Page 26 - Keubler Motion Sensors

Basics

Encoders Incremental encoders

Cable lengths for incremental encoders Depending on the output circuit and the electrical noise the following cable lengths are recommended:
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Output circuit max. cable length Encoder connected to e.g.
Push-pull without inverted signals 100 m Kübler counter/SPS
1)
1)
Push-pull with inverted signals 250 m SPS/IPC 2)
Push-Pull with inverted signals (7272) 30 m
RS422 with inverted signals up to 1000 m SPS/IPC
2)
(> 50 m dep. on frequency)
Voltage sine with inverted signals 50 m SPS/IPC 2)
Sine wave 1 Vpp 50 m 10 ... 30 V DC

Annotations:
• Depending on the application the recommended • The core diameter of the voltage supply cores
cable length can be shorter, especially in areas should be large enough depending on the cable
with a high level of electrical noise. length, that the voltage supply of the encoder is
• Always use shielded cables - the shield should high enough and the signals do not go below the
minimum levels!
be connected at both the encoder and controller
ends!
• The core diameter of the signal cores should be
> 0.14 mm 2

1) Depends on frequency
2) IPC = industrial PC
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