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MIC400 Series Camera | Installation and Operation Manual AAAEN | 29
Bosch Security Systems Issue 1
Connecting the MIC-USB485CVTR, USB to RS485 Converter
The MIC-USB485CVTR is a USB to RS485 signal converter that allows PCs
without a serial port to connect directly to the MIC400 series camera via the
telemetry connection (HD4) in the power supply, the MIC-USB485CVTR can also
be used to connect a PC to any other RS485 device.
The MIC-USB485CVTR has been designed to work with all functions in Universal
Camset and to be backwards compatible with legacy version of Camset although
full compatibility is not guaranteed.
The MIC-USB485CVTR should be connected to the telemetry header (HD4) of the
MIC400 power supply with Standard Twisted Pair cable such as Belden 8760.
The table overleaf shows how the screw terminal connections on the MIC-
USB485CVTR connect to the MIC power supply depending upon the protocol and
selected communication mode you may only need a 2 wire configuration.
Table Q – MIC-USB485CVTR Connection Table and Diagram
Converter Output
MIC Power Supply
Telemetry Header
(HD4 or HD5)
Communication Mode
RxB / Rx - TxB
RxA / Rx + TxA
Full Duplex (4-wire only)
GND / 0V GND Shield (always)
TxA / Tx - RxA
TxB / Tx + RxB
Simplex
Half Duplex (2-wire)
Full Duplex (4-wire)
CAUTION: Should be taken to avoid earth loops when
connecting 0v from the converter to GND terminal in the
MIC power supply