3-2 Wiring. Omron C200HG-CPU43, C200HX-CPU64, C200HX-CPU65, C200HG-CPU53, C200HG-CPU33, C200HX-CPU34, C200HG-CPU63, C200HE-CPU32, C200HW-PA204S
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Wiring
4. Close the compartment covers.
Section 3-2
3-2 Wiring
3-2-1 Power Supply Wiring
AC Power Supply Units
Note 1. Do not remove the protective label from the top of the Unit before wiring. This label is to prevent wiring clippings and other foreign matter from entering the
Unit during wiring procedures.
2. After completing the wiring, remove the protective label from the top of the
Unit before starting operation. The Unit will overheat if operated with this label in place.
C200HW-PA204 or
C200HW-PA204S
Power Supply Unit
Screw (3.5 mm head with self-raising pressure plate)
Voltage selector
24-VDC output
1:1 isolation transformer
AC power source
Note The AC input terminals may
L
2
/N
L
1 be indicated as L instead of L
2
1
/N and L
2
/N and L
1
on some Units. However, there is no difference in their functions or performance.
L
1
/N
L
2
63
Wiring Section 3-2
C200HW-PA204R or
C200HW-PA209R
Power Supply Unit
Screw (3.5 mm head with self-raising pressure plate)
1:1 isolation transformer
Voltage selector
AC power source
RUN
OUTPUT
Power supply
RUN output
AC Power Source
Voltage Selector
Isolation Transformer
Current Consumption
24-VDC Output
•
Supply 100 to 120 or 200 to 240 VAC.
•
Keep voltage fluctuations within the specified range
Supply voltage
100 to 120 VAC
200 to 240 VAC
Allowable voltage fluctuations
85 to 132 VAC
170 to 264 VAC
• If one power supply phase of the equipment is grounded, connect the grounded phase side to the L
2
/N (or L
1
/N if so indicated) terminal.
Shorted: 100 to 120 VAC
Open: 200 to 240 VAC
Short-circuit the voltage selection terminals with the shorting bracket supplied as an accessory to select 100 to 120 VAC supply voltage. For 200 to 240 VAC leave them open.
Noise between the PC and ground can be significantly reduced by connecting a
1-to-1 isolation transformer. Do not ground the secondary coil of the transformer.
The current consumption will be 120 VA max. (180 VA max. with the C200HW-
PA209) per Rack, and there will be a surge current of at least 5 times the max.
current when power is turned on.
Use these terminals as the power supply for 24-VDC Input Units. Never externally short these terminals; PC operation will stop if these terminals are shorted.
These terminals are available on the C200HW-PA204S only.
Although the 24-VDC output can supply up to 0.8 A, the combined power consumption for both 5 V and 26 V must be 30 W or less, i.e., the capacity of the
24-VDC output will be reduced if the Units mounted to the Rack consume a lot of current. Refer to Appendix C Unit Current and Power Consumption for the consumption current of each Unit.
64
Wiring Section 3-2
The output voltage of the 24-VDC output will vary with the current consumption of the load as shown in the following table. Be sure to check the current consumption and allowable voltage ranges of the devices connected before using these terminals.
Less than 0.3 A 0.3 A or higher Load current on 24-VDC output
Accuracy of 24-VDC output for lot No. 0197 or later
Accuracy of 24-VDC output for lot No. 3187 or earlier
+17%
–11%
+10%
–20%
+10%
–11%
Note Lot numbers are as shown in the following diagram.
0 1 9 7
1997 (Rightmost digit of year)
September (Month: 1 to 9 = Jan to Sep, X/Y/Z = Oct/Nov/Dec
01 (Day: 01 to 31)
Connect a dummy load as shown in the following diagram if the maximum operating voltage of the connected device is 26.4 V (24 V +10%).
I
L
Dummy load
R
L
Connected device
(Photoelectric
Switch, Sensor Input Unit, etc.
