ROC827 Instruction Manual

Table 3-7. Power Consumption of the Analog Output Modules

I/O Module

Power Consumption (mW)

Quantity

Duty

Sub-Total

Description

PTYPICAL

Used

Cycle

(mW)

 

 

 

 

 

 

 

 

 

 

 

AO Module Base

100 mA @ 12 volts dc

1200 mW

 

 

 

Jumper set for +T @ 12 volts dc

 

 

 

 

 

Channel 1

Channel’s mA current

 

 

 

 

draw from +T *

1.25 * 12

 

 

 

 

 

 

 

 

 

Channel 2

Channel’s mA current

 

 

 

 

draw from +T *

1.25 * 12

 

 

 

 

 

 

 

 

 

Channel 3

Channel’s mA current

 

 

 

 

draw from +T *

1.25 * 12

 

 

 

 

 

 

 

 

 

Channel 4

Channel’s mA current

 

 

 

 

draw from +T *

1.25 * 12

 

 

 

 

 

 

 

 

 

Jumper set for +T @ 24 volts dc

 

 

 

 

 

Channel 1

Channel’s mA current

 

 

 

 

draw from +T *

2.50 * 12

 

 

 

 

 

 

 

 

 

Channel 2

Channel’s mA current

 

 

 

 

draw from +T *

2.50 * 12

 

 

 

 

 

 

 

 

 

Channel 3

Channel’s mA current

 

 

 

 

draw from +T *

2.50 * 12

 

 

 

 

 

 

 

 

 

Channel 4

Channel’s mA current

 

 

 

 

draw from +T *

2.50 * 12

 

 

 

 

 

 

 

 

 

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 AO channel’s current averages 12 mA:

Duty Cycle = Average mA output Maximum mA Output = (12 20) = 0.60

Issued Mar-06

Power Connections

3-13

Page 57
Image 57
Emerson ROC827 Power Consumption of the Analog Output Modules, Used Cycle AO Module Base, 100 mA @ 12 volts dc 1200 mW