1functional description of hardware – BECKHOFF C1120 User Manual
Page 3
C1120 S5 to II/O Lightbus Interface
Beckhoff II/O-Lightbus System
Date 27.06.97
Version 2.1
Page 3 of 52
1
Functional description of Hardware
C1120
General
The interface card C1120 is an intelligent interface between the BECKHOFF II/O-Lightbus
System and a SIEMENS SIMATIC S5 PLC. The SIEMENS PLC program is enabled to
access binary and analog inputs and outputs of the II/O-Lightbus System via a Dual Ported
RAM of the interface card. The I/O addresses of the II/O-Lightbus System are mapped to the
S5 I/O address memory map with a configuration program running on a personal computer.
The interface card C1120 is placed in a PLC slot for ‘intelligent peripherial devices’.