Be sure to read before handling. Refer to back page 1 for Safety Instructions. PC Wiring System Precautions 1 Series PCW Caution Operating Environment Caution Maintenance & Inspection 1. This product is intended for use in general FA equipment. Avoid using this product in machinery or equipment which directly affects human lives or where malfunction or failure can cause extended damage. 2. Do not disassemble this product for repair or rebuilding. 1. Do not drop or bump. Do not drop, bump or apply excessive impacts (500 m/s2 or more) during handling. The PC wiring system unit can be damaged and connected equipment may malfunction. 2. Be careful of incorrect wiring. Incorrect wiring may result in damage to connected equipment. The power supply will be short circuited if inputs and outputs are connected incorrectly for the 8 point/16 point input/ output units following a branch unit. 3. Do not wire with power lines or high voltage lines. To prevent the intrusion of noise and surge from power and high voltage lines into signal lines, perform wiring for the PC wiring system separately (separate conduits) from power lines and high voltage lines. 4. Confirm proper insulation of wiring. Faulty insulation (crossed wiring, insulation defects between terminals, etc.) may result in damage to connected equipment, due to the application of excessive voltage or current flowing to the equipment. 5. Tighten screws with the proper tightening torque. If tightened beyond the tightening torque range, the terminal block and screws may be damaged. 6. Avoid subjecting cables to repeated bending or pulling forces. Wiring installations which result in repeated bending stress and pulling force on cables can cause broken wires. 7. Note that the disposition of I/O addresses differs for each PLC manufacturer. General purpose label sets (applicable to all manufacturers) are included, which can be cut as needed and inserted into the terminal label holders. 8. Operate within the rated current. The maximum current capacity for the power supply line on circuit boards of all units is 2.0 A. If the current passing through units such as the branch unit and input/output unit exceeds 2.0 A, connect the power supply line to the same power supply terminal and do not allow current to pass through the circuit board. Operation Caution Mounting, Adjustment & Wiring Warning 1. Confirm the specifications. Use properly after confirming the specifications. Operation outside the range of specifications (voltage, ambient temperature, impact, etc.) can cause damage, malfunction or fire. 2. Ensure sufficient clearance for maintenance activities. When designing an application, be sure to allow sufficient clearance for maintenance and inspections. 1. To prevent unintended malfunctioning, perform maintenance regularly. Unintended malfunctioning and misoperation may result in an inability to ensure safety. 2. Do not touch the terminals or internal boards when current is being suplied. Touching terminals or internal boards when current is being suplied may result in malfunctioning or damage with the PC wiring system unit or connected equipment, or electric shock. 1. Absolutely do not use in an atmosphere with explosive gas. The PC wiring system is not an explosion-proof construction. Never use in an atmosphere with an explosive gas since this may cause a serious explosion. 2. Do not use in an environment with temperature cycles. Temperature cycles other than found with normal temperature changes may adversely affect the PC wiring system unit. 3. Do not use in an area where surges are generated. If there are devices or equipment that generate large surges (magnetic lifter, high-frequency induction furnace, motor, etc.) near the connected equipment or PC wiring system unit, the connected equipment may deteriorate or be damaged. Consider appropriate measures for any source of power surges and take care with crossed lines. 4. Keep wire scraps and other extraneous material from getting inside this product. This can cause fire, failure or malfunction, etc. Keep wire scraps and other extraneous material from getting inside this product. 5. Use with consideration for an operating environment with a protective structure. Avoid using the PC wiring system unit where water or oil is splashed. Design & Selection Caution 604 A