Connection Lines Between Control Unit And External Operating Units; Power Supply (24V) - Siemens FC700A System Planning Manual

Control terminal B3Q700 (FC/FT)
12.5 Connection lines between control unit and external operating
units
Application
24V supply from
control unit
EN54 complied with
24V supply from
control unit without
emergency operation
and emergency
power supply
12.6

Power supply (24V)

30
Siemens Building Technologies
Fire & Security Products
2...11
leads
max. 1000m per loop with ∅0,6mm G51 (incl. return line)
max. 1400m per loop with ∅0,8mm G51 (incl. return line)
When planning a system the following condition must be complied with:
At least one operating unit must comply with standard EN54, i.e. it must be
equipped with emergency operation and emergency power supply.
EN54 requirements:
Communication as loop line -> design C-Bus as a loop line
Operating units also with emergency operation -> 3 additional wires
Second de-coupled 24V supply -> 3 additional wires or autonomous power
supply
The number of wires in the connection cable depends on the application and the
distances between the stations:
C-Bus 24V supply
(2 wires) (3 wires)
(2 wires) (3 wires)
Note:
Emergency operation circuit required including between CPUs or for a sepa-
–
rately connected Gateway
Emergency operation circuit and emergency supply are not designed as a loop
–
line
Emergency supply via separate cable or C-Bus feedback
–
Operating unit B3Q700 is designed for the voltage range 18...45VDC
The maximum current at 24V is 400mA
Max. Length of line (approximate):
For cables ø 0.8mm -> 180m
–
For cable cross-section 1mm
–
The current consumption for the options (parallel indicator panel, LON-module)
must be taken into account separately
Control terminal FT700A
Options
B3R051 (Parallel indicator panel)
E3I040 (LON module)
Printer
Loop C-Bus
Control unit FC700A
Emergency power
supply
(3 wires)
2
-> 360m
Control terminal
FT700A
Emergency opera-
Number of wires
tion circuit
(3 wires)
007836_a_en_--.doc
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5
03.2004