RAD Data comm ASMI-450 ASMi-450 Configuration Information, General, Opening ASMi-450 Case

Installation

	2.4 ASMi-450 Configuration Information
General	This paragraph provides information on the functions of the internal jumpers
	and switches, to help in the selection of the correct setting for particular
	application, and gives step-by-step instructions for performing the internal
	settings. The default settings are also listed.
	All the other configuration actions can be performed from the front panel or from
	a control terminal, after the installation is completed. Information and detailed
	instructions for these operations appear in Chapters 3 and 4, respectively.
	Prior to ASMi-450 installation, it is necessary to check the positions of its
	internal jumpers and switches. If necessary, change the settings in accordance
	with the specific requirements of your application.
	Warning - Electrical Shock Hazard

Opening ASMi-450 Case

Access to the inside of the unit is permitted only to qualified and authorized service personnel.

Disconnect the unit from the power line and from all the cables before removing cover.

Line voltages are present inside the ASMi-450 when it is connected to power and/or to the lines. Moreover, under external fault conditions dangerous voltages may appear on the lines connected to the ASMi-450. Any adjustment, maintenance, and repair of the opened instrument under voltage should be avoided as much as possible and, when inevitable, should be carried out only by a skilled technician who is aware of the hazard involved. Capacitors inside the instrument may still be charged even after the instrument has been disconnected form its source of supply.

Caution

The ASMi-450 contains components sensitive to electrostatic discharge (ESD). To prevent ESD damage, avoid touching the internal components, and before moving jumpers, touch the ASMi-450 frame.

To reach the internal jumpers and switches of the ASMi-450, it is necessary to open its case. The case cover is held by four screws, identified in figure 2-1. After releasing the screws, the cover can be removed.

Use the following procedure:

∙Disconnect all the cables connected to the ASMi-450.

∙Refer to figure 2-1, turn the unit over, and unscrew the four cover screws. Keep the screws in a safe place.

∙After the four screws are released, remove ASMi-450 top cover by pulling it straight up.

ASMi-450 Installation and Operation Manual 2-3