Omron E5C User Manual page 10

Precautions for Safe Use
• When executing self-tuning, turn ON power for the load (e.g., heater) at the same time as or before
supplying power to the Digital Controller. If power is turned ON for the Digital Controller before turning
ON power for the load, self-tuning will not be performed properly and optimum control will not be
achieved.
• A switch or circuit breaker must be provided close to Digital Controller. The switch or circuit breaker
must be within easy reach of the operator, and must be marked as a disconnecting means for Digital
Controller.
• Wipe off any dirt from the Digital Controller with a soft dry cloth. Never use thinners, benzine, alcohol,
or any cleaners that contain these or other organic solvents. Deformation or discoloration may occur.
• Design the system (e.g., control panel) considering the 2 seconds of delay in setting the Digital
Controller's output after the power supply is turned ON.
• The output will turn OFF when you move to the Initial Setting Level. Take this into consideration when
performing control.
• The number of non-volatile memory write operations is limited. Therefore, use RAM write mode when
frequently overwriting data, e.g., through communications.
• Use suitable tools when taking the Digital Controller apart for disposal. Sharp parts inside the Digital
Controller may cause injury.
• For compliance with Lloyd's standards, the E5CC, E5CC-U, E5EC, and E5AC must be installed under
the conditions that are specified in Shipping Standards.
• Do not exceed the communications distance that is given in the specifications and use the specified
communications cable.
• Do not turn the power supply to the Digital Controller ON or OFF while the USB-Serial Conversion
Cable is connected. The Digital Controller may malfunction.
• Do not bend the communications cables past their natural bending radius. Do not pull on the
communications cables.
• For the E5DC, when you attach the Main Unit to the Terminal Unit, make sure that the hooks on the
Main Unit are securely inserted into the Terminal Unit.
• For the E5CC-U, when you attach the Main Unit to the socket, make sure that the hooks on the
socket are securely inserted into the Main Unit.
• Install the DIN Track vertically to the ground.
• For the E5DC, always turn OFF the power supply before connecting the Main Unit to or disconnecting
the Main Unit from the Terminal Unit, and never touch nor apply shock to the terminals or electronic
components. When connecting or disconnecting the Main Unit, do not allow the electronic
components to touch the case.
8 E5@C Digital Temperature Controllers User's Manual (H174)