Installation and Wiring

10.1 Installation

10.1.1 Installation Environment

This equipment has a high reliability regardless the installation environment. However, cares should be taken for the following items in order to secure the reliability and stability.

1) Environment Condition

(1) Install in control panel with water-proof and vibration-proof.

(2) Free from impact or vibration.

(3) Do not expose directly to the sun.

(4) No condensing by sudden temperature change.

(5) Ambient temperature : 0 ~ 55°C.

(6) Incremental Humidity : 5 ~ 95% .

(7) Free from corrosive gas or inflammable gas 2) Installation Construction

(1) In case of processing of screw hole or wiring, do not enter the wiring fragments into PLC.

(2) Select the installation place good for operation.

(3) Do not install the equipment in the same panel with high voltage device.

(4) Keep more than 50mm from wiring duct or surrounding module.

(5) Grounding at the place where surrounding noise environment is good.

3) Heat Protection Design of Control Panel

(1) In case that PLC is installed in the airtight control panel, the heat protection design shall be carried out considering radiation of other equipment as well as the heat of PLC itself. In case of air circulation using the vent or general fan, PLC system may be influenced by the flow of dust or gas etc.

(2) It is recommended to install a filter or use the airtight heat exchanger.

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The following shows the method to calculate the current consumption of PLC system itself necessary for heat protection design.

4) Current Consumption Block Diagram of PLC System

5) Current Consumption of Each Part

(1) Current Consumption of Power Module

Current conversion efficiency of power module is about 70% and 30% is consumed by the radiation, and 3/7 of output power shall be a current consumption itself. Accordingly, the calculation formula is as below.

• W^pw = 3/7 {(I5V X 5) + (I24V X 24)} (W)

I^5V : Current consumption of DC5V circuit of each module (internal current consumption)

I24V: Average current consumption of DC24V of output module (current consumption of simultaneous On point)

Not available in case that DC24V is supplied from outside or power module without DC24V output is used.

(2) Sum of DC5V circuit current consumption

DC5V output circuit current of power module is the sum of current consumption of each module.

• W5V = I5V X 5 (W)

(3) DC24V Average current consumption (current consumption of simultaneous On point) DC24V output circuit average current of power module is the sum of current consumption of each module.

• W^24V = I^24V X 24 (W)

(4) Average current consumption by output voltage drop of output module (current consumption of simultaneous On point)

• W^out = I^out X V^drop X output point X simultaneous On rate (W) Iout : output current (current in actual use) (A)

Vdrop: voltage drop of each output module (V) Power CPU

Constant voltage transformer AC power

100V~240V

COM. COM. OUT IN SPE DC5

DC24

Load

I ^out I ⁱⁿ I 5V

I ^24V

AC power 100V~240V DC power

24V

(5) Input average current consumption of input module (current consumption of simultaneous On point)

• Win = lin X E X input point X simultaneous On rate (W) Iⁱⁿ: Input current (actual value in case of AC) (A) E: Input voltage (voltage in actual use) (V) (6) Current consumption of Special module power

• W^S = I^5V X 5 + I^24V X 24 + I^100V X 100 (W)

As above, the value that added the current consumption calculated per each block is total current consumption of PLC system.

•W = WPW + W5V + W24V + Wout + Win + Ws (W)

Calculate the radiation amount according to this total current consumption (W) and review the temperature rising in control panel.

The calculation formula of temperature rising in control panel is shown as below.

T = W / UA [°C]

W : Total current consumption of PLC system(the value obtained on the above A : Surface area in control panel [m²]

U : In case of making the temperature in control panel by fan etc. - - 6 In case that the air in control panel is not circulated- - - 4

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10.1.2 Handling Precautions

Here describes the notices in handling from the opening of each module to installation.

• Do not fall or apply the deep impact.

• Do not remove PCB from the case. It may cause the failure.

• Cares should be taken so that foreign materials such as wiring fragments are not entered into the upper part of module. If entered, remove it.

1) Notices in Handling I/O Module

Here describes the notices for the cases of handling or installing I/O module.

(1) Recheck of I/O module specification

For input module, you must consider input voltage and for output module, if the voltage exceeding max. open/close capacity is applied, it may cause the failure, destroy or fire.

(2) Use cable

Cable shall be selected considering ambient temperature and allowable current and min. spec. of cable should be more than AWG22(0.3mm²).

(3) Environment

In case of wiring I/O module, if it is too close to the equipment with high heat or the wiring is directly touched to the oil for a long time, it may cause the short circuit or occur the breakage or abnormal operation.

(4) Polarity

For the module having the polarity in terminal block, it is required to check the polarity before applying the power.

(5) Wiring

• In case of wiring that I/O wiring is carried out with high voltage cable or power cable, it may occur the inductive disturbance which result in abnormal operation or failure.

• Do not allow the cables to pass in front of I/O operation indicator (LED).

(It is not possible to distinguish I/O indicator correctly.)

• In case that the inductive load is connected to output module, connect the surge absorber or diode to the load in parallel. The cathode of diode shall be connected to (+)pole of power.

OUT

COM Output Module

Inductive load

Surge absorber

OUT

COM Output Module

Inductive load

Diode

+ -

(6) Terminal Block

Check the compression state of terminal block and pay attention not to enter the fragments of cable into PLC in case of wiring of terminal block or processing the screw hole. If not, it may cause the abnormal operation or the failure.

(7) Except the examples above, do not apply deep impact to I/O module or remove PCB board from the case.

2) Notices in Attaching Base

Here describes the notices in case of attaching PLC to the control panel.

(1) Keep the distance enough between the upper part of module and the structures or parts in order to make a ventilation good and change the module easily.

(2) Avoid the longitudinal connection or horizontal attachment considering a ventilation.

(3) Use the panel different from the vibration sources of large sized electronic contactor or no fuse breaker etc., or keep the clearance when installing.

(4) Install the wiring duct if necessary. But cares should be taken for the following notices in case the dimension of the upper or lower part of PLC is smaller than that of Figure 10.1.

• In case of installing on the upper part of PLC, keep the height of wiring duct less than 50mm for good ventilation. And keep the distance from the upper part of PLC enough to press the hook on the upper part of Base.

• In case of installing on the lower part of PLC, consider the connection of optical cable or coaxial cable and minimum radius of cables.

(5) PLC should be installed to the direction as shown on the following Figure for good ventilation against radiation.

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