LINEPULS & LINECOD catalogue 2016 in English

LINECOD
Additional functions for analogue encoders
Fault output connected to a relay
Figure 2
No encoder error = coil energized
Encoder error = coil de-energized
Example
Vdc = +24V
R1 = 47Ω
I = 30 mA (current needed to energize a small relay coil)
R2 = 750 Ω
We highly recommend the cable lengths reported in the following tables to be fulfilled
strictly. Tests have been carried out by connecting the encoder to the Lika LD200 universal
position display through a DS3486 line receiver complying with the EIA standards.
Data listed below may vary due to the following factors:
• the electrical noise coming from the power supply line;
• the electrical noise coming from the encoder earthing connection;
• the features of the controller connected to the encoder;
• the ambient temperature.
Cable lengths
Maximum cable lengths in relation to frequencies.
Interface / output circuit Max. cable length @ Frequency
SSI (RS-422)
400 m / 1310 ft 100 kHz
75 m / 245 ft 400 kHz
BiSS
1000 m / 3280 ft 100 kHz
60 m / 200 ft 2 MHz
Analogue output
Voltage analogue
Current analogue
Max. cable length
100 m / 328 ft
with 1 MΩ max. load
150 m / 490 ft
At ambient temperature (23°C)
Please note that the higher the resolution and the maximum travel speed of the encoder, the
higher the counting frequency. There is a straight relation between the counting frequency
and the signal distortion. The longer is the cable in fact, the greater is its capacitance; and
the capacitance affects the signal quality causing the higher frequencies to be “filtered” so
distorting the signal. Please always refer to the maximum counting frequency value indicated
in the product datasheet.
44