Specifications

System Configuration Introduction
Quick Start Guide for the MELSEC STlite Series 1 - 1
1 Introduction
This Quick Start Guide explains the basic procedures for the first-time use of the modules of the
MELSEC STlite series.
For additional information and a detailed mounting and wiring description of the MELSEC STlite
series, please refer to the installation manual.
1.1 System Configuration
STlite is a modular, field bus independent I/O system. It is comprised of a head station and up to 64
connected modules for any type of signal. Together, these make up the field bus node. An end module
completes the node.
Head stations are available for different field bus systems, such as Profibus DP, Ethernet TCP/IP or
CC-Link.
The head station contains the field bus interface, electronics and a power supply terminal. The field
bus interface connects the node to the relevant field bus. The electronics process the data of the I/O
modules or special function modules and make it available for the field bus communication. The 24 V
system supply and the 24 V field supply are fed in via the integrated power supply terminal.
Modules for diverse digital and analog I/O functions as well as special functions can be connected to
the head station. Populating the nodes with STlite modules is based on the requirements of the appli-
cation. The communication between the head station and the bus modules is carried out via an inter-
nal bus.
STlite has a clear port level with LEDs for status indication, insertable markers and pullout group iden-
tification plate bracket. The 3-wire technology supplemented by a ground wire connection allows for
direct sensor/actuator wiring.
"ST" means "Slice Type terminal", and refers to the narrow width of the modules (only 12 mm!).
Fig. 1-1: Field bus node
Head station Digital or analog I/O modules, special function modules,
power supply modules
End module