The Can-Bus; The Bus Topology - Record DFA127 Instructions Manual

13.2

The CAN-Bus

13.2.1

The bus topology

General Bus structure
Installation with 2 motion sensors
102-127108955
IMPORTANT
Every bus component has two plug connections, which must both be plugged for
correct wiring.
The bus must basically be terminated at both ends with a terminating resistance
(120 Ω).
IMPORTANT
Make sure that no CAN sockets are left unplugged. Either all sockets are used or
they will be plugged witha terminating resistor.
NOTICE
The BDE-D is always delivered with a terminating resistor connected to it.
The second terminating resistor is located in STM (Jumper J8)
Commissioning DFA 127
V1.1
13
45/ 102