Grass Valley Trinix v.2.4.1 - Manual (Page 158)

Installation
158 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 91.
In DV-33512 systems, if the power supply chassis is equipped with an
NR-33000 Broadlinx board, install a Cat 5 twisted pair cable 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 page 102 .
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)