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7.9
RD315 PTZ SITE COMMUNICATIONS MODULE
The RD315 site communications module is used to communicate with theRD378E site
receivers, RD379 site receivers, and the RD380 Elbex Dome Site Receivers. The RD315
can control any combination of these site receivers for up to 16 PTZ sites, all connected
to the same two-wire network.
The RD315 uses a specially designed communications protocol allowing control data to
be transported at high speed over the two-wire network. All PTZ sites connected to the
two-wire network may be automatically monitored (polled). If any site should become
inactive (i.e. blown fuse, cut cables), then an alarm may be generated corresponding to
the detected site failure.
The RD315 module provides an RS-232 port. This allows for easy monitoring and
servicing of other two-wire networks and some special modes of communication
connection. Five LED indicators are provided on the front edge of the module:
L1
L2
L3
L4
L5
The RD315 uses a Telecom approved line isolation transformer. This provides the
connection to the 600 ohm balanced two-wire network.
Note: Only standard twisted pair cable is required for the line connections up to 5 Km of
cable length.
The data format is true AUDIO to Line (0.3 to 5 kHz bandwidth) and can tolerate a total
line attenuation of up to 20dB. It supports 4-wire audio interface for connection to
simplex audio channels (microwave, optical fiber, etc.) The most important feature is that
all communications to/from the RD315 is through a common TWO-WIRE line providing
simultaneous control of up to 16 site receivers per two-wire network.
Rev. C
Green PTT Active
Red TX Failed
Green PTZ Comms
Yellow Reading Data From Subrack
Green Writing Data To Subrack.
7.9-1
HMXMU001018
10/06
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