Comelit Group MT SB2 03 Technisches Handbuch Seite 27

Rule for connecting several monitors with the same user code
4897
L1 L2 L3 L4
Secondary monitor
Calculating the number of devices for Simplebus1 or door
entry phone systems.
Starting from the assumption that the MAX number of telephones
2408W/A inserted in the same external supplying unit is 100, the
following table is used to calculated the number of elements which
can be installed.
The TOTAL must be less than or equal to 100 for every
external supplying unit.
Note that only the devices inserted on the riser and not those
connected to the intercom network are counted in the table.
Table for calculating the equivalent telephones for Simplebus1
or door entry phone systems.
Article N° devices
inserted on
the riser
2408W/A
2410W/2A
2418W
on the riser
2418W on the
intercom network
2428W/A
1256
1224
4897
4833/A
4714W/2 - 5714
4714W/2I - 5714/I
1998
Secondary monitor
1
2
3
4 Main monitor
5
6
supplied from riser
Multiplier Equivalent
N°
telephones
X 1 =
X 2 =
X 2 =
X 0 =
X 1 =
X 4 =
X 5 =
X 4 + 6 =
X 4 =
X 1 =
X 0 =
X 10 =
TOTAL =
1
2
3
4
5
6
When the TOTAL equivalent telephones is more than 100, use
additional power supply Art. 1236.
E.G.: door entry phone system with part of extensions
intercommunicating, 2 external units, 3 bell repeaters.
Article N° devices
inserted
2408W/A 20
2410W/2A
2418W 10
on the riser
2418W on the 20
intercom network
2428W/A
1256 3
1224 1
4897 6
4833/A
4714W/2 - 5714
4714W/2I - 5714/I
1998
MT SB2 03
1212/B
Main monitor
supplied separately
1
2
3
4
5
6
Multiplier Equivalent
N°
telephones
X 1 =20
X 2 =0
X 2 =20
X 0 =0
X 1 =0
X 4 =12
X 5 =5
X 4 + 6 6 x 4 + 6=30
X 4 =0
X 1 =0
X 0 =0
X 10 =0
TOTAL = 87 OK!
25 MT SB2 03