Rockwell Automation 1395 Encoder Driver Module User Manual
Page 4

Encoder Driver Module
Instructions
4
Quadrature Encoder/ Impedance Isolation – Figure 3 depicts a single
quadrature encoder used for impedance isolation of the drive feedback
input signal on an AC drive. In this case, the feedback input signal of a
1399 AC drive is isolated from other controllers using the same encoder
signals, which are creating common loops resulting in noise interference
with the feedback signals of the 1399 drive.
Figure 3.
Encoder Driver Module Impedance Isolation, 1399 Drive
TB1
TB2
Encoder Driver
Interface Module
1
2
3
4
5
1
5
AI1
AI2
2
AO1
NAO1
BO1
NBO1
+
TB2
TB Shields
CH 1
Input
TB1
TB1
7
6
Common
BI2
4
3
BI1
A
A
B
B
Encoder A
Encoder B
TB1
CH 1
Output
To Switch
Cabinet etc.
TB2
7
8
9
10
AO2
NAO2
BO2
NBO2
NOT
USED
–
8
Encoder Power
Supply Common
12 VDC Power Supply, 250 milliamperes minimum
Common
CH 2
Input
(Not Used) CH 2
Output
(Not Used)
DRIVE
SIDE
Tools and Equipment
You will need the following equipment to successfully install the Encoder
Driver Module:
•
A small flat blade screwdriver
•
A wire stripper
•
An electric drill
•
2 mounting screws (8–32) and a tap
•
Cable, Alpha 2256 or equivalent
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