Rockwell-automation 1760-xxxx Pico GFX-70 Controllers User Manual Manual do Utilizador descarregar pdf (Página 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

1 2 ... 381 382 383 384 385 386 387 388 389 390 391 ... 399 400

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