Specifications

SECURITY CAMERA SYSTEM UPGRADE AND REPLACEMENT
FOR MONTGOMERY COUNTY DETENTION CENTER
SECURITY CAMERA SYSTEM 17000-47
- ENV50141 Conducted Disturbances
- IEC1000-4-4 Electrical Fast Transient Burst Immunity
- IEC1000-4-5 Slow High Energy Voltage Surge
*CE mark and Declaration of Conformity
MegaPower Switching Bays AD2010, AD2020
Emissions FCC Part 15, subpart B, Class A
EN55022 Class B (CE)
Immunity EN50130-4 (CE)
Safety UL2044 (AD2010N, AD2020N)
EN60950-1 (CE)
7. GENERATOR/DISTRIBUTOR FOR MANCHESTER CONTROL CODE OR RS-232
CODE
A. The generator/distributor must be capable of receiving from the matrix
switcher/controller CPU, High Speed Data which provides video switching and
camera site control data for up to 1024 camera sites. The generator/distributor
must provide BNC connections for receiving and looping the High Speed Data.
The High Speed Data OUT BNC connection must be terminated with a 75 Ω
BNC terminator for end runs of the High Speed Data. Two sets of BNC
connections shall be provided for systems that contain more than 64 monitors or
in applications using more than one CPU. The High Speed Data must be
transmitted over a good grade RG-59 video cable. The generator/distributor must
convert this High Speed Data into either Manchester Code or RS-232 both with
American Dynamics protocol.
B. Manchester Code shall be provided via 64 independent buffered outputs in four
groups of 16. Each group shall be capable of controlling separate blocks of up
to 64 camera sites and set via rear panel DIP switches. The Manchester code
must provide all control data required for the camera site and shall be transmitted
over an 18 AWG, shielded-twisted pair of wires at an impedance of 120 ohms.
Based on Belden 8760 or equivalent cable, the maximum distance from the code
output to the last receiver/dome shall be 1525 meters (5000 feet). The maximum
number of receivers/domes that can be “daisy-chained” within the 1525 meters
(5000 feet) shall be three.
C. RS-232 shall be provided via an 8-pin modular RJ-45 connector that is connected
to a terminal box. The baud rate of the RS-232 code shall be selectable at 1200,
2400, 4800, or 9600 baud. The RS-232 code must provide all control data
required for the camera site and shall be transmitted over a three wire, 18 AWG,
shielded-wire. Based on Belden 8770 or equivalent, the maximum distance from
the terminal box to the receiver/dome shall be 330 meters (1083 feet).
D. The generator/distributor must provide a selection for filtering out variable speed
control words on the Manchester or RS-232 code.