24 VDC
OUTPUT
•
Resistance of the dummy load:
R=24/(0.3 – I
120
L
Ω
) ( Ω )
when I
L
= 0.1 A
240 Ω when I
L
= 0.2 A
Not necessary when I
L
= 0.3 A
(I
L
: Total current of connected devices)
• Capacity of the dummy load resistance:
W=(0.3 – I
L
) x 26.4 x 5 (Safety factor)
30 W (120
Ω)
when I
L
= 0.1 A
15 W (240
Ω)
when I
L
= 0.2 A
Note Since the dummy load will generate heat, be careful not to allow any combustible materials to come in contact with the resistor.
65
Wiring
RUN Output
Crimp Terminals
Section 3-2
These terminals turn ON whenever the CPU Unit is operating in RUN or MON-
ITOR Mode. Use these terminals under the following specifications These terminals are available on the C200HW-PA204R/PA209R only.
Model
Contact form
Maximum switching capacity
C200HW-PA204R
SPST-NO
C200HW-PA209R
250 VAC: 2 A for resistive loads
0.5 A for inductive loads
24VDC: 2 A
240 VAC: 2A for resistive loads
120 VAC: 0.5 A inductive loads
24 VDC: 2A
The terminals on the Power Supply Unit are M3.5, self-raising terminals with screws.
Use crimp terminals for wiring. Do not connect bare stranded wires directly to terminals. Tighten the terminal block screws to the torque of 0.8 N
S
m.
Use round-type crimp terminals (M3.5) having the dimensions shown below.
7 mm max.
!
Caution Tighten the terminal block screws to the torque of 0.8 N
S
m. The loose screws may result in short-circuit, malfunction, or burning.
Note 1. Supply power to all of the Power Supply Units from the same source.
2. Be sure to check the setting of the voltage selector before supplying power.
3. Do not forget to remove the label from the top of the Power Supply Unit before turn on the power supply.
DC Power Supplies
Note 1. Do not remove the protective label from the top of the Unit before wiring. This label is to prevent wiring clippings and other foreign matter from entering the
Unit during wiring procedures.
2. After completing the wiring, remove the protective label from the top of the
Unit before starting operation. The Unit will overheat if operated with this label in place.
C200HW-PD024
Power Supply Unit
Screw (3.5 mm head with self-raising pressure plate)
DC power source
Note To satisfy the EC Directives (Low-voltage
Directives), provide reinforced insulation or double insulation for the 24-VDC power source connected to the Power Supply Unit.
66
Wiring
DC Power Source
Power Consumption
Crimp Terminals
Grounding
Section 3-2
Supply 24 VDC. Keep voltage fluctuations within the specified range (19.2 to
28.8 V).
The power consumption will be 40 W max. per Rack, and there will be a surge current of at least 5 times the max. power when power is turned on.
The terminals on the Power Supply Unit are M3.5, self-raising terminals with screws.
Use crimp terminals for wiring. Do not connect bare stranded wires directly to terminals. Tighten the terminal block screws to the torque of 0.8 N S m.
Use crimp terminals (M3.5) having the dimensions shown below.
7 mm max.
7 mm max.
Do not reverse the positive and negative poles when wiring the power supply terminals.
Supply power to all of the Power Supply Units from the same source.
Do not forget to remove the label from the top of the Power Supply Unit before turning on the power supply to ensure proper heat dissipation.
For satisfying the EC Directives (Low-voltage Directives), provide reinforced insulation or double insulation for the DC power supply used for the CPU Unit.
Power Supply Unit
L
2
/N
L
1
To avoid electrical shock, attach a grounded (earth ground) AWG 14 wire (crosssectional area of at least 2 mm 2 ) to the GR terminal. The resistance to ground must be 100 Ω or less. Do not use a wire longer than 20 m. Care must be taken, because ground resistance is affected by environmental conditions such as soil composition, water content, time of year, and the length of time since the wire was laid underground.
The Line Ground (LG) terminal is a noise-filtered neutral terminal that does not normally require grounding. If electrical noise is a problem, however, this terminal should be connected to the Ground (GR) terminal.
PC operation may be adversely affected if the ground wire is shared with other equipment, or if the ground wire is attached to the metal structure of a building.
67
Wiring
Crimp Terminals
Section 3-2
When using an Expansion I/O Rack, the Rack must also be grounded to the GR terminal. The same ground can be used for all connections.
