A6175 ROC800-Series Remote Operations Controller Instruction Manual

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ROC800-Series Instruction Manual
Revised Jul-14 Power Connections 3-17
Table 3-9. Power Consumption of the Analog Output Module
I/O Module
Power Consumption (mW) Quantity
Used
Duty
Cycle
Sub-Total
(mW)
Description PTYPICAL
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