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7.9 RD315 PTZ SITE COMMUNICATIONS MODULE, CONTINUED
Sites can be of wired, star or delta configuration and the RD315 is protected against high
voltage destruction with a line isolation transformer on the two wire lines. Optional
communications are through direct bit transfer type radio or optical fiber links at RS-232
levels using a synchronous bit stream depicted as AF-232.
Direct RS-232 from a RD-315 to one PTZ site can also be used over networks requiring a
normal RS-232 asynchronous protocol. Mixed modes of communication can also be
used. An optical fiber cable can be used for the first site and a two-wire line onto the
successive sites. Or a two-wire line to the first and then the optical fiber cable continuing
onto the successive sites. The site receiver manuals contain drawings that show many
methods of connecting to the RD-315.
7.9.1
PTZ Site Wiring
The normal connection to the site is a two-wire data type cable that carries the AFSK
control information from the RD-315 communications module. In some situations a 4
wire audio connection may be more suitable for the type of transmission equipment
being used. i.e. optical fiber AF channel bi-directional. In a 4-wire mode, link audio ring-
around or feed-back can be avoided. There are special interface connections for RS-232
and other types of fiber optics.
7.9.2
DIP Switch Setting
The RD-315 module uses the standard CC-2000 communications controller chip. This
chip is also used on all PTZ site receivers. As such, the CC-2000 chip must be setup for
the desired and compatible mode of operation.
SW1
1
2
3
4
Rev. C
Communications Modes
Description
Mode Select
Destination
Poll Mode
Not Defined
ON
OFF
Master
Slave
Slave
Master
Enable
Disabled
-
-
7.9-2
Factory
ON
ON
ON
ON
HMXMU001018
10/06
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