OK OK Wrong
Other devices
Other devices
Other devices
Ground to 100 Ω or less.
Ground to 100 Ω or less.
The terminals on the Power Supply Unit are M3.5, self-raising terminals with screws.
Use crimp terminals for wiring. Do not connect bare stranded wires directly to terminals. Tighten the terminal block screws to the torque of 0.8 N
S
m.
Use crimp terminals (M3.5) having the dimensions shown below.
7 mm max.
7 mm max.
3-2-2 Standard I/O Unit Wiring
Electric Wires
Crimp Terminals
!
Caution Check the I/O specifications for the I/O Units, and consider the following points.
•
Do not apply a voltage that exceeds the input voltage for Input Units or the maximum switching capacity for Output Units. Doing so may result in breakdown, damage or fire.
•
When the power supply has positive and negative terminals, be sure to wire them correctly.
Note To satisfy the EC Directives (Low-voltage Directives), provide reinforced insulation or double insulation for the DC power source connected to the DC I/O Unit.
Use a separate power source for the DC I/O Unit from the external power supply for the Contact Output Unit.
The following electric wires are recommended.
Terminal Block Connector
10-terminal
19-terminal
Electric Wire Size
AWG 22 to 18 (0.32 to 0.82 mm 2 )
AWG 22 (0.32 mm 2 )
Note The allowable current capacity of electric wiring differs depending on factors such as ambient temperature, insulation thickness, etc., so be sure to take these factors into account when selecting electric wire.
The terminals on the Power Supply Unit are M3.5, self-raising terminals with screws.
Use crimp terminals for wiring. Do not connect bare stranded wires directly to terminals. Tighten the terminal block screws to the torque of 0.8 N S m.
Use crimp terminals (M3.5) having the dimensions shown below.
7 mm max.
7 mm max.
For satisfying the EC Directives (Low-voltage Directives), provide reinforced insulation or double insulation for the DC power supply used for the I/O Units.
68
Wiring
Wiring
Section 3-2
Be sure that each Unit is securely mounted. In order to prevent wire scraps and other objects from getting inside of the Unit, keep the top-surface label on while wiring the Unit. After the wiring has been completed, be sure to remove the label in order to allow heat radiation.
During wiring After wiring
Remove the label.
Wire the Units so that they can be easily replaced. In addition, make sure that the
I/O indicators are not covered by the wiring.
Do not place the wiring for I/O Units together or in the same duct as power lines.
Inductive noise can cause errors in operation.
Tighten the terminal screws to the torque of 0.8 N S m.
The terminals have screws with 3.5-mm diameter heads and self-raising pressure plates. Connect the lead wires to the terminals as shown below.
Terminal Blocks Unlock the terminal block of an I/O Unit to remove the terminal block from the I/O
Unit. You do not have to remove the lead wires from the terminal block in order to remove it from an I/O Unit.
Locks for terminal block.
Unlock to remove the terminal block from the I/O Unit. Make sure the terminal block is locked securely after wiring is complete.
69
Wiring
I/O Unit Covers
Input Devices
DC Input Units
Section 3-2
A C200H-COV11 Cover is provided as an I/O Unit cover for Units that use 10P terminal block connectors. After the I/O wiring has been completed, slide the cover up from the bottom, as shown in the illustration below. These Covers should be applied whenever the extra protection is required.
Attach
Remove
I/O Unit cover
Observe the following information when selecting or connecting input devices.
The following types of DC input devices can be connected.
Contact output
IN DC Input Unit
COM
NPN open-collector output
+
Output
7 mA
0 V
Sensor
Power
Supply
NPN current output
+
Current regulator
Output
7 mA
0 V
Sensor
Power
Supply
PNP current output
+
Output
Sensor
Power
Supply
7 mA
0 V
IN DC Input Unit
COM
IN DC Input Unit
COM
IN AC/DC Input Unit
COM
70
Wiring Section 3-2
The circuit below should be used for I/O devices having a voltage output.
Voltage output
+
COM
Output
IN DC Input Unit
0 V Sensor
Power
Supply
The circuit below should NOT be used for I/O devices having a voltage output.
