Technical data

Install the MIC Power Supply Unit (PSU)
MIC PSU Overview
!
Caution!
Use only the power supply specified for your specific model of camera.
Bosch provides a range of power supply units (PSUs) for MIC Series cameras. These units
have a variety of common voltages and provide all the connections needed for power,
telemetry and video.
!
Warning!
These power supply units are NOT explosion-proof and must be installed outside of the
hazardous environment.
Each MIC PSU provides all of the connections needed for power, video, and telemetry for a
single MIC camera. Each MIC PSU has CE and FCC approval and has a cast-aluminum
enclosure that is weather-resistant (rated IP65). Features include:
– A provision for driving various optional interface cards mounted internally to the MIC
power supply enclosure (for example, an 8-input alarm card (MIC-ALM))
– A provision for a signal interface card (MIC-BP4) to connect telemetry to Bosch Biphase
equipment
– Screw termination of all cables (composite, telemetry, and ancillary) into and out of the
enclosure
– Earth isolation and termination within the unit to control video earthing correctly and
thus prevent earth loops
Each MIC PSU ships with the following parts:
– Three (3) M12 cable glands for telemetry, video and ancillary equipment
– One (1) M16 gland for connection of the shielded composite cable to the MIC camera
– One (1) 1/2 in. NPT cable gland for the power cable connection
– One (1) 1/2 in. NPT and one (1) M12 blanking plug
The transformer fitted to these designs is thermally protected and automatically cuts out if the
transformer core temperature exceeds 40 degrees C. On cooling, the transformer will become
operational again. In addition, the unit provides all the terminations required to connect a
MIC440 camera to third party equipment. A second, independent 12v (600mA) power supply
is also included to drive any internally fitted optional interface cards.
Earth Link on PCB
The printed circuit board (PCB) of each MIC PSU (IR and non-IR) has one Earth Link option,
near terminal block HD1, to allow the PSU to be set up for different earthing schemes:
– If there is a separate connection between video screen and earth, the Earth Link should
be broken. This usually occurs on copper-connected systems where all of the copper
video coaxes are taken back to the control room to be connected to a central earth point.
– If fiber optics or other indirect connections are used to get data and video to and from
the control room, then the Earth Link should be left intact, as long as it is the only
camera-end earth reference point.
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30 en | Install the MIC Power Supply Unit (PSU) MIC440 Explosion-protected Camera
2013.11 | 8.1 | Operation Manual Bosch Security Systems, Inc.