2
FOUNDATION FieldbusPower supply, connections and operating
Subject to reasonable modifications due to technical advances.
Copyright Fuchs, Printed in Germany
Fuchs Group • Tel.: Germany (06 21) 7 76-0 • USA (330) 4 25 35 55 • Singapore 7 79 90 91 • Internet http://www.pepperl-fuchs.com
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7.6
Meaning of the LED
7.6.1
LEDs of the power repeaters
Power repeaters make the following LEDs available:
7.6.2
LEDs of the power supplies
The field bus power supplies offer the following LEDs:
7.7
Grounding
Shielded cables are normally used for the field bus transmission leads. For reasons
of electromagnetic compatibility (EMC), the shield of this transmission line must be
grounded. There are 3 ways this can be done:
1. Hard grounding on both ends of the field bus transmission line and on each field
bus instrument. This requires laying a potential equalization line.
2. Hard grounding on all field devices, capacitive grounding on the power repeater/on
the current supply, separated potential equalization lines for the field and host side
(only if required). Different companies offer terminals with an integrated capacitor
(for example Phoenix Contact, Wago, ...).
3. Hard grounding on the power repeater/on the power supply, capacitive grounding
on all field devices.
The best EMC protection will be achieved with Version 1, the worst with Version 3.
The following illustrations are examples of grounding on a power repeater with intrin-
sically safe interface.
Table 4: LEDs of the power repeaters
LED
Color
Status/function
PWR
Green
On, power supply voltage present
COM/ERR
Red
Off: Communication OK
On, flashing at 2 Hz: Communication error,
no activity on the field side
(timeout 3 s)
On continuously: Hardware error
Table 5: LEDs of the field bus power supplies
LED
Color
Status/function
PWR
Green
On, power supply voltage present
