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2.4
Installing the Radio Bodies
To prepare and install the radio bodies, you must:
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2.4.1
Removing Link J4
Each body remote interface is manufactured, by default, with a 120 Ω
termination resistor across the RS485 signal lines. The control head remote
also has this termination.
This termination is only required at the ends of an RS485 network. In the
case of a TM9456 dual-radio system, the UHF radio body with the two
connections (to the control head and to the other radio body) is a node on
the network and must have this termination removed.
To remove this termination, use your fingernail (or similar) to remove the
jumper (shorting link) J4. Link J4 is located on the far side of the PCB,
away from the RJ45 connectors (see
without removing the PCB.
This must only be removed on the body remote interface connected to the
control head (item
when the interface is separate from the radio body. If the interface has
already been installed, see
Figure 2.2
TM9456 Dual-Radio Installation and Programming Guide
© Tait Limited July 2016
remove link J4 from the radio body interface that will be connected to
the control head. This is interface T02-00081-BBAA that is fitted to the
UHF radio.
assemble the body interfaces,
mount the radio bodies, then
install the radio connecting cable.
1)
in
Figure 1.1 on page
Location of link J4
link J4
Figure
2.2), and can be removed
16), and can only be removed
"Removing the Body Interface" on page
RJ45 connectors
Installing a Dual-Radio System
22.
21
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