24
Design and Operating Procedure Examples Section 1-6
Types of Cables Flat Cable is used in this example, because IP20 Bit Slave Units are used and
the communications power supply is provided collectively through the commu-
nications cables.
Item
Cable type
Round Cable I Round Cable II Flat Cable I Flat Cable II
Application Wiring the Slave Units between the Master Unit and a Repeater Unit and
wiring the Slave Units downstream from a Repeater Unit
•To wire with
commercially
available cable.
• To supply com-
munications
power sepa-
rately.
• When Bit Slave
Units are not
used.
• To wire with
commercially
available cable
• To supply the
communica-
tions power col-
lectively via the
communica-
tions cable.
• When Bit Slave
Units are not
used.
• To use the com-
munications
cable and the
communica-
tions power to
supply power to
all Slave Units.
• When an IP20
Bit Slave Unit is
used.
• To use the com-
munications
cable and the
communica-
tions power to
supply power to
all Slave Units.
• When an IP54
Bit Slave Unit is
used.
• To use in an
environment
conforming to
IP54 (splash-
proof and drip-
proof.)
Applicable
Slave Units
Word Slave Units Supported
Bit Slave
Units
IP20 Bit
Slave
Units
Not supported. (See note.)
Note Round Cables cannot be used
with Bit Slaves. Flat Cables
are pre-connected to all Bit
Slaves.
Supported Not supported
IP54 Bit
Slave
Units
Not supported Supported
Communications power supply Wired separately
from the commu-
nications cable.
Supplied via communications cable. (Power is supplied
from the Master Unit and Repeater Units.)
Condition to use different types of
cables together
When a Repeater Unit is used, two different types of cables can be used
(two of Round Cable I, Round Cable II, Flat Cable I, and Flat Cable II): one
for the upstream port and the other for the downstream port.
In other cases, all cables on the trunk line, a sub-trunk line, a branch line, or
a sub-branch line must be the same type.
Master Unit position Only at the end of
trunk line
At baud rate of 93.75 kbps: Anywhere in the network
At other baud rates: Only at the end of trunk line
Branch lines At 4 Mbps: Not
supported
At other baud
rates: Supported
At 93.75 kbps: Unrestricted wiring
At 4 Mbps: Not supported
At other baud rates: Supported
Branching from
branch lines
Multi-wiring
Multidrop connections
on branch lines
At 1.5 Mbps:
Supported (up to
3 connectors per
branch line)
At 93.75 kbps: Unrestricted wiring
At 1.5 Mbps: Supported (up to 3 con-
nectors per branch line)
Not supported
Sub-branch lines Not supported At 93.75 kbps: Unrestricted wiring
At 1.5 Mbps: supported (up to 3 connectors per branch
line)
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