Group 12
Appendix - Encoder Guidelines
Page 385
JET3 Series
Release 2.02
Interfaces:
The output signals (interfaces) of encoders are offered in different standards:
Typ
Output Signals
Technologie
HTL
24 Volt
two output signal => „A“ and „B“
isn‘t qualified for longer cable distances (maximum 10m)
in spite of the higher signal level a very good “noise immunity” as with the interface type
RS422 cannot be achieved!
Typ
Output Signals
Technologie
TTL
5 Volt
two output signals
„A“ und „B“
not qualified for longer cable distances (max. 6m)
is quite „noise sensitive“ and therefore almost not qualified for the industrial en
-
vironment and applications.
Typ
Output Signals
Technologie
RS422
(TTL)
5 Volt
four output signals
„A“, „/A“, „B“ und „/B“
due to the inverted signals a very high „noise immunity“ can be realized. Injected
„noise signals“ on long cable lengths almost didn’t show any negative effect.
even qualified for longer cables
over 10m. But the “voltage drop” of the complete
cable length must be checked and judged.
ATTENTION
Please note!
For each interface, in general just shielded and grounded cables shall be
used the reduce any „noise influence“ as much as possible.
Besides the encoder signal cable should not be installed in closer
neighborhood with cables which transmits high frequencies or high energies.
Please avoid to use any unnecessary long cable lengths and keep in mind:
the shorter, the better!
Summary of Contents for JET3
Page 1: ...Operating Manual V2 02 Please keep for future reference ...
Page 2: ......
