CRT1-ROS16 Omron, CRT1-ROS16 Datasheet - Page 122
![no-image](/images/manufacturer_photos/0/4/494/omron_sml.jpg)
CRT1-ROS16
Manufacturer Part Number
CRT1-ROS16
Description
16-point Relays Outputs
Manufacturer
Omron
Datasheet
1.CRT1-ATT03.pdf
(675 pages)
Specifications of CRT1-ROS16
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
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Power Supply Wiring
3-5-6
Supplying I/O Power
from One Source
98
Precautions when Providing the I/O Power Supply
■
Power
supply,
24 VDC
Master
Unit
Calculation Example
The allowable power supply voltage range for Slave Units is 14 to 26.4 VDC. If
a 24-VDC power supply is used, the allowable voltage drop is 10 V.
The extended length of cable that can be used is expressed by the following
formula:
To provide leeway when selecting the cable, use the following formula.
R = Cable conductor resistance = 0.025 Ω/m for Flat Cable
Therefore the length that the cable can be extended is as follows:
When installing a system, the supply methods for communications power and
I/O power must be considered. Not only hardware, such as selecting the
power supplies and cables based on allowable currents and voltage drop, be
considered, but also system operation for power supply errors, costs, and
other software issues must be considered when studying power supply meth-
ods.
When supplying I/O power to the entire system from one source, the power
consumed by each device and all the loads must be considered. Select the
cables so that the power supply voltage for the last Slave Unit and load will be
within the allowable range.
Also, give proper consideration to the power supply capacity and be sure the
total line current is within the allowable current range of the cable.
The following measures can be considered to keep the voltage drop within the
allowable range when supplying power from one power supply.
+ … + I
10 (V) ≥ {(I
10(V) ≥ {(I
L (m) ≤ 200 ÷ (I
• Increase the thickness of the power supply cables.
• Increase the output voltage of the power supply.
• Shorten the wiring.
• Locate the power supply in the middle of the network.
n
) × R
3 m max.
1
1
+ I
+ I
L
3
1
2
2
× L
1
+ I
+ I
Slave Unit
current con-
sumption I
+ I
3
3
3
2
× 2} + … + {I
+ … + I
+ … + I
+ I
3
1
+ … + I
L
n
2
n
) × R × L × 2}
) × R
Slave Unit
current con-
sumption I
n
n
1
× R
) … For Flat Cable
× L
n
1
2
× L
× 2} + {(I
L
3
n
× 2}
Slave Unit
current con-
sumption I
2
+ I
3
3
+ … + In) × R
Slave Unit
current con-
sumption I
L
n
2
Section 3-5
× L
n
Terminating
Resistor
2
× 2} + {(I
3
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