Com Loop - Panasonic EBL128 Planning Instructions

Panasonic Electric Works Nordic AB
MEW01090 Rev: 3
4.1
The FBP is used by the fire brigade personnel to see which alarm
point / zone having activated the fire alarm(s), silence alarm devices,
reset alarms, etc. In the display (LCD, 2x40 alphanumeric characters),
the information displayed on the first row is depending on how many
alarm points / zones having activated fire alarm, convention and
language.
On the second row is, for the activated alarm point / zone, an alarm
text shown, if programmed. For more detailed information regarding
the display information, see the EBL128 Operating instructions.
Required fire brigade personnel manoeuvres are performed via the
FBP in EBL128 or via an external FBP 1826 / 1828.
Instead of external FBPs 1826 / 1828, German Fire Brigade Control
Panels (Feuerwehr-Bedienfeld) FBF 2003 and/or German Fire
Brigade Indicator Panels (Feuerwehr-Anzeigetableau) FAT 2002 can
be used.
The CP is used by the EBL128 owner, service personnel, etc. to
"communicate" with EBL128, e.g. for monthly tests, disablements
commissioning, maintenance and service. Access codes for different
access levels are required. A keypad is used to get access to the menu
tree, i.e. main and sub menus for data input / output, manoeuvres, etc.
The CP also holds several system status LEDs.

COM loop

EBL128 has one COM loop (0), to which the loop units are connected.
Connections to "J1:1-4" according to drawing 128-21. On the COM
loop can theoretically 127 COM loop units be connected (i.e. address
1-127). The exact number of addresses that can be used and the cable
length are depending on the cable type (cable resistance) and the total
COM loop unit current consumption (i.e. the type and number of loop
units). See chapter "Current consumption", page 134 and drawing
128-11. Each COM loop unit has a technical address and each alarm
point and zone line input has a presentation number (zone-address).
See the EBL128 Operating Instructions for more information.
If one or more addressable Short Circuit Isolators (SCI 4313 / 4370)
are used, the loop will be divided into "segments", i.e. the part
between two isolators or between EBL128 and one isolator. In case of
short-circuit on the COM loop only the affected segment will be
isolated, which will minimise the number of units "disabled". See
Figure 9, page 43.
Break (cut-off) or short circuit on the COM loop
Normally EBL128 communicates with the units in the A-direction
only and is in the B-direction checking the COM loop voltage only,
which shall be > 12 V DC. There can be no one, one or up to eight
addressable Short Circuit Isolators, 4313 / 4370 (SCI), connected on
the COM loop.
EBL128 Planning Instructions V1.1.x
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