Voltage output
+
Output
Sensor
Power
Supply
IN DC Input Unit
0 V
COM
AC Input Units
Contact output
IN AC Input Unit
COM
AC Switching
Proximity switch main circuit
IN AC Input Unit
COM
Input Leakage Current
Note When using Reed switch as the input contact for an AC Input Unit, keep the allowable current to 1 A or greater. If Reed switches with smaller allowable currents are used, the contacts may fuse due to surge currents.
When two-wire sensors, such as photoelectric sensors, proximity sensors, or limit switches with LEDs, are used, the input bit may be turned ON erroneously by leakage current. In order to prevent this, connect a bleeder resistor across the input as shown below.
Input power supply
Bleeder resistor
R PC
Sensor
If the leakage current is less than 1.3 mA, there should be no problem. If the leakage current is greater than 1.3 mA, determine the resistance (R) and power rating (W) for the bleeder resistor using the following formulas.
71
Wiring
For standard I/O Units:
I = leakage current in mA
R =
W =
2.4
7.2
x I – 3 k
Ω
2.3
––– W min.
R
max.
The previous calculations are based on the following equations.
I
R
Input voltge (24)
Input current (10)
R
) Input voltage (24) v
OFF voltage (3)
Input current (10)
Section 3-2
W w
Input voltage (24)
R
Input voltage (24) Tolerance (4)
Precautions when
Connecting a Two-wire
DC Sensor
When using a two-wire sensor with a 12-VDC or 24-VDC input device, check that the following conditions have been met. Failure to meet these conditions may result in operating errors.
1, 2, 3...
1. Relation between voltage when the PC is ON and the sensor residual voltage:
V
ON x V
CC
– V
R
2. Relation between voltage when the PC is ON and sensor control output
(load current):
I
OUT
(min)
I
ON
= (V x I
ON x I
OUT
(max.)
CC
– V
R
– 1.5 [PC internal residual voltage])/R
IN
When I
ON
is smaller than I
OUT
(min), connect a bleeder resistor R. The bleeder resistor constant can be calculated as follows:
R x (V
CC
– V
R
)/(I
Power W y
(V
CC
OUT
(min.) – I
ON
– V
R
)
2
)
/R
×
4 [allowable margin]
Note The residual voltage in the PC is 4.0 V for the following Units:
C200H-ID211/ID212/IM211/IM212/INT01
The residual voltage is 1.5 V for all other Units.
72
Wiring Section 3-2
3. Relation between current when the PC is OFF and sensor leakage current:
I
OFF y I leak
Refer to Input Leakage Current later in this section for details.
The I
OFF values differ for each Unit, but is always 1.3 mA for Input Units whose OFF current specifications are not given.
R
IN
DC Input Unit
V
CC
V
ON
I
ON
I
OFF
R
IN
:
Two-wire sensor
: Power voltage
: PC ON voltage
PC ON current
: PC OFF current
: PC input impedance
V
R
R
V
CC
V
R
: Sensor output residual current
I
OUT
: Sensor control current (load current)
I leak
: Sensor leakage current
R: Bleeder resistance
Output Circuits
Output Short-circuit
Protection
If a load connected to the output terminals is short-circuited, output elements and printed boards may be damaged. To guard against this, incorporate a fuse in the external circuit.
Transistor Output Residual
Voltage
Output Leakage Current
When connecting TTL circuits to transistor Output Units, it is necessary to connect a pull-up resistor and a CMOS IC between the two. This is because of the residual voltage left on the transistor output after the output turns OFF.
If there is a possibility of leakage current causing a transistor or triac to malfunction, connect a bleeder resistor across the output as shown below.
PC
OUT
L
R
Bleeder resistor
COM
Load power supply
Determine the value and rating for the bleeder resistor using the following formula.
R
V
ON
–––
I
Where
V
ON
= ON voltage of the load in V
I = leakage current in mA
R = bleeder resistance in k
Ω
73
Wiring
Output Surge Current
Section 3-2
When connecting a transistor or triac Output Unit to an output device having a high surge current (such as an incandescent lamp), care must be taken to avoid damage to the Output Unit. The transistor and triac Output Units are capable of withstanding a surge current of ten times the rated current. If the surge current for a particular device exceeds this amount, use the circuit shown below to protect the Output Unit.
