Emerson ROC827 Bedienungsanleitung PDF herunterladen (Seite 56)

ROC827 Instruction Manual

Issued Mar-06 Power Connections 3-12

Table 3-6. Power Consumption of the Analog Input Modules

Power Consumption (mW)

I/O Module

Description P

TYPICAL

Quantity

Used

Duty

Cycle

Sub-Total

(mW)

ANALOG INPUT

AI Module Base

84 mA @ 12 volts dc 1008 mW

Jumper set for +T @ 12 volts dc

Channel 1

Channel’s mA current

draw from +T

1.25

Channel 2

Channel’s mA current

draw from +T

1.25

Channel 3

Channel’s mA current

draw from +T

1.25

Channel 4

Channel’s mA current

draw from +T

1.25

Jumper set for +T @ 24 volts dc

Channel 1

Channel’s mA current

draw from +T

2.50

Channel 2

Channel’s mA current

draw from +T

2.50

Channel 3

Channel’s mA current

draw from +T

2.50

Channel 4

Channel’s mA current

draw from +T

2.50

Table Total

Duty Cycle

The duty cycle is based on the average current flow compared to the

full-scale current flow value. To approximate the duty cycle, estimate

the average current consumption in relation to its maximum range. For

example, if an AI channel’s current averages 16 mA:

Duty Cycle = Average mA output ÷ Maximum mA Output = (16 ÷ 20) = 0.80

1 2 ... 51 52 53 54 55 56 57 58 59 60 61 ... 139 140

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