Technical data

87
Installation – Vitocontrol-S, VD2/CT3/CM2
Making the LON connection (continued)
Connection with


Viessmann LON cable,


On-site cable for extensions up to 900 m / 3000 ft.
A Control unit or Vitocom
B LON cable, Part No. 7143 495
C End of line resistor (standard
delivery of Vitocontrol-S,
VD2/CT3/CM2)
D Up to 99 participants and the
corresponding number of junction
boxes and cables
E Junction box
F Connecting cable (on site)
Please note:
The Viessmann LON system always
requires the two wires and shielding.
Wires are interchangeable.
Observe the requirements for cabling
and operation of the LON interface
FTT-10A (see www.echelon.com).
Power supply
Legend
L: Line
N: Neutral
G: Ground
A Power supply 120 VAC, 1PH,
60Hz, provide disconnect means
and overcurrent protection as per
local codes
B Terminal fÖ in connection
enclosure
C Connection enclosure
1. Ensure that the main power supply
to the control contains overcurrent
protection with a minimum rating of
6A and 2-pole disconnect
2. Connect power supply wire to the
connection fÖ terminals 11, N and G
on the DIN rail inside the connection
enclosure.
5351 340 v1.4
E
C
B
C
7 m / 23 ft
B B B
F
A A A
max. 900 m / 3000 ft.
E E
E
D
7 m / 23 ft
7 m / 23 ft
7 m / 23 ft
The control must be grounded.
Ensure that “L”, “N” and “G” are not
interchanged.
WARNING