PC
OUT
COM
R
L
+
Another way of protecting the Output Unit lets the load draw a small current
(about one third the rated current) while the output is OFF, significantly reducing the surge current. This circuit (shown below) not only reduces the surge current, but also reduces the voltage across the load at the same time.
R
OUT L
+
PC
COM
3-2-3 Electrical Noise
I/O Signal Lines
Whenever possible, place I/O signal lines and power lines in separate ducts or tubes. If placing them together cannot be avoided, use shielded cable to minimize the effects, and connect the shielded end to the GR terminal.
1 = I/O cables
2 = Power cables
Suspended duct
In-floor duct Conduits
74
Wiring Section 3-2
Inductive Load Surge Suppressor
When an inductive load is connected to an I/O Unit, it is necessary to connect a surge suppressor or diode in parallel with the load as shown below. This is so that the back EMF generated by the load will be absorbed.
IN
L Diode DC input
COM
L
OUT
Contact Output Unit
Triac Output Unit
Surge suppressor
COM
OUT
L
Contact Output Unit
Transistor Output Unit
+
Diode
COM
Note Use surge suppressors and diodes with the following specifications.
Surge Suppressor
Resistance:
Capacitor:
Voltage:
Diode
50 Ω
0.47
200 V
µ F
Leading-edge peak inverse voltage:
Average rectified current:
At least 3 times load voltage
1 A
75
Wiring
External Wiring
Interlock Circuits
Section 3-2
If power cables must be run alongside the I/O wiring (that is, in parallel with it), at least 300 mm must be left between the power cables and the I/O wiring as shown below.
Low current cable
1
Control cable
2
300 mm min.
Power cable
3
300 mm min.
Class-3 ground
Where: 1 = I/O wiring
2 = General control wiring
3 = Power cables
If the I/O wiring and power cables must be placed in the same duct (for example, where they are connected to the equipment), they must be shielded from each other using grounded metal plates.
Metal plate (iron)
200 mm min.
1 2 3
Class-3 ground
Where: 1 = I/O wiring
2 = General control wiring
3 = Power cables
When the PC controls an operation such as the clockwise and counterclockwise operation of a motor, provide an external interlock such as the one shown below to prevent both the forward and reverse outputs from turning
ON at the same time.
Interlock circuit
MC2
00501
MC1 Motor clockwise
PC
MC1
00502
MC2 Motor counterclockwise
76
Wiring
Power Interruptions
Section 3-2
This circuit prevents outputs MC1 and MC2 from ever both being ON at the same time. Even if the PC is programmed improperly or malfunctions, the motor is protected.
A sequential circuit is built into the PC to handle power interruptions. This circuit prevents malfunctions due to momentary power loss or voltage drops. A timing diagram for the operation of this circuit is shown below.
The PC ignores all momentary power failures if the interruption lasts no longer than 10 ms (no longer than 2 ms for a DC Power Supply). If the interruption lasts between 10 and 25 ms (between 2 and 5 ms for a DC Power Supply), the interruption may or may not be detected. If the supply voltage drops below 85% of the rated voltage for longer that 25 ms (less for the DC Power Supply), the PC will stop operating and the external outputs will be automatically turned OFF.
Operation is resumed automatically when the voltage is restored to more than
85% of the rated value. The diagram below shows the timing of PC operation and stopping during a power interruption. The time it takes to detect the power failure is shorter when the power supply is DC. Also, the voltage value for which the C200HX/HG/HE will stop due to a drop in the power supply voltage will be lower than that for AC.
Power interrupted
Power restored
Power supply
Time lapse until detection
Power failure detection signal
+5 V
CPU Unit operating voltage
Power supply reset
77
SECTION 4
Programming Console Operation
This section describes the function of the Programming Console and its connection methods.
4-1 Using the Programming Console
4-1-1 Nomenclature
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-1-2 Connecting the Programming Console . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
4-2 Checking Initial Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
80
80
81
82
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