Selectron CPU 72 Series User Manual

CPU 72x
24.05.2019 page 10
1.4.3 Interfaces
The decentralized processor modules CPU 72x are equipped with one (CPU 725-LT/LTH
and CPU 727-T/TH) or two (CPU 723-T) CAN bus interface and one RS-232 interface.
1.4.3.1 CAN Bus
The connection of the CAN bus is realized via a 5 pole terminal (CAN-, GND and CAN+).
CAN Bus
CPU 723-T
CPU 727-T/TH
CPU 725-LT/LT
H
Galvanic separation
CAN1  logic
No
Yes
1)
Yes
1)
CAN1  RS-232C
Yes
1)
Yes
1)
Yes
1)
CAN1  UC
Yes
1)
Yes
1)
Yes
1)
CAN2  logic
Yes
1)
—
—
CAN2  RS-232C
Yes
1)
—
—
CAN2  UC
Yes
1)
—
—
CAN  ground
Yes
1)
Yes
1)
Yes
1)
Test voltage
560 Vac, 800 Vdc
Bit rates
setting via DIP switch S1 and/or software
Max. bit rate
CAN1
1 Mbit/s
500 kbit/s
500 kbit/s
CAN2
500 kbit/s
—
—
Driver
Level according ISO 11898 standard
1)
simple insulation
Fig.09: CAN bus wiring
Note
At the beginning and the end of the CAN bus network the terminal resistances
RT = 120  are to put in (see chapter "Installation, Startup, and Operation",
5.2.3 CAN Bus Termination).

Selectron CPU 72 Series Specifications

General

Brand	Selectron
Model	CPU 72 Series
Category	Computer Hardware
Language	English