TMAA04-06 Cross-band Linking, GPS and External Interface Cable
5
© Tait International Limited February 2021
Radio Programming
Program both radios as shown in Table 5.
Connecting to an External Alert Device
The cable’s external interface connector can be used to connect a TM9356 dual body radio
system to an external alert device in the vehicle. This enables both radios to drive the same
external alert device.
Installation
The external alert lines used to connect to an external device are open collector outputs.
Connect pin 9 (radio closest to connector) and pin 10 (radio furthest from connector) of the
external interface connector to an input on the interface to the external alert device. Connect
the pins together to drive the same external alert device. Connect the pins separately to drive
separate external alert devices.
Notice
The high current sink capability of the radio’s auxiliary lines cannot be
accessed with this cable. That means you cannot connect directly to an external alert
device—an interface to the external alert (such as a controller box) must be used.
Notice
The internal pullups normally available from the auxiliary lines are not avail-
able via this cable. If the external alert requires a logic-type signal on the output lines, the
lines must be pulled up to a suitable voltage level by an external resistor.
Radio Programming
Program both radios as shown in Table 6.
Connecting to other External Devices or Signals
The cable does not currently support any other programmable I/O actions, or connection to
other external devices or signals.
Table 5 Ignition sense settings in the Programmable I/O form, Digital tab
Pin
Mode
Direction
Label
Action
Active
Debounce
AUX_GPI3
All
Input
IGN_SENS Power Sense (Ignition) High
10
Table 6 External alert settings in the Programmable I/O form, Digital tab
Pin
Mode
Direction
Label
Action
Active
Debounce
AUX_GPIO6
Conventional
Output
EXT_ALRT External Alert 1
Low
None
