Leibinger JET3 Series Operating Manual page 387

Group 12
Interfaces:
The output signals (interfaces) of encoders are offered in different standards:
Typ
HTL
 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
TTL
 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
RS422
(TTL)
 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.
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!
JET3 Series
Appendix - Encoder Guidelines
Output Signals
Output Signals
Output Signals
ATTENTION
Page 385
Technologie
24 Volt
Technologie
5 Volt
Technologie
5 Volt
Release 2.02