Emerson ROC827 instruction manual Estimated Power Consumption

ROC827 Instruction Manual

Table 3-5. Estimated Power Consumption

Device	Power Consumption (mW)		Quantity	Sub-Total
	Description	PTYPICAL	Used	(mW)
CPU and ROC827 Backplane
Power Input Module PM-12	110 mA @ 12 volts dc	1320 mW
Power Input Module PM-24	55 mA @ 24 volts dc	1320 mW
Per Active LED – Maximum 10	1.5 mA	18 mW
EIA-232 (RS-232) Module	4 mA @ 12 volts dc	48 mW
Per Active LED – Maximum 4	1.5 mA	18 mW
EIA-422/485 (RS-422/485) Module	112 mA @ 12 volts	1344 mW
Per Active LED – Maximum 2	1.5 mA	18 mW
Dial-up Modem Module	95 mA @ 12 volts dc	1140 mW
Per Active LED – Maximum 4	1.5 mA	18 mW
Expanded Backplanes
	70 mA @ 12 volts dc	840 mW
	35 mA @ 24 volts dc	840 mW

	Total for ROC827 Base Unit	mW
AI Modules	Total (from Table 3-6)
AO Modules	Total (from Table 3-7)
DI Modules	Total (from Table 3-8)
DO Modules	Total (from Table 3-9)
DOR Modules	Total (from Table 3-10)
PI Modules	Total (from Table 3-11)
MVS Modules	Total (from Table 3-12)
RTD Modules	Total (from Table 3-13)
Thermocouple Modules	Total (from Table 3-14)
HART Modules	Total (from Table 3-15)
	Total for All Modules	mW
	Total for ROC827 Base Unit and All Modules	mW
Other Devices	Total (from Table 3-16)	mW
	Total for ROC827 Base Unit, All Modules, and	mW
	Other Devices
	Power System Safety Factor (0.25)	mW
	Total for Configured ROC827	mW

Issued Mar-06 Power Connections 3-10