Omron C200HX/HG/HE PLC Installation Guide

Installation environment and preparation

To ensure the long-term stable operation of the PLC system, the installation environment must meet the following conditions:

Environmental temperature: 0 ℃ to 55 ℃ during operation, -20 ℃ to 75 ℃ during storage (excluding batteries).

Environmental humidity: 35% to 85%, no condensation.

Air conditions: No corrosive gases, flammable gases, conductive dust, salt, oil mist or chemicals.

Vibration and impact: Complies with JIS C0040 standard, avoiding severe vibration or impact.

2.1 Heat dissipation and ventilation

The installation spacing between PLC racks should not be less than 70-120mm to ensure sufficient heat dissipation space and convenient wiring. When the ambient temperature inside the cabinet may exceed the specified value, a cooling fan must be installed. The rack must be installed vertically, meaning that the text direction on the panel is normal and readable, and cannot be inverted or placed flat.

2.2 Anti noise measures

To enhance the anti-interference capability of the system, the following measures should be taken:

Avoid installing PLC in control cabinets containing high-voltage equipment.

Maintain a minimum distance of 200mm between the PLC and the power cord.

The metal plate for installing the backboard should be reliably grounded.

If all racks cannot be installed on the same metal plate, wires with a cross-sectional area of not less than 2mm ² should be used to connect the metal plates together.

Hardware installation steps

3.1 Backboard installation

Use 4 M4 screws to secure the backplate to the mounting plate, with a tightening torque of 1.2N · m. For 8-slot or 10 slot backplates, if using the C200HW-PA209R power unit, a backplate with a model suffix of "- V1" (such as C200HW-BC081-V1) must be used, otherwise it may cause backplate aging or circuit burnout.

3.2 Unit Installation

When installing the unit, first insert the top of the unit into the backplane slot, and then rotate the unit downwards to align its bottom connector with the backplane. Press the yellow lock lever, push the unit into place, and then release the lock lever to ensure that the connector is securely engaged. The screws at the bottom of the CPU unit, I/O power unit, and slave unit need to be tightened with a Phillips screwdriver.

When disassembling the unit, use a screwdriver to hold down the locking rod and lift the unit upwards.

3.3 Installation of Memory Box and Communication Board

Before installing the memory box or communication board, be sure to cut off the PLC power supply. Open the front cover of the CPU unit, push the memory box or communication board into the slot in the correct direction until it is securely in place, and then close the cover plate. Inserting or unplugging while the power is on may cause CPU unit failure or memory damage.

3.4 DIN rail installation

If DIN rail installation is selected, the installation bracket should be fixed on the left and right sides of the backboard first, and then the backboard should be hung on the rail so that the bracket claws can be engaged with the upper edge of the rail. Loosen the bracket fixing screws, slide the back plate upwards to clamp the guide rail, and finally tighten the screws again. It is not recommended to use DIN rail installation in places with vibration.

Power and I/O wiring specifications

4.1 Power Wiring

4.1.1 AC power supply unit

For C200HW-PA204/PA204R/PA204C, the input voltage range is 85-264VAC, and no voltage selection is required.

For C200HW-PA204S, if 100-120VAC is used, a short-circuit rod should be used to short-circuit the voltage selection terminal; If using 200-240VAC, keep it open circuit.

The grounding terminals LG (noise filtering neutral point) and GR (protective grounding) should be grounded separately, with a grounding resistance of less than 100 Ω. When conducting insulation withstand voltage testing, the connection between LG and GR must be disconnected.

M3.5 self elevating terminals must be used for wiring terminals, and crimping terminals (M3.5) must be used with a tightening torque of 0.8N · m. It is strictly prohibited to directly connect bare stranded wires to terminals.

4.1.2 DC power supply unit

The input voltage range is 19.2-28.8VDC.

When wiring, it is necessary to confirm that the positive and negative poles are connected correctly and cannot be reversed.

To meet the requirements of the EC Low Voltage Directive, the 24VDC power supply connected to the power unit must have reinforced insulation or double insulation.

4.1.3 24VDC output (C200HW-PA204S)

This terminal can supply power to DC input units with an output capacity of 0.8A, but the total power output with 5V and 26V must not exceed 30W. The output voltage accuracy varies with the load current, and when the load current is less than 0.3A, the accuracy is+17%/-11% (batch 0197 and later). If the maximum operating voltage of the connected device is 26.4V, a virtual load resistor needs to be connected in parallel at the load end to absorb excess voltage.

4.2 I/O Unit Wiring

4.2.1 Wiring Materials and Processes

Wire specifications: It is recommended to use AWG22 to 18 (0.32-0.82mm ²) for the 10 point terminal block; It is recommended to use AWG22 (0.32mm ²) for the 19 point terminal block.