Emerson ROC827 Power Consumption of the Discrete Output Relay Modules, DOR Module

ROC827 Instruction Manual

Table 3-10. Power Consumption of the Discrete Output Relay Modules

Power Consumption (mW)		Quantity	Duty	Sub-Total
I/O Module		Used	Cycle	(mW)
Description	PTYPICAL

DOR Module

Channel 1

Channel 2

Channel 3

Channel 4

Channel 5

Per Active LED – Maximum 5

6.8mA @ 12 volts dc No Channels Active

150 mA for 10 mSec

during transition

150 mA for 10 mSec

during transition

150 mA for 10 mSec

during transition

150 mA for 10 mSec

during transition

150 mA for 10 mSec

during transition

1.5 mA

81.6 mW

1800 mW

for 10 mSec

1800 mW

for 10 mSec

1800 mW

for 10 mSec

1800 mW

for 10 mSec

1800 mW

for 10 mSec

18 mW for

10 mSec

Table Total

Duty Cycle The duty cycle is:

[((Number of Transitions in some time period) * 0.01 sec)] ⎟ (Seconds in the period) = Duty Cycle

For example, if a DOR channel changes state 80 times per hour:

ƒ80 = Number of transitions.

ƒHour is the time period.

ƒAn hour contains 3600 seconds. Calculate the duty cycle as:

Duty Cycle = [(80 * 0.01) ⎟ 3600] = 0.0002

Issued Mar-06 Power Connections 3-16