Product Description XI/ON - Eaton Automation

XI/ON: Gateways for Modbus TCP 7 Guidelines for Station Planning
Figure 71:
Using the C-rail as
protective earth
and for the power
supply with relay
modules
Attention
When relay modules are planned and the C-rail is used for a common
voltage supply, a further power distribution module must be
used for the potential isolation to the following modules. The C-rail
can only again be used as a PE following potential isolation.
PE
terminal
10/100 MBit
+ - + -
Cross-connecting relay module roots is achieved by the use of
jumpers. The corresponding connection diagrams can be found in
the following manual:
M001736
Product Description XI/ON
Digital I/O-Modules, Supply Modules
7.2.5 Direct Wiring of Relay Modules
PF
11 21 11 21 11 21 11 21 11 21 11 21 11 21 11 21 11 21 11 21
12 22 12 22 12 22 12 22 12 22 12 22 12 22 12 22 12 22 12 22
13 23 13 23 13 23 13 23 13 23 13 23 13 23 13 23 13 23 13 23
C-rail (PE)
C-rail (24 V DC)
14 24 14 24
14 24 14 24 14 24 14 24 14 24
SBBC
As well as the options mentioned above, relay modules can be wired
directly. In this case, base modules without C-rail connections
should be chosen to guarantee the potential isolation to the
adjoining modules.
M001973-01, 07/2007 161
2 DO
SBC
2 DI
SBBC
2 DO 2 DI
SBC
SBB
PF NO NC
SBBC
SBCS
SBCS
NO
SBCS
NC
SBCS
TS