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Power supply (24v), 6 power supply (24v), Control unit fc700a – Siemens FC700A User Manual

Page 30

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Control terminal B3Q700 (FC/FT)

30

Siemens Building Technologies

007836_a_en_--.doc

Fire & Security Products

03.2004


12.5 Connection lines between control unit and external operating

units











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:

Application C-Bus

24V

supply

Emergency power

supply

Emergency opera-

tion circuit

Number of wires

24V supply from
control unit
EN54 complied with

(2 wires)

(3 wires)

(3 wires)

(3 wires)

11

24V supply from
control unit without
emergency operation
and emergency
power supply

(2 wires)

(3 wires)

5

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

12.6 Power supply (24V)

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

2

-> 360m

The current consumption for the options (parallel indicator panel, LON-module)
must be taken into account separately

Control unit FC700A

Options

Control terminal FT700A

2…11
leads

Loop C-Bus

max. 1000m per loop with 0,6mm G51 (incl. return line)
max. 1400m per loop with
0,8mm G51 (incl. return line)

Control terminal
FT700A

B3R051 (Parallel indicator panel)
E3I040 (LON module)
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