
6. CONNECTION OF I/O UNITS TO
MACHINE INTERFACE
B–63783EN/01
94
NOTE
1 Modules need to be spaced at least 32 mm apart, in which
case a flat cable of about 20 mm in length is required. To
install modules further away from each other, the cable
length will be 20 mm plus the extra distance. Note that the
maximum length of a flat cable is 100 mm.
2 To ensure adequate ventilation, install the modules in such
a way that the flat cables lie on top of them. The basic
module has a vent at the top (as indicated by the dotted lines
in the above figure). When connecting modules, install
extension modules so that the flat cables do not cover the
vent, as shown in the above figure.
When mounting an expansion module directly on the
branch–connection PC board, place it on the right side of
the basic module as you face the mounting surface. When
mounting an expansion module using a DIN rail or screws,
place it on the left side of the basic module.