Installation manual

21
Installation Manual
Star Connections/AD1691 Code Distributor
When the patch panel’s Manchester black, white, and shield terminals are wired to the input terminals of an AD1691
Code Distributor, up to 64 Manchester outputs can be transmitted to receiver/drivers and integrated domes. See Drawing
10, Page 19 for a typical connection utilizing the AD1691.
AD2031/2032/2033 Accessories
The MegaPower 48+ CPU can output Manchester code to control external circuit switching synchronized with the
switching of video inputs to video outputs (via the AD2031 Switcher Follower). It can also synchronize external circuits
with the switching of auxiliary contacts associated with individual video inputs (via the AD2033 Auxiliary Follower).
Additionally, it can provide relay contact closures for corresponding video outputs that are displaying alarm conditions
(via the AD2032 Alarm Responder).
See Drawing 11, Page 20 for a typical connection of the patch panel to an AD2031 synchronized with an external audio
circuit.
SensorNet Communications
SensorNet is a two wire, two-way communications protocol. There are 12 screw terminals on the MegaPower 48+ patch
panel providing six channels for SensorNet communications. Directly below the SensorNet screw terminals is a DIP
switch that is used to terminate each of the six channels.
• Cable required: 22 AWG, single twisted pair, unshielded, non-polarized. Belden 8442 or equivalent
• Maximum distance: 3300 feet (1 km)
• Data rate: 230 kb/sec
SensorNet Daisy Chain Configurations
Each SensorNet patch panel terminal pair can be wired directly to eight-dome daisy chain groups to accommodate all
48 video inputs available to MegaPower 48+.
Star Connections/6-Position J-Boxes
Each SensorNet patch panel terminal can be wired to a 6-position J-box. The J-Box serves as a hub for star connections
for up to 6 domes. Each J-Box-to-dome connection can also serve as the starting point for a daisy chain group. See
Drawing 12, Page 22 for a typical connection of the patch panel to a 6-position J-box.
Additional SensorNet Documentation
• SensorNet 1-Position J-Box Installation Guide — part number 8000-0971-01
• SensorNet 6-Position J-Box Installation Guide — part number 8000-0975-01
• SensorNet Network Design Guidelines — part number 8000-0970-01
SEC-RS422 Communications
RS422 is a four wire, two way communications protocol. There are 24 screw terminals on the MegaPower 48+ patch
panel providing six four–terminal channels for RS422 communications.
• Cable required: 22 AWG, four conductor, double twisted pair (polarized)
• Maximum distance: 3000 feet (915m)
• Data rate: 4.8 kb/sec
RS422 Daisy Chain Connections
Each RS422 patch panel four terminal group can be wired directly to eight-dome daisy chain groups to accommodate
all 48 video inputs available to MegaPower 48+.
Star Connections/10-Position J-Boxes
Each RS422 patch panel terminal group can be wired to a 10-position J-box. The J-Box serves as a hub for star
connections for up to 10 domes. All 48 video inputs can be accommodated using six 10-position J-boxes, with each J-
Box connected to six domes. See Drawing 13, Page 23 for a typical connection of the patch panel to a 10-position J-
box.
Additional RS422 Documentation
• RS422 1-Position J-Box Installation Guide — part number 8000-0588-01
• RS422 10-Position J-Box Installation Guide — part number 8000-0320-01
• Communications Protocols and Cable Networks — part number 8000-2573-19