Instruction Manual

2
CAUTION
UNEXPECTED BEHAVIOR OF APPLICATION
Don’t use more than one splitter as a branching device on the RIO networks.
This restriction applies to both MA-0331-000 and MA-0186-100.
Failure to follow these instructions can result in equipment damage.
Cabling recommendations to avoid communication signal disturbances
Lengths recommendations:
The minimum length for a RG6 drop cable is 2.5m (8.53 ft) – shorter drop cable generates unacceptable signal
reflections from the tap.
The maximum length RG6 drop cable is 50m (164 ft). Keeping the drop cable lengths within this limit helps to reduce
attenuation on the drop and noise issues on the system.
The maximum length of the trunk cable is determined by the maximum system attenuation.
Install taps at least 2.5m (8 ft 2 in.) away from one another. Indeed if taps are placed too close to each other (or too
close to a splitter in a Hot Standby system), a cumulative reflection will result.
CAUTION
UNEXPECTED BEHAVIOR OF APPLICATION
Do not connect or disconnect a drop cable from a tap on an ACTIVE network. Either of these two actions can cause
excessive communications errors on the network.
Failure to follow these instructions can result in equipment damage.
Network impedance:
All RIO cable & components have a characteristic impedance of 75 Ohms. A proper impedance match is required across
the entire network with 75 Ohms terminators. Both RIO processor & RIO adapter have internal terminators.
Install the dedicated 75 terminator to each unused port:
add a 52-0422-000 terminator at the last tap of the network on the unused trunk port (trunk impedance termination).
in any open drop cable ports on taps that have been installed for future system expansion, put 52-0402-000
terminators.
in-line on cables running from the primary and standby controllers to the splitter in a Hot Standby system, put 52-
0411-000 Self-terminating F Adapter or STFA, on RG6 cable; this allows you to disconnect one of the two Hot
Standby controllers while the other one maintains primary control.
RIO network grounding
The cable system should be grounded at only one point within 6m (20 ft.) of the RIO processor at the head-end of the
network. A 60-0545-000 Ground Block, a single MA-0185-100 Tap, a MA-0186-100 Splitter, or a MA-0331-000
Splitter may be used; assuring that the cable system will be permanently grounded even when disconnected from the
RIO processor.