Bucher EMD G 0 Series, Hardware Manual

Page: 65 / 80

Installation
Connections of MOBILE DCU, PSU, DCU PSU
Activating the terminating resistor
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300−I−9052003−EN−04/07.2021
5.6.8 Activating the terminating resistor
In order to ensure a troublefree operation, a 120
W
terminating resistor must be connected
to the last device of a CAN bus.
ƒ
For Public CAN, the terminating resistor is integrated in each device. It is activated by
two bridges:
– Bridge between X31/1 (CAN_H_TERM_PUBLIC) and X31/2 (CAN_H_PUBLIC)
– Bridge between X31/11 (CAN_L_TERM_PUBLIC) and X31/3 (CAN_L_PUBLIC)
ƒ
For Private CAN. no terminating resistor is integrated. The terminating resistor must
be connected externally.
HCU
EMDAG2 ... 4
X31
Public CAN
CAN_H_PUBLIC CAN_L_TERM_PUBLIC CAN_H_PUBLIC
1 2 11 9 10 3
CAN_L_PUBLIC CAN_L_PUBLIC CAN_H_TERM_PUBLIC
60 60
n = 1 + x
EMDAG2 ... 4
X31
Public CAN
CAN_H_PUBLIC CAN_L_TERM_PUBLIC CAN_H_PUBLIC
1 2 11 9 10 3
CAN_L_PUBLIC CAN_L_PUBLIC CAN_H_TERM_PUBLIC
60 60
n = 1
EMDAG2 ... 4
X31
Public CAN
CAN_H_PUBLIC CAN_L_TERM_PUBLIC CAN_H_PUBLIC
1 2 11 9 10 3
CAN_L_PUBLIC CAN_L_PUBLIC CAN_H_TERM_PUBLIC
60 60
EMDAG044
Fig. 5−2 Public CAN: activate terminating resistor
EMDAG2 ... 4
X31 6 5
Private CAN
CAN_H_PRIV
AT
E
CAN_L_PRIV
AT
E
EMDAG2 ... 4
X31 6 5
Private CAN
CAN_H_PRIV
AT
E
CAN_L_PRIV
AT
E
EMDAG2 ... 4
X31 6 5
Private CAN
CAN_H_PRIV
AT
E
CAN_L_PRIV
AT
E
HCU
120
n = 1 + x n = 1
EMDAG050
Fig. 5−3 Private CAN: activate terminating resistor