F&F LT-04 Quick Start Manual

LT-04
RS-485 network
termination module
Do not dispose of this device in the trash along with other waste!
According to the Law on Waste, electro coming from households free of charge and can
give any amount to up to that end point of collecti on, as well as to store the occasion of
the purchase of new equipment (in accordance with the principle of old-for-new, regard-
less of brand). Electro thrown in the trash or abandoned in nature, pose a threat to the
environment and human health.
Purpose
The LT-04 module is used for termination, polarisation and signal
amplification of the signal line of the RS-485 network.
Functioning
Termination is the termination of the signal line (UTP cable)
with suitable resistances in order to maintain a uniform wave
resistance of the entire line, which significantly improves the
quality of the transmitted data and eliminates errors arising on
the signal line.
Line polarisation is performed when at least one of the slave de-
vices in the RS-485 network does not have a signal GND point.
Polarisation is carried out only for the master device.
Signal amplification is realised by active feeding of the line with
low voltage through one of the modules.
F&F Filipowski L.P.
Konstantynowska 79/81, 95-200 Pabianice, POLAND
phone/fax (+48 42) 215 23 83 / (+48 42) 227 09 71
www.fif.com.pl; e-mail: biuro@fif.com.pl
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