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ROC800-Series Instruction Manual

3-24

Power Connections

Revised Jul-14

Table 3-19. Power Consumption of the HART-2 Module

Other Device

Power Consumption (mW)

Quantity

Used

Duty

Cycle

Sub-Total

(mW)

Description

P

TYPICAL

HART-2 Module Base

110 mA @ 12 volts dc

1320 mW

Each Channel

Channel’s mA current

draw from +T * 2.50 * 12

Table Total

Table 3-20. Power Consumption of the IEC 62591 Module

I/O Module

Power Consumption (mW)

Quantity

Used

Duty

Cycle

Sub-Total

(mW)

Description

P

TYPICAL

IEC 62591 Module

1

Pm-12 (12V) WiHart card

only

552 mW

1

Pm-24 (24V) WiHart card

only

720 mW

1

Pm-12 (12V) WiHart w/

Transmitter

1080 mW

1

Pm-24 (24V) WiHart w/

Transmitter

1200 mW

1

Table Total

Duty Cycle

An IEC 62591 has

no

associated duty cycle. Consequently, always set

“1” as the duty cycle value.

Table 3-21. Power Consumption of the NRM Module

I/O Module

Power Consumption (mW)

Quantity

Used

Duty

Cycle

Sub-Total

(mW)

Description

P

TYPICAL

NRM Module

1

Pm-12 (12V) Joining

Network

780 mW

1

Pm-24 (24V) Joining

Network

720 mW

1

Pm-12 (12V) linked to

Network

240 mW

1

Pm-24 (24V) linked to

Network

240 mW

1

Table Total

Duty Cycle

An NRM has

no

associated duty cycle. Consequently, always set “1”

as the duty cycle value.