6 720 645 347 (2010/09)
Installation (for contractors only)
|
17
3.2.2 Connect the analogue 1-2-4 interface
(only FR 100)
Permissible lead lengths of FR 100 to the heating
appliance:
B
Connect the FR 100 to the heating appliance
with optional connections for analogue 1-2-4
interface (24 V DC).
Fig. 11
FR 100 connected via the analogue 1-2-4
interface.
Lead length
Cross-section
≤
20 m
0.75 mm
2
– 1.50 mm
2
≤
30 m
1.00 mm
2
– 1.50 mm
2
≥
30 m
1.50 mm
2
Tab. 7
The third contact enables the
controller to recognise that it is not
connected via the BUS link but
instead via the analogue 1-2-4
interface.
FR 100
1
2
4
1
2
4
1
2
4
1
2
4
DC 24V
6 720 613 058-04.1R
