Rockwell Automation 8720MC Drives Integration Manual - Manual (Page 191)

Publication 8720MC-IN001D-EN-P — December 2002
8720SM Motor Specifications and Performance Curves D-3
8720MC I/O Specifications
Feedback Specifications
Feedback specifications for the 8720SM motors are given in the table
below.
Specification Type Value
24V dc input current - sourcing 3.3 to 12 mA
24V dc output current sourcing
capability
up to 75 mA
Dry contact current capacity 5A AC or DC
Dry contact voltage range
up to 30V dc
(250V ac)
24V dc registration input current 5 to 15 mA
24V dc registration input voltage
range
17.5 to 38V dc
5V dc registration input current 5 to 15 mA
5V dc registration input voltage 4 to 7.5V dc
±10V dc analog input resolution
1.25 mV/LSB
(14 bits)
±10V dc analog output resolution
5 mV/LSB
(12 bits)
Available 22V dc ±25% VDC output
power
120 mA continuous
Available 5V dc ±10% VDC output
power
250 mA continuous
SERCOS data rate 4 or 8 Mbits/sec
SCANport data rate 125 kbits/sec
DPI data rate 500 kbits/sec
Specification Type
SRM Value
8720SM-xxxxxxxS1
Motors SRS Value
8720SM-xxxxxxxS2
Motors SNS-60 Value
8720SM-xxxxxxxS3 and
-xxxxxxxS4 Motors
Absolute accuracy ±7 Arc seconds ±7 Arc seconds ±60 Arc seconds
Number of sinusoidal periods per
revolution
1024 1024 1024
8720MC Drive position resolution 4 million counts/rev 4 million counts/rev 4 million counts/rev
Input voltage range 7 to 12V dc 7 to 12V dc 7 to 12V dc
Operating current without loads 130 mA 80 mA 100 mA
Available memory (bytes) 128 128 128
Max recommended cable length 90 m 90 m 90 m