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HD5050
SECTION 3
HD5050070999 Version 1 Issue 4
For Software Version Z5 onwards
3.7
Remote Control
The unit can be controlled via an RS-422-A D
connector or via RollCall using the BNC connector.
The RS-422-A connections are shown in Table 3.4;
the distance of the remote panel from HD5050 can
be up to several hundred metres, depending on the
cable type and operating environment.
RollCall System (Always enabled)
The RollCall system should be connected using
75 Ohm "T" pieces in a similar manner to an
"Ethernet" system. Both extremities of the system
must be terminated in 75 Ohms.
A unique address for each unit on the RollCall
system must be set by pressing the
m
CONFIG
Button and selecting the Network item
To give
And then the Netaddr item
The addresses 00 and FF are reserved and must
not be used.
For details see Section 4.20
Network Address
Note that in a RollCall™segment, all units must
have different unit address codes. For more
information see RollCall™ section.
Note The coaxial link is bi-directional and therefore
must not be passed through signal switching
networks. Also, to allow hum and noise
cancellation the screen of the coaxial connection
must not be earthed.