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MIC412TI and MIC412TF Camera | Installation and Operation Manual
Earthing of the MIC 412 camera
1. The camera module and housing are electrically isolated so the housing
should be safety earthed regardless. The safety earth should be a bonding
connection to the cameras outside case for example one of the securing
bolts.
2. The camera should be earthed at one point only to prevent earth loops &
thus hum bars showing on the control room monitor.
3. If the system is copper throughout & the camera pictures are fed back to
the control room coaxial copper cable, then the camera should be earthed
at the video termination point in the control room & nowhere else. In this
case the PCB "Earth Link" should be broken.
4. If the video is transmitted back to the control room via some non electrical
connecting medium, e.g. fibre optic, radio or microwave link, then the
camera should be earthed at the transmitter point in the PSU. The PSU
"Earth Link" may be used for this purpose.
5. If dual earthing is unavoidable then a video isolation transformer should be
fitted between the two earths.
Lightning Protection
If the camera is fitted in a highly exposed place then consideration should be given
to lightning protection. A good earth bonding connection to the case itself will
provide protection against damage from secondary strikes.
Where there is a risk of a primary strike hitting the camera housing directly, it is
recommended that a separate lightning conductor be fitted within 0.5m of the
camera and at least 1.5 m higher than the camera.
The construction of the housing itself is very capable of coping with secondary
strikes and no damage to the internal electronics or camera should result if correct
lightning protection is applied.
Bosch Security Systems
Electrical Connections
WARNING: Electrical Danger: Ensure all power is
disconnected before opening or working upon the Power
Supply Unit.
Installation must be carried out by suitably qualified
persons. Ensure that the National Electric Code,
ANSI/NFPA, Canadian Electric Code, and all local country
codes are observed.
A purpose built composite cable for use with the camera is available; these cables
are pre-made with a Female terminated 12 way connector fitted to them for
attachment to the Male connector installed into the base of the camera.
The composite cable has no termination (free wires) at the other end for wiring into
the appropriate power supply. The standard colour coding used in these cables is
as shown below.
Table A – MIC412 Composite Cable Pin table
Connector Pin
A
B
C
D
E
F
G
H
I
K
L
M
Issue 8
AAA
Signal Name
Wire Colour
Video Output
Coax core
Video Return
Coax screen
Tamper Sw
Black
Tamper Sw Rtn
Brown
Washer drive Rtn
Grey
Washer drive
Orange
Full Duplex Tx A.
Blue
Full Duplex Tx B.
Violet
Full Duplex Rx A.
Yellow
Half Duplex Tx/Rx A.
Full Duplex Rx B.
White
Half Duplex Tx/Rx B.
Power input 1.
Red
Power input 2.
Green
EN | 14
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