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Specific Example Section 2-2
2-2 Specific Example
1,2,3... 1. Determine the MULTIPLE I/O TERMINAL I/O specifications.
Each Communications Unit for the MULTIPLE I/O TERMINAL can be con-
nected to a combined total of 1,024 input and output points (64 words)
max. (This figure does not include the 2 words of the input area allocated
to the I/O Unit interface status.)
In this example, the following configuration will be used:
• Inputs: 16 points
• Outputs: 16 points
• Analog Input: 8 inputs (8 words)
• Analog Output: 4 outputs(4 words)
2. Select the I/O Units.
• DRT1-COM Communications Unit: 1 Unit
• GT1-ID16 Transistor Input Unit, 16 points with terminal block: 1 Unit
• GT1-OD16MX Transistor Output Unit, 16 points with connector:1 Unit
• GT1-AD08MX Analog Input Unit, 8 inputs: 1 Unit
• GT1-DA04MX Analog Output Unit: 4 outputs: 1 Unit
3. Check the specifications.
• Check that the total number of input and output points (words) is less
than 1,024 (64). In this example, the number of points is calculated as
follows:
Inputs (16 points) + Outputs (16 points) + Analog Input (8 words x 16
points) + Analog Output (4 words x 16 points)
= 224 points
Note There are DeviceNet Master Units that have restrictions on the num-
ber of input and output points per Slave Unit. Make sure that the
number of input and output points does not exceed the limit for the
Master Unit. (For example, the C200HW-DRM21-V1 has an upper
limit of 512 for both input and output points.) The maximum number
of input and output points for the Master Unit, includes the 2 words
allocated to the I/O Unit interface status. When calculating the total
number of input and output points, be sure to include this (32 points)
in the calculation.
• Check that the total I/O Unit interface current consumption is less than
0.4 A. In this example, the total is calculated as follows:
Transistor Input Unit (35 mA) + Transistor Output Unit (35 mA) + Ana-
log Input Unit (50 mA) + Analog Output Unit (50mA)
=170 mA
4. Mount and connect the Communications Unit and I/O Units.
• Mounting on the DIN Track
Communications
Unit
Transistor Input Unit:
Transistor Input Unit
with terminal block
with connector
Analog Input Unit
Analog Output Unit
DIN track
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