CR720S CR721S
10
WARNING
Load dump and surge
w
Destruction of the device or deterioration of the safety function
u
Always connect VBB
0
.
The CAN bus is internally protected against short circuit to VBB and GND.
For CAN cables ≥ 30 m, ensure appropriate protection against surge (e. g. shielded cables).
6.5.1 GND connections
u
Connect the GND
₁
...
₄
and GND
SYS
connections individually to the common GND star point.
u
Connect the GND connections of the sensors of the high-side digital inputs (CSO) and the
actuators (loads) to the common GND star point.
WARNING
Wrong connection of the GND connections
w
Loss of the safety function, the measurement accuracy and EMC possible
u
Do not connect the GND
ANA
, GND
RES
and GND
OVA
connections to the common GND
star point, but to the GND of the signal source or of the connected device.
6.6 Analogue inputs
Abbreviation
Input / output type
A
Analogue
B
H
Binary high side (CSO)
B
L
Binary low side (CSI)
FRQ
L/H
Frequency/pulse inputs configurable low side (CSI) / high side (CSO)
PWM
H
Pulse-width modulation high side (CSO)
PWM
L
Pulse-width modulation low side (CSI)
PWMI
Pulse-width modulation current-controlled
R
Resistor input
VBB
₀
...
₅
Supply output group
VBB
30
Supply controller
