Viessmann GC1 - Making the LON Connection

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Vitotronic 100, GC1B / Vitotronic 300-K, MW1B Installation and Service
Making the LON Connection
The Viessmann LON system is designed for the
“Line” BUS topology with a terminator at both ends
(accessories). The transfer distances for LON are subject
to the electrical properties of the respective cabling.
For this reason, only use the stated cable types.
Use only one type of cable within the LON.
Observe the cabling requirements for the operation of
the LON interface FTT 10-A (see www.echelon.com).
Vitotronic 300-K, Installation
The line may be up to ≤ 23 ft. (7 m) long
Legend
A Control unit or Vitocom
B LON cable, 23 ft. (7 m) long
C Terminator
All Viessmann equipment is connected via RJ45 plugs.
The Viessmann LON system always requires the cores
“1” and “2” and the screen. The cores are
interchangeable. The installation is therefore safe from
pole errors.
Connection with Viessmann LON cable and coupling
Connection with on-site cable and LON plug
The line may be up to ≤ 3000 ft. (900 m)
(with LON plug)
Legend
A Control unit or Vitocom
B On-site cable
C Terminator
D LON plug
E Up to 99 participants
Installation spacing 23 to 69 ft. (7 to 21 m)
Legend
A Control unit or Vitocom
B LON cable, 23 ft. (7 m) long
Max. 3 cables between 2 appliances
C Terminator
D LON coupling
Connection with Viessmann LON cable
Connection with LON cable, on-site cable and LON
junction box
Legend
A Control unit or Vitocom
B LON cable, 23 ft. (7 m) long
C Terminator
D LON junction boxes
E On-site cable
F Up to 99 participants
The line may be up to ≤ 3000 ft. (900 m) (with LON
junction boxes)
≤ 3000 ft.
≤ 3000 ft.