Omron SYSMAC 3G8F7-CLK12-EV1, Руководство по эксплуатации

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Backup Power Supply Wiring (Optical Ring Systems Only) Section 2-4
2-4 Backup Power Supply Wiring (Optical Ring Systems Only)
A node bypass function can be used with an Optical Ring Controller Link Sys-
tem (either H-PCF cable or GI cable) by supplying a backup power supply to
the Units and Boards. This will prevent the entire network from going down if a
node malfunctions or the power supply to the PC or computer is turned OFF.
Each node requires a backup power supply for the node bypass function.
Several nodes can be connected to a single power supply or each node can
be connected to an independent power supply. If several nodes are con-
nected to a single power supply, be sure to wire each node separately as
shown in the diagram.
2-4-1 Backup Power Supply Specifications
The input specifications for the backup power supply to the Controller Link
Unit and Support Board are described below. When providing a backup power
supply, make sure that the following specifications are satisfied.
An OMRON S82K-series Power Supply Unit is recommended.
Note 1. If connecting multiple nodes to one power supply, or if the distance be-
tween the power supply and the node is great, carefully consider the max-
imum current and voltage to satisfy the specifications described above
using the node power supply connectors and terminal positions.
2. Power supply from the backup power supply is given priority. Consider the
following points when designing a system.
a. Turn ON the backup power supply before turning ON the power supply
to the PC and computer.
b. The communications data will be corrupted in the instant when the
backup power supply is turned ON or OFF.
c. To make sure that the node bypass function is operating when the
power supply to the PC or computer is OFF, use a separate backup
power supply that is not connected to the PC or computer.
d. Always use a separate backup power supply. Do not use the same
supply as the I/O power supply, motor power cables, or control power
cables.
Optical transmission path
Bypass
Power supply
down
Computer
24 VDC
backup power supply
Item Specifications
Power supply voltage 24 VDC
Allowable power supply volt-
age fluctuation range
20.4 to 26.4 VDC (24 VDC, –15 to +10%)
Consumption current 24 VDC, 400 mA max. (per node)
Inrush current 2.5 A max. (when 24-VDC rising time is 5 ms)