Hans Turck BL20-E-GW-CO, Instructions For Use Manual

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Guidelines for station planning
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The C-rail can be used as required by the application, for example, as a protective earth (PE). In this
case, the PE connection of each power distribution module must be connected to the mounting rail
via an additional PE terminal, which is available as an accessory.
C-rails can be used for a common voltage supply when relay modules are planned. To accomplish
this, the load voltage is connected to a Power Feeding module with the BL20-P4x-SBBC base mod -
ule. All the following relay modules are then supplied with power via the C-rail.
Abb. 4: Using the C-rail as a protective earth
NOTE
For information about introducing a BL20 station into a ground reference system, please
read
chapter 8
,
Guidelines for Electrical Installation
.
NOTICE
Missing potential isolation
Destruction of module electronic
†
Ensure that after using the C-rail for the common voltage supply of relay modules an
additional supply module is used for the potential separation to the following modules.
Only then can the C-rail serve as PE again.
23
22
21
13
12
11
23 23
22 22
21 21
13 13
12 12
11 11
23 23 23
22 22 22
21 21 21
13 13 13
12 12 12
11 11 11
24 24
23 23
22 22
21 21
14 14
13
13
12 12
11 11
24
23
22
21
14
13
12
11
TS
SBBC
2 DO
SBC
8 DI
ECO 2 DO
SBC
2 DI
SBB
PF
SBBC
2 DI 2 DO
SBBC SBC
2 DO
SBC
2 DI
SBB
C-rail (PE) C-rail (PE)
PE
terminal
PF
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
Unlock end-bracket befor
e dismounting
Pull barrier for configuration and service
!
UL
GNDL
USYS
GNDSYS
CAN_H
CAN_L
CAN_H
CAN_L
CANGND
CANGND
GW
IOs
BL20-E-GW-CO
SERVICE
1 0
ADDRESS
20
21
22
23
24
25
RT
ERR
Bus
off on
BR
20
21
22