欧姆龙PLC操作手册_c20p_c28p_c40p_c60p(6)

Dimensions and InstallationSection 2-3

Horizontal Mounting

Vertical Mounting

20

Another factor to consider is the I/O wiring (see 2-6 I/O Wiring). If the CPUand/or Expansion I/O Units are mounted vertically, a minimum of 70 mmopen space is required for ease of I/O wiring. The spacing of the mountingholes, for both vertical and horizontal mounting is as shown below.

5Four, M4Two, M4BF–10Four, M4BDCCPUExpansionAnalog I/O UnitTimer UnitA ± 0.2FA ± 0.2GA ± 0.2EBTwo, M4110 ± 0.2HC4KC ± 0.2DI/OLink230250FA ± 0.2Unit120Two, M45Four, M4BDCCPUC ± 0.2I–10IDExpansionI/O UnitA + 0.2I–10I230I/OLink230UnitTwo, M4110 ± 0.2120I/O Connecting Cable

ModelCPU

C20PC28P

I/O Unit

C40PC60P

I/O Unit

C16PC4K

Analog TimerUnitF15 to 40

C4K-TM

A±0.2B2402402903401453131

2502503003501554040

C±0.2D100100100120100100100

110110110140110110110

E55515555

Section 2-4

G15 to 35

H20 to 40

I80 to 130

Attach End Plates (PFP-M) to both ends (as shown below) when connectingCPUs, Expansion I/O Units, or Analog Timer Units to a DIN Rail. It is alsorecommended that a Spacer (PFP-S) be installed between a CPU and Ex-pansion I/O Unit when they are mounted horizontally.

10PC5I/O Unit10XXEnd plateDIN RailSpacerEnd plateMounting screws are included with CPUs, Expansion I/O Units, and AnalogTimer Units. They must be purchased separately for I/O Link Units.

2-4I/O Connecting Cable

Applicable connecting cable will vary according to which Units are connectedand whether they are mounted horizontally or vertically. All Expansion I/OUnits except the C16P and C4K use C20P-CN501 cable (5 cm) for horizontalmounting and C20P-CN411 cable (40 cm) for vertical mounting. The C16Pand C4K cannot be mounted vertically. The C16P can use either of theabove-mentioned cables for horizontal mounting. The C4K can use onlyC4K-CN502 cable (5 cm). For connecting I/O Link Units, use C20P-CN711cable (70 cm).

CautionAlways be sure to use only the cable that is included with the Unit. Using the

wrong cable (such as the C20 I/O Connecting Cable or I/O Link ConnectingCable) for connecting Expansion I/O Units can cause serious damage to theUnits.

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I/O Connecting CableConnecting Analog TimerUnits

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Section 2-4

The following diagrams illustrate the appropriate cables for connecting CPUs,Expansion I/O Units, and I/O Link Units either horizontally or vertically.

Horizontal Mounting

5 to 30 cmCPUI/O UnitI/O LinkUnit

I/O Connecting Cable C20P-CN501I/O Link ConnectingCable C20P-CN711

Vertical Mounting

I/O Link ConnectingCable C20-CN711CPUI/O Link100 to 200mmUnitI/O UnitI/O ConnectingI/O UnitCable C20P-CN411I/O Link100 to 200mmUnitCPUI/O Link ConnectingI/O Connecting Cable C20P-CN711

Cable C20P-CN411

One Analog Timer Unit can be connected directly to a CPU or to any combi-nation of a CPU and Expansion I/O Units. In either case, as shown in the fol-lowing diagram, the Units must be mounted horizontally.

Analog Timer Unit

CPUConnecting CableC4K-CN502Analog Timer UnitCPUI/O UnitConnecting CableC4K-CN502

I/O Connecting Cable

Connecting I/O Link Units

Section 2-4

One I/O Link Unit can be connected directly to a CPU or to any combinationof a CPU and Expansion I/O Units. It cannot be used in the same PC Systemwith an Analog Timer Unit.

Follow these four steps to connect Expansion I/O Unit, Analog Timer, and I/OLink Unit Connecting Cables.

Remove the connector cover from the CPU, using a screwdriver if nec-essary.

Insert one of the cable’s connectors into the cover. (Once inserted, theconnector cannot be removed.)

Reinsert the cover/connector combination into the CPU.Repeat this procedure on the other end of the cable.

Connection Procedure

1, 2, 3...1.

2.3.4.

Cover

Optical Fiber Cable

Optical fiber cable can be used for extending transmission distance and re-ducing noise. There are three types, and the appropriate cable for any givensituation will depend on the desired transmission distance and the particularUnits which need to be connected.

All-plastic optical fiber cable (APF) is for short-distance transmission (up to20 m) and can be used only by Units with the suffix “-P” attached. Plas-tic-clad optical fiber cable (PCF) is for middle-distance transmission (up to200 m for Units with “-P” and 800 m for Units without “-P”). Crystal opticalfiber cable (AGF) is for long-distance transmission (up to 3 km) and can beconnected only to certain Link Adapters.

Although laying optical fiber cable does not basically differ from laying wirecable, there are certain precautions which should be observed. For details,refer to the Optical Remote I/O Systems Manual.

Link Adapters

Although it is normally possible to connect Units in series, a failure (powerfailure, disconnection, etc.) in one of the Units will cause all the subsequentUnits to cease operating. You can use Link Adapters to prevent this type ofsituation from occurring. Even if a power failure occurs in a Unit connected toa branch line of a Link Adapter, the Link Adapter will bypass that Unit andcontinue to transmit signals to the other Units. You can also use Link Adapt-ers for branching and for converting between various types of wire and opti-cal cable. For details on these and other functions of Link Adapters, refer tothe Link Adapter Manual.

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Wiring CPUs and Expansion I/O UnitsSection 2-5

2-5Wiring CPUs and Expansion I/O Units

Use a commercially available 24-VDC, 100 to 120-VAC, or 200 to 240-VACPower Supply

Wiring

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power supply (depending on your model) for the CPU. When an ExpansionI/O Unit(s) or an I/O Link Unit is used, the power supply must also be con-nected to each of these Units. Where possible, use independent powersources for the inputs, the output loads, and the CPU. All of the CPUs andExpansion I/O Units may be connected to the same power source. If a CPUand an Expansion I/O Unit are connected to separate power supplies, thenthe CPU (as well as the Programming Console, etc.) will not operate unlesspower is turned on to the Expansion I/O Unit.

The following diagram illustrates the proper wiring for CPUs and ExpansionI/O Units with the suffix “-A.” These models use a power supply of 100 to 240VAC, with an operating voltage range of 85 to 264 VAC. The internalnoise-reduction system in these Units is sufficient for general power linenoise, but ground noise can be greatly reduced by using a 1:1 insulating

transformer. Ground only the primary side of the transformer. To prevent volt-age drop, use wires 2 mm2 or less in cross sectional area, twisting them asshown in the diagram. When power is turned on, the incoming current will beapproximately 10 A.

Insulating transformer1:1

Breaker

M3.5 screws

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