Wiring Diagram For Lonworks - Nordmann Engineering AT4 Integration Instructions

2.2

Wiring diagram for LonWorks

to network (via shielded twisted-pair cable)
external
internal
at4 / Unit 1
(leading unit)
– +
**
RJ45
** Termination of the bus system: to ensure the correct function the bus system must be terminated on both ends. For that purpose a jumper must be set on
the connector "JP1-RS 485 Termination" on the control board of the first and the last Nordmann AT4 unit in the bus system. On all intermediate Nordmann
AT4 units the corresponding jumper must be removed (see above diagram).
the successive units must be connected to the net-
work by daisy-chain via the networkLink terminals!
24 V dc/ac
power supply
–
+
Net –
Net +
D1
networkLink
at4 / Unit 2
D0 D1 D0
networkLink
**
RJ45
max. 50 m
at4 / Unit 3
D1 D0
networkLink
**
RJ45
7