GAI-Tronics L3149B C200 Advanced Deskset - Manual (Page 57)

L3149B (C200) Advanced Tone Remote Desk Set Programming
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Input/Output Relay Table
N OTE : This screen only appears if a relay board is present.
The relay module consists of four physical relays and four inputs. Relays 1 and 4 are DPDT relays.
Relays 2 and 3 are DPST relays. The relays are physically the same part, but I/O limitations of the
module limit the number of connections to each relay. The inputs to the module are internally pulled-up
and sense closure to ground only.
Relay Inputs
Each of the four inputs can be tied to certain functions within the unit.
Button Press
The inputs of this unit can be configured for remapping of front-panel buttons. When the input is
asserted, the programmed key sequence is pressed. When the input is disasserted, the programmed key
sequence is released. This allows great flexibility when unique devices or operations are needed.
Buttons available on the front panel and some
LOCK
combinations can be programmed to an input
closure. This allows for very unique custom installations where an external device may need to assert the
TRANSMIT
or
MONITOR
keys, such as a custom transmission device. Alternately, when a certain
condition occurs and can assert an input, a page or MDC can be automatically sent. When used in
conjunction with the programmable buttons, almost any case can be handled by this unit.
Input VOX or E-Lead
In systems requiring full-featured E&M control, the E-lead is used to indicate an unsquelched condition.
When configured properly, the unit will use this input as a VOX indicator and, when asserted, generate a
VOX condition. This may be useful when the receive audio is invalid until the input is asserted.
However, the speaker squelch is operated solely upon the presence of receive audio activity.
N OTE : This option is available only if Type of Interface is E&M or Tone with E&M.
Monitor Sense
When configured for local control and with parallel units, it is important to know then the radio system is
in monitor mode. This input, although not required, allows the operator to know when parallel units have
placed the radio in monitor mode. When this input is asserted, pulled to ground, the
MONITOR
LED
lights. When the input is disasserted, the
MONITOR
LED extinguishes.
N OTE : This option is available only if the Type of Interface is Local.