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Power Supply Wiring Section 4-4
Network Power
Supply
The communications power and the I/O power are supplied together. That is
there is no need to supply power to Units separately. The power is supplied
commonly through the communications power supply connector on the Mas-
ter Unit or through the downstream port of communications power supply con-
nector on the Repeater Unit. Bit Slave Units have Flat Cables attached.
4-4-1 Connecting the Communications Power Supply
The communications power supply must meet the following specifications.
Commercially available power supply units can be used. An OMRON S82-
series Power Supply Unit is recommended to supply communications power
to a CompoNet network.
Note With the Slave Units with a network power supply, the external I/O devices are
also supplied power through the communications power supply connected to
the Master Unit or a Repeater Unit via Flat Cables. Therefore, the output cur-
rent of communications power supply must include the current consumption
and the actual load current of the external I/O devices the calculation.
The following is a calculation example of the current consumption for a Bit
Slave Unit's communications power supply.
1. Input Units
Master Unit or
Repeater Unit
BS+
BDH
BDL
BS-
BS+
BS-
BS
+
BD
H
BD
L
BS
-
Overcurrent protection
(current limit: 4 A)
Communications power supply connector on Master Unit
or downstream port's communications power supply connector on Repeater Unit
Round Cable II, Flat
Cable I, or Flat Cable II
When complying with UL standards,
install a device to limit the current
between the external power supply
and the Unit to 4 A or less for the
communications power supply.
Communications
power supply
and I/O power
supply (shared)
24 VDC
Item Specification
Output voltage 24 VDC ±10%
Output ripple 600 mVp-p
Output current Use a power supply that has a capacity equivalent or exceed-
ing the following total current consumption:
• The current consumption of all of Word Slave Units and
Repeater Units, and
• The current consumption of all of Bit Slave Units and the
external I/O devices
Insulation Between outputs and AC power, and between outputs and
enclosure grounding
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