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20 en | Installation MIC Series 550 Camera
F.01U.239.454 | 3.0 | 2012.09 User Manual Bosch Security Systems, Inc.
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.
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.
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.