GAI-Tronics IPE2500A, IPE2500A-MLS Paging Encoder / Desktop Controller User and Installatoin Manual - Manual (Page 26)

Operation IPE2500A and IPE2500A-MLS Paging Encoder/Desktop Controller
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Optional DC Control Kit
N OTE : This optional feature requires the XDC0001A DC Control Kit and XAC0100A Mounting
Kit.
DC currents from +14 to –14 mA in 0.5 mA increments are used to control radio functions. Parameters
for dc control are set using the programming software. However, the accuracy of the adjustments may be
affected by line loads and installations. In order to work properly with varying line loads and dc remote
adapters, the time the current is present before allowing key-down may be programmed with the
software. Appropriate settings ensure the state of the remote adapter can be assured when a frequency
change current is asserted.
N
OTE : JU1 on the power I/O board (DPS) must be “out” for DC Control.
Optional Relay Control Kit
N OTE : These optional features require the XRC0001A Relay Control Kit and XAC0100A
Mounting Kit.
The CARD Suite programming software can be used to assign the type of configuration desired. It can
be configured as E&M control, local, or E&M with Tone control. Two pair of leads controls
communication between the IPE2500A and the base station. Maximum load ratings for each relay output
are 1 A @ 125 V ac and 2 A @ 30 V dc.
Local Control
For applications where the radio is connected directly to desk set units on-site, the unit must be
configured for local control. Also, a PTT and monitor relay must be programmed with the CARD Suite,
and these connections must be made to the relays.
E&M
The CARD Suite can be used to configure the IPE2500A for E&M control. The unit can be configured
for either E&M control or E&M with tone control. Two pairs of leads control communication between
the desk set and the base station. One pair is dedicated to audio TX/RX, the other pair controls the E&M
signaling.
The IPE2500A uses the M lead to signal when to transmit, and the E lead to detect when to receive. Note
that the E lead is not required. The M lead must be set on relay module using the CARD Suite software.
E Lead
In systems requiring full-featured E&M control, the input can be configured as an E lead to indicate an
unsquelched condition. The IPE2500A uses this input as a VOX indicator, so when asserted, generates a
VOX condition. However, the speaker squelch is operated by voice activity.
M Lead
A closure is needed to act as the M lead, which is the relay closure. The M lead will be closed depending
on the type of configuration and the type of transmission, only during a non-intercom transmission.
 When configured as E&M control, the relay will be closed only when a transmission requiring
transmitter keying is needed.
 When configured as E&M with Tone control, the relay will be closed whenever a non-intercom
transmission is done.