MIC400 Series Camera | Installation and Operation Manual
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Bosch Security Systems
Issue 1
MIC400IR Power Supply Units
MIC-IR-240PSU, MIC-IR-115PSU, MIC-IR-24PSU and MIC-IR-12PSU
The power supplies for the MIC400IR cameras are available in a 230v/115v AC
source; a 24v AC source or a 12V DC source
A weather resistant (IP66) box prefitted with four cable glands.
A power supply for the MIC400 camera at 15v AC nominally.
A second isolated power supply for driving the IR illuminators, the operation of this
power supply is controlled by the camera itself via telemetry commands received
from the control room. The power supply operates with twin illuminators; this drive
is a constant current drive which automatically configures itself for IR lamp
operation. There are no adjustable items within the power supply except for the
three links discussed below.
Screw termination of all third party cables into and out of the box.
Correct video termination for the camera coaxial cable.
Dimensions
Power supply enclosure: - 260mm (W) x 90mm (H) x 120 (D)
The power supply provides a circuit for operating a 230v/115v mains driven
washer drive pump and reservoir system.
The power supply also supports 4 volt free alarm contact inputs which can be
made to activate presets within the camera but always notifies the control system
of the status of these alarms, HD2 provides the option for connection up to 4 alarm
inputs to the power supply. These can be tamper switches or inputs from other
sensors/switches.
Earth isolation and termination within the unit to correctly control video earthing
and thus prevent Earth loop.
Setting the Power Supply Link Options
The PCB has three optional links to allow the power supply to be set up for
different installations. If a link change is required this can usually be done with the
PCB in place and setting of links using a soldering iron and TCW link wire. The unit
is supplied with all links fitted. For the following special functions the associated
link should be cut out:
Earth Link 1 (left link) should be broken if there is a separate connection between
video screen and earth. Usually occurs on copper connected systems where all
the copper video coaxes are taken back to the control room to be connected to a
central earth point.
Earth link 2 (right link) should only be cut under special circumstances. This link
ensures that the metal case of the power supply is connected to earth. The
electronics / video screen earthing is controlled by earth link 1. If required a
separate heavy duty earth strap should be fitted to one of the four mounting bolts
on the outside of the box.
230v AC/115v AC Link
230v link should be removed and replaced by two separate links linking the two
pad pairs shown as 115v links if the power supply is to be run from an 115v AC
mains supply.
There are no other adjustable parts on the power supply.
Fuse Ratings
Mains feed to the transformer is protected by FS2 which is rated as a Ceramic fuse
at 600mA quick blow. Depending upon the setting of the links to the right of SK1
the terminal box can be supplied from 230v AC or 115v AC. The ident on the PCB
defines which links should be soldered into the PCB to achieve the desired
voltage. (Factory default is 230v AC).
If there are no other connections to the camera to earth via a locally connected
fibre interface unit or via a video/opto transmission system or some other third
party equipment, then the left Earth Link situated below FS4 should be left intact.
