turck BL20-GW-CANOPEN, User Manual, Page: 62 / 95

Guidelines for Station Planning
D301087 1211 - BL20 CANopen 6-8
6.2.3 Creating Potential Groups
Bus Refreshing and Power Feeding modules can be used to create potential groups. The potential
isolation of potential groups to the left of the respective power distribution modules is provided by the
base modules.
When using a digital input module for 120/230 V AC, it should be ensured that a potential group is
created in conjunction with the Power Feeding module BL20-PF-120/230VAC-D.
6.2.4 Protecting the Service Interface on the Gateway
During operation, the cover protecting the service interface and the rotary coding-switches must
remain closed due to EMC and ESD.
Attention
Ensure that the correct base modules are planned for when using Bus Refreshing modules.
Figure 6-3:
Example for
creating potential
groups with
BL20-GWBR-
CANOPEN
Note
The system can be supplied with power independent of the potential group formation
described above.
Attention
It is not permitted to use the modules with 24 V DC and 120/230 V AC field supply in a joint
potential group.
23
22
21
13
12
11
23 23
22 22
21 21
13 13
12 12
11
24
23 23
22 22
21 21
14
13 13
12 12
11 11
Potential group 2
2L+ 2L-
2 DO 2 DI PF 2 DO 2 DI
24
23
22
21
14
13
12
11
Potential group 1
TS
2 DI AI NO
24
23
22
21
14
13
12
11
24
23
22
21
14
13
12
11
24
23
22
21
14
13
12
11
24
23
22
21
14
13
12
11
NO
AI
24
23
22
21
14
13
12
11
Gateway
GND
CAN_L
Shield
CAN_H
+–
+
–
System supply
Field supply