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NARB14 Dual ND500II (IP66) – IS03013
Issue 1.0
Information Sheet
(g)
If transmitter B is selected as the
'main' transmitter, an open collector
SHTDN ALM
(
A
) signal will be applