2726188 Phoenix Contact, 2726188 Datasheet - Page 87

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

Diagnostics
6452_en_02
8.1.3
Figure 8-1
The following states can be read on power and segment terminals:
Power terminal
UM (1)
Segment terminal
US (1)
Power terminal with fuse and diagnostics/
segment terminal with electronic fuse
D (3)
Also on terminals with fuse
E (2)
On terminals with fuses, the green UM or US LED indicates that the main or segment
voltage is present on the line side of the fuse, meaning that if the green LED is on, there
is voltage on the line side of the fuse. If the red E LED is also on, the fuse has blown or
is missing and no voltage is applied after the fuse.
If the red E LED is on and the green D LED is flashing at 2 Hz on terminals with fuse and
diagnostics, there is no voltage present after the fuse.
Thus, a blown fuse is indicated by both diagnostic indicators (E and D).
UM
PWR IN
PWR IN
Green LED
Green LED
Green LED
Red LED
ON:
OFF:
Indicators on power and segment terminals
1
Possible indicators on power and segment terminals
US
SEG
Supply voltage in the main circuit (for meaning see page 8-2)
Supply voltage in the segment circuit (for meaning see
page 8-2)
Diagnostics (for meaning see page 8-2)
Fuse status
Fuse not present or blown
Fuse OK
1
US
E
SEG/F
Diagnostic and status indicators
1
2
PHOENIX CONTACT
SEG-ELF
E
D
3
2
6452C029
8-3