Rockwell Automation 2090 Ultra3000 Installation Manual - Manual (Page 82)

Publication 2098-IN003E-EN-P — April 2004
2-40 Ultra3000 Connector Data
Understanding Motor
Encoder Feedback
Specifications The Ultra3000 can accept motor encoder signals from the following
types of encoders:
• Incremental encoders with TTL outputs, with or without Hall
signals
• Sine/Cosine encoders, with or without Hall signals
• Intelligent absolute encoders
• Intelligent high-resolution encoders
• Intelligent incremental encoders
Note: The intelligent absolute, high-resolution, and incremental
encoders are available only in Allen-Bradley motors.
AM, BM, and IM Inputs
AM, BM, and IM Input encoder signals are filtered using analog and
digital filtering. The inputs also include illegal state change detection.
Refer to Figure 2.37 for a schematic of the AM, BM, and IM inputs.
Figure 2.37
Schematic of the Motor Encoder Inputs
10k Ω
10k Ω
+5 V
1k Ω
1k Ω
+
-
56 pF
56 pF
10k Ω
1k Ω
1k Ω 10k Ω
1k Ω
1k Ω
1k Ω
1k Ω
1k Ω
100 pF
+
-
100 pF
56 pF
56 pF
56 pF
56 pF
AM and BM Channel Inputs IM Channel Input
Ultra3000 Drive Ultra3000 Drive