Renishaw RLI20-P, User Manual, Page: 7 / 18

3 Installation
The signals should be wired as shown in Table 1:
Table 1 – Signal wiring between RLE or HS20 and RLI20
Signal Function
1st pair Sine and /Sine
2nd pair Cosine and /Cosine
3rd pair Error and /Error
4th pair Ref mark and /Ref mark
Individual screens 0 V (both ends)
Outer screen Case/shell (both ends)
WARNING: It is essential that the error line inputs
are connected so that the RLI20 can determine if any errors
have occurred in the RLE or HS20 system. If the analogue
quadrature is incorrectly wired, the system may still work but
may move distances and at speeds that are not expected and
may move in the opposite direction to that expected. If a voltage
exceeding ±7 V is applied on any of the signals, damage to the
unit can occur.
WARNING: Care should be taken to ensure that
individual signal wires do not short. It is advised that all joints
are sleeved. If input signal wires short, the position output will
be unreliable and the error signal may not work reliably.
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2 Installation
2.1 Analogue quadrature interface
The RLI20 accepts the nominal 1 Vpp analogue quadrature
from the RLE or HS20. Signal termination is contained within
the RLI20 itself. There is no need for any other termination to be
used.
Cabling
The choice of cables for this application is very important. A
cable with individually screened twisted pairs is recommended.
An example of a suitable cable is the Belden 8164 cable. The
maximum recommended cable length is 10 m.