Chapter
5
Operating Instructions
Laser measurement sensor LD-MRS
72
©
SICK AG · Germany · All rights reserved · Subject to change without notice
8012948/ZMQ0/2017-06-09
Electrical installation
Caption:
1
Terminal for the power supply V+
2
Terminal V
P
3
Terminal for the power supply GND
4
Switch for termination
5
DIP switch for the transmission rate
6
DIP switch for the address
7
Terminal for the CAN bus CAN_H and CAN bus CAN_L
8
LED
9
Terminal strip of digital switching inputs/outputs 1 to 4
bl
Terminal strip of digital switching inputs/outputs 5 to 8
CAN bus
Since the fixed transmission rate of the LD-MRS is 500 kBit/s, the maximum bus line length
is 100 m (328 ft).
ISO 11898 recommends the following wire cross section: 0.25 mm
2
(24 AWG) (for 0 to
40 m (0 to 131.2 ft)) and 0.34 mm
2
(22 AWG) (for 40 to 100 m (131.2 to 328 ft)).
The bus must be connected to each end of the cable with a 120 Ohm resistor (terminated).
It is recommendable to use a shielded (braided), twisted two-wire cable with a surge imped-
ance of 120 Ohm.
Fig. 5-5:
Design of the CAN module
μ
CAN.
8
.dio-SNAP
1
2
3
4
5
6
7
8
9
10