Chapter 1 Before Turning on the PowerComputer module C2PU37 User’s Manual6Follow the precautions described below for the installation of the board housing themodel 2000:(1) House in a dust proof control board because the module itself is not dust proof.(2) Avoid installing on top of devices that emit considerable amount of heat (such asheater, transformer, or large resistor).(3) Do not install inside the same board with high voltage equipment.(4) Maintain a distance of at least 200mm from high voltage or power line.(5) Provide a space of at least 70mm around the base for ventilation.(6) Keep away from high voltage equipment and power equipment or provide metalshielding for safety during maintenance and operation.(7) Be careful not to drop foreign objects such as loose wires inside the module orunit.(8) Always mount the base on a vertical panel with the power supply module on theleft. C2 cannot be used in a horizontal position.(9) Use M4 size screws to mount the unit and fasten securely (recommended torque:1.47N=15kgf • cm).The unit mounting dimensions are as follows:Model a [mm] b [mm] c [mm] Weight [g]BU648E 402.5 95 – 900BU643D 224.5 95 203.0 850BU610 155.5 95 – 400[Note] No hole for BU643Db4 - M4ac*1