Rockwell Automation 4100 ALEC AXIS LINK ENCODER CONVERTER - Manual (Page 55)

47 Publication 4100-5.3 - June 1999
Appendix
B
Upgrading From ALEC Series C to Series D
The ALEC Series D has undergone some changes that affect the
mounting, wiring, and configuring of the ALEC when upgrading from
an ALEC series C to an ALEC series D.
Summary of Changes Physical Dimensions
The length and width of the box have seen no appreciable difference
in size. The depth of the box has the greatest significance. The ALEC
series C has a depth of 4.5inches (114 mm) and the ALEC series D has
a depth of 5.125 inches (30.175 mm). However, the new design of the
mounting tabs decreases the difference to .25 inches (6.35 mm).
This should pose no problems for wiring the ALEC series D using
existing cabling.
Mode Rotary Switch
The Mode rotary switch has changed from a 10 position switch to a 16
position switch. The positions 0-7 are still used for setting the
frequency of the encoder position update. However the values are
not the same as they were in the ALEC series C. The following table
contains the Series C and the Series D frequency values.
Table B.1 Comparative Frequency Values
Switch Setting ALEC Series C ALEC Series D
0 1000 Hz 250 Hz
1 1000 Hz 300 Hz
2 700 Hz 350 Hz
3 700 Hz 400 Hz
4 500 Hz 500 Hz
5 500 Hz 700 Hz
6 350 Hz 850 Hz
7 350 Hz 1000 Hz
8 250 Hz Reserved