11
Application
The multi-telephone can be used as
part of the Siedle Multi system.
Performance features
•Plug/screw-in terminals for the bus
connection, 4 pairs of conductors
•Call button to the switchboard or
call number 1
•Auto privacy device
•Parallel connection of up to 4
telephones with the same call
number.
•Can be used in systems with
system predecessors HT 740-…,
HT 641-…, HT 642-… and
HT 643-… and with HT 441-… to
HT 443-… This means it is 100%
reverse compatible in configuration
1 to configuration 3.
Electrical voltage
Mounting, installation and
servicing work on electrical
devices may only be performed
by a suitably qualified
electrician.
•DIN standard EN 60065 must be
observed! When making the
electrical connection, the
requirements of VDE 0805 and
EN 60950 must be observed.
•Parallel connection to high-
frequency lines or lines with heavy
interference must be avoided
without fail.
•Please observe planning and
installation guidelines for multi-
systems.
Electrostatic charging
As a result of electrostatic charging,
direct contact with the circuit board
can result in destruction of the
device. Direct contact with the
circuit board must therefore be
avoided.
Scope of supply
HT 840-... consisting of
aHT 840-... (base plate and housing
with circuit board), inscription panel
and insert
bReceiver
cSpiral cable
dOperating instructions for the end
user
eThis product information
Installation
Installation is possible as a parallel
wiring system in any optional form.
For storey distribution boards, we
recommend using side circuit or riser
cable systems.
Avoid using pure star or ring
feeders.
Conductor material
Use twisted-pair shielded cables
JY(St)Y with a cross-section of
0.8 mm as installation material.
Conductors 1 and 2 should
generally be doubled in side circuits.
Range
With a core diameter of 0.8 mm,
the maximum range is 800 to
1000 m.
Power supply
The system telephones aresupplied
by 24 V DC (22-28 V).
The supply voltage at the instrument
must not drop to below 22 V when
under load.
Mounting
The instruments are supplied as
standard for wall mounting. A 55
mm switch box must always be
provided under the system
telephone cable gland to
accommodate terminals and as
stowing space.
Strip the cable back to 80 mm.
1Recommended mounting height
appr. 1.50 m to centre device.
2Open the device from the back by
pressing in the locking lever.
3When mounting directly on the
wall, fasten the base plate using 4
screws, paying attention that the
plate is the right way up (top
marking).
4When mounting on a switch box,
use the screw openings in the
centre of the device, paying
attention that the plate is the right
way up (top marking).
5Install in accordance with the AS
diagram. The cores of the
installation cable must be stored
inside the free installation space in
the base plate.
6Insert the coloured plug of the
spiral cable into the socket at the
housing. A distinct click is audible
when the plug is correctly inserted.
7Insertthe other end of the spiral
cordin the receiver until the plug
audibly clicks into place. This
connection can no longer be
detached.
8Hook the top of the housing into
the base plate and close by exerting
aslight pressure.
9Connect table-top accessorywith
configuration 1
10 Connect table-top accessorywith
configuration 2
11 Connect table-top accessory with
configuration 3
12 Terminal assignment
*Storey call button, customer
** Alarm button/contact,
customer
*** Button/contact, customer
13 Connect the inputs and outputs
14 Comparison
Configuration 1
English
Installation