Rockwell Automation 1760-xxxx Pico GFX-70 Controllers User Manual - Manual (Page 386)

Publication 1760-UM002B-EN-P - March 2005
A-14 Specifications
Inductive load without external suppressor circuit
General explanations:
T
0.95
= time in milliseconds until 95% of the stationary current is reached
T
0.95
≈ 3 x T
0.65
= 3 x L
R
Table A.14 Utilization Category in Groups for Q1 to Q4, Q5 to Q8
T
0.95
= 1 ms
R = 48
Ω
L = 16 mH
Utilization factor per group g = 0.25
Relative duty factor 100%
Max. switching frequency
f = 0.5 Hz
Max. duty factor
DF = 50%
1500 switch operations per hour
DC13
T
0.95
= 72 ms
R = 48 Ω
L = 1.15 H
Utilization factor g = 0.25
Relative duty factor 100%
Max. switching frequency
f = 0.5 Hz
Max. duty factor
DF = 50%
1500 switch operations per hour
Table A.15 Utilization Category for Other Inductive Loads
T
0.95
= 15 ms
R = 48
Ω
L = 0.24 H
Utilization factor g = 0.25
Relative duty factor 100%
Max. switching frequency
f = 0.5 Hz
Max. duty factor
DF = 50%
1500 switch operations per hour
Inductive loading with
external suppressor
circuit for each load
(See Connecting
Transistor Outputs on
page 2-30) Utilization factor g = 1
Relative duty factor 100%
Max. switching frequency
Max. duty factor
Number of switch operations per hour depends on
the suppressor circuit