Lightning Protection | Bosch Appliances 550 manual

20 en InstallationMIC Series 550 Camera

	7.	Connect the female cable 12-pin connector to the male plug in the base of the camera.
		Screw the cable connector sleeve onto the plug until it is firmly secured (approximately
		four (4) turns from the start of thread engagement).
	8.	Earth the camera using one of the securing supplied bolts. Only earth the camera at a
		single point to prevent earth loops and video distortion (hum bars), caused by electrical
		interference, from appearing on the camera picture in the control room. Please note the
		following:
		– The camera module and housing are electrically isolated so the housing should be
		safety earthed regardless. The safety earth should be a bonding connection (for
		example, one of the securing bolts) to the camera’s outside case, and should be
		attached to the Earth terminal post on the PCD base of the camera.
		– If dual earthing is unavoidable, then a video isolation transformer should be fitted
		between the two earths.
		– If the system is copper throughout and the camera pictures are fed back to the
		control room coaxial copper cable, then the camera should be earthed only at the
		video termination point in the control room. In this case, the "Earth Link" on the PCB
		should be broken.
		– If the video is transmitted back to the control room via some non-electrical
		connecting medium (for example, fiber optic, radio, or microwave link), then the
		camera should be earthed at the transmitter point in the power supply unit. The PSU
		"Earth Link" may be used for this purpose.
	9.	Use M8 x 20 mm stainless steel nuts, bolts, and washers to secure the PCD base of the
		camera to the mounting bracket. An additional Nebar gasket or suitable silicone sealant
		can be used to ensure a water tight seal between the base and mounting surface. Tighten
		all bolts securely.

	WARNING!
	To prevent water from penetrating the composite cable connector threads, the 25 mm thread
	should be sealed at final installation using PTFE tape (not supplied). Alternatively, a suitable
	sealant may be liberally applied to the thread prior to final tightening.


	WARNING!
	If the camera is mounted ball down, it is essential that the connector and base area of the
	camera are completely sealed from water ingress. Any water getting into the connector is
	liable to cause corrosion to the connector pins, leading to unreliable operation of the camera
	unit.

	10.	Secure all cabling and conduit.
	11.	For IR models, remove the protective film from the window of each illuminator lamp.
5.5	Lightning Protection
	If the camera is positioned in a highly exposed area where lightning strikes may occur, it is
	recommended to install a lightning conductor within 0.5 m of the camera and at least 1.5 m

higher than the camera.

The construction of the housing itself is capable of coping with secondary strikes. If the correct lightning protection is applied, no damage to the internal electronics or camera should result. Additionally, an earth bonding connection to the case provides protection against damage from secondary strikes.

F.01U.239.454 3.0 2012.09

User Manual

Bosch Security Systems, Inc.

550 specifications

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