Omron 3G3FV-PDRT1-SIN Splitting the System into Multiple Power Supplies, Right Side Calculation

CompoBus/D Communications Line Design Chapter 2

Right Side Calculation

Node 4: (40 0.015 + 1 0.005) 0.15 = 0.09075 (V)

Node 5: (80 0.015 + 2 0.005) 0.25 = 0.3025 (V)

Node 6: (120 0.015 + 3 0.005) 0.15 = 0.27225 (V)

If 0.09075 + 0.3025 + 0.27225 = 0.6655 V x 4.65 V, the conditions are satisfied.

2-3-4 Step 3: Splitting the System into Multiple Power Supplies

Go to Step 3 if the best location for the nodes cannot be calculated from the formulae. In the third step, there are multiple power supplies and the power supply system is split.

HSplitting the Power Supply System

•Be sure to use a Power Supply Tap for each power supply when the Network is supplied by two or more power supplies.

•Remove the fuses in the Power Supply Tap to split the power supply system.

Once the power supply system is split, return to Step 1 or 2, and determine the best location of the nodes in each system.

HPower Supply Tap Configuration

Connector C

Fuse A Fuse B

Power supply cable

Cable A

Model 1485T-R2T5-T5

Specification Power supply tap (with a grounding terminal and reverse current prevention function )

Manufacturer Allen-Bradley

Cable B

Connector A Connector B

HInternal Circuitry of the Power Supply Tap

Power Supply Tap

Fuse A Fuse B

	V+
5-wire cables	CAN H
	Shield
on side A
	CAN L
	V–

Schottky diode

Ground V– V+ terminal

Power supply device on side C

V+

CAN H

Shield 5-wire cables on side B

CAN L

V–

Fuses used: Littel fuse 312008 Rated amperage: 8 A Rated voltage: 250 V 6.35 Φ x 31.75 mm

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