20
Wiring the GRT1-PRT
Section 2-3
2-3
Wiring the GRT1-PRT
2-3-1
Connecting the SmartSlice I/O System Power Supply
The PROFIBUS Communication Unit has two sets of power supply terminals
for the following two systems.
Both the SmartSlice I/O System power supply and the external I/O power sup-
ply are connected with screwless clamping-type terminals.
Evaluating the Power
Supply Requirements
Unit Power Supply
The maximum power consumption for SmartSlice I/O Units is 80 W per block.
1,2,3...
1.
Calculate the power consumption of all of the SmartSlice I/O Units con-
nected to the PROFIBUS Communication Unit. Refer to the
GRT1 Series
SmartSlice I/O Units Operation Manual
(W455) for the power value for
each SmartSlice I/O Unit.
2.
If the power consumption exceeds 80 W, mount a Right Turnback Unit
(GRT1-TBR) on the SmartSlice I/O Unit at the point where the power con-
sumption is less than 80 W.
3.
Connect the 24 VDC Unit power supply to the Left Turnback Unit (GRT1-
TBL).
Note
1.
The GRT1-TBL is equipped with separate power supply terminals for the
Unit power supply and I/O power supply.
2.
When dividing the power supply, always wire (supply) the power from the
same power supply (Refer to the
Wiring Example
).
I/O Power Supply
The maximum I/O current consumption is 4 A.
1,2,3...
1.
Calculate the total current consumption used by all external I/O of the con-
nected SmartSlice I/O Units (including other Units like Turnback Units).
Refer to the
GRT1 Series SmartSlice I/O Units Operation Manual
(W455)
for the current value for each SmartSlice I/O Unit.
2.
If the current consumption exceeds 4 A or you want to provide separate
systems for inputs and outputs, divide the SmartSlice I/O Units at the de-
sired point with a GRT1-PD2 I/O Power Supply Unit and provide a sepa-
rate external I/O power supply.
3.
It is also possible to provide a separate external I/O power supply at a Left
Turnback Unit (GRT1-TBL).
Note
1.
The GRT1-TBL is equipped with separate power supply terminals for the
Unit power supply and I/O power supply.
2.
Always use isolated power supplies for the power supplies.
3.
Power is not supplied through the GCN2-100 Turnback Cable.
(Refer to the
Wiring Example
.)
Power supply
terminals
Description
Unit power supply
terminals
These terminals supply power to the PROFIBUS Communica-
tion Unit’s internal circuits as well as the connected Smart-
Slice I/O Units’ internal circuits (supplied through the
SmartSlice bus).
I/O power supply ter-
minals
These terminals supply power to the external I/O that is con-
nected to the System’s SmartSlice I/O Units.
Содержание GRT1 - 27-11-2006
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Страница 2: ...SmartSlice GRT1 Series GRT1 PRT PROFIBUS Communication Unit Operation Manual Revised November 27 2006 ...
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