6.3.3.2. Fieldbus Connection For Loop Topology - AUMA SAEx 07.2 Manual

SAEx 07.2 SAEx 16.2/SAREx 07.2
ACExC 01.2 Intrusive Modbus RTU

6.3.3.2. Fieldbus connection for loop topology

Information
SAREx 16.2 Control unit - electromechanical
Figure 33: Loop topology
□ Channel 1
▣ Channel 2
Last fieldbus device
■
n 1 Fieldbus cable from previous device (input)
n+1 Fieldbus cable to next device (output)
For loop topology, automatic termination is performed once the actuator controls
are connected to the power supply.
In case of a power outage of actuator controls, the two RS-485 loop segments
will be automatically connected so that the actuators following these segments
remain available.
When using a SIMA master station, a redundant loop topology may be estab-
lished.
Connection at terminal carrier for loop topology
For flexible cables, the fieldbus connection can be made via spring clamp terminals
directly at the terminal carrier. For solid cables (single or multiple strands), additional
support terminals must be used. Refer to <Connection with support terminals> section
Figure 34: Terminal assignment at terminal carrier (2-channel)
[XK] Terminal assignment according to wiring diagram (customer connection)
□ Channel 1
▣ Channel 2
n 1 Fieldbus cable from previous device (input via channel 1)
n+1 Fieldbus cable to next device (input via channel 2)
Connection with support terminals for loop topology
When using solid cables (single or multiple strands), additional support terminals
must be used.The support terminals (terminal blocks) are mounted above the terminal
carrier.
Electrical connection
35