A6175 ROC800-Series Remote Operations Controller Instruction Manual

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ROC800-Series Instruction Manual
3-18 Power Connections Revised Jul-14
Table 3-10. Power Consumption of the Discrete Input Module
I/O Module
Power Consumption (mW) Quantity
Used
Duty
Cycle
Sub-Total
(mW)
Description PTYPICAL
DI Module Base 19 mA @ 12 volts dc No
Channels Active 228 mW
Channel 1 3.2 mA @ 12 volts dc 38.4 mW
Channel 2 3.2 mA @ 12 volts dc 38.4 mW
Channel 3 3.2 mA @ 12 volts dc 38.4 mW
Channel 4 3.2 mA @ 12 volts dc 38.4 mW
Channel 5 3.2 mA @ 12 volts dc 38.4 mW
Channel 6 3.2 mA @ 12 volts dc 38.4 mW
Channel 7 3.2 mA @ 12 volts dc 38.4 mW
Channel 8 3.2 mA @ 12 volts dc 38.4 mW
Per Active LED –
Maximum 8 1.5 mA 18 mW
Table Total
Duty Cycle The duty cycle is the time on divided by the total time, and is
essentially the percent of time that the I/O channel is active
(maximum power consumption).
Duty Cycle = Active time ÷ (Active time + Inactive time)
For example, if a Discrete Input is active for 15 seconds out of every 60
seconds:
Duty Cycle = 15 seconds ÷ (15 seconds + 45 seconds) = 15 seconds ÷ 60 seconds = 0.25