Com bus – Grass Valley Trinix v.2.4.1 User Manual
Page 76
Planning Guide
76
Planning and Installation Manual
Com Bus
In multi-frame systems, a “Com Bus” is used to loop through each
frame, up to a maximum of four. The Com Bus is intended to provide
switcher monitoring of multiple frames using Broadlinx web pages or
SNMP. The Com Bus uses a 10/100BaseT (Cat 5 twisted pair) cable with
RJ-45 connectors. Shielded cable is recommended, maximum length 60
meters.
1
Maximum length for unshielded cable is 100 meters.
Figure 38.
In DV-33512 systems, if the power supply chassis is equipped with an
NR-33000 Broadlinx board, a Cat 5 twisted pair cable must be installed
between the power supply chassis Com Bus connector associated with
the NR board and one of the main chassis Com Bus connectors.
If there are additional DV-33512 main frames in the system, and they do
not have Broadlinx boards, then the Com Bus should be daisy-chained
to those frames also.
For an illustration, see
1.
Compliance with EEC, EMC, EN series, UL- 1950, and CSA C22.2 No. 950-M89 standards requires use of a shielded cable.
Com Bus cable
(see discussion
for specifications)
Trinix frames
with SR-33000
Sync/OPM
or SR-33500
Sync/OPM
boards
Trinix frame
with NR-33000
Sync/NIC/
OPM board
(Broadlinx
board)