S88-2
English
Page 23
EMC declaration
This product is developed in accordance with the European standards
EN 55014 and EN 50082-1, tested corresponding to the EC - directive
89/336/EWG (EMVG of 09/11/1992, electromagnetic tolerance) and
meets legal requirements.
To guarantee the electromagnetic tolerance you must take the
following precautions:
§
Connect the transformer only to an approved mains socket installed
by an authorised electrician.
§
Make no changes to the original parts and accurately follow the
instructions, circuit diagram and PCB layut included with this manual.
§
Use only original spare parts if you have to repair the kit or the
ready-built module.
Operation overview
The s88-Booster reduces the interferences occuring during data transfer
from the s88-feedback modules to the receiver (central unit, PC via
interface or memory). Interference is caused by external electrical
signals such as:
§
switching impulses for points or
§
digital signals in data lines running in parallel to the bus lines.
This interference affects the data transfer and causes faulty input to the
receiver.
Because it is standard to operate the s88-bus with a voltage of 5 V
interference voltages of 2,5 V can cause interference in data transfer.
The longer the s88-data lines are, the higher is the risk of interference.
The s88-booster is connected between receiver and s88-module(s) and
heightens the s88-bus´s supply voltage to 12 V. In consequence
interference voltages of less than 6 V have non influence on the data
transfer in the s88-bus.
