Making The Lon Connection - Viessmann Vitogate 300 Installation And Service Instructions Manual

Installation sequence

Making the LON connection

The Viessmann LON is designed for "line" bus topol-
ogy with a terminator at both ends (accessories).
The transfer distances for LON are subject to the elec-
trical properties of the respective cable. For this rea-
son, only use the specified cable types. Use only one
cable type within each LON.
Cable types (on site):
2-core cable, CAT5, screened
■
■ JY(St)Y 2 x 2 x 0.8 mm (telephone cable)
Observe the requirements for cabling and operation of
the LON interface FTT 10-A.
Connection with LON cable
A A
C
D
Fig. 3 Installation spacing
A Vitotronic control unit
Vitogate 300
B
Connection with LON cable and LON coupling
A
C
D E D D
E
Fig. 4 Installation spacing 7 to 21 m
Vitotronic control unit
A
Vitogate 300
B
Terminator
C
Connection with on-site cable and LON plug
A A
D D
C
E
≤ 900 m
Fig. 5 Installation spacing
nector)
Vitotronic control unit
A
Vitogate 300
B
Terminator
C
10
B
C
D
7 m
≤
A
D E D D
E
F
B
D D
C
E
900 m (with LON con-
≤
All Viessmann appliances are connected with RJ45
connectors. The Viessmann LON always requires
cores "1" and "2" plus the screen. The cores are inter-
changeable.
Note
When connecting on-site components (including a PC/
laptop), observe the insulation requirements of IEC/EN
60335.
C Terminator
LON cable, 7 m long
D
B
C
LON cable, 7 m long:
D
Max. 3 cables between 2 devices
LON coupling
E
LON plug
D
On-site cable
E
F Up to 30 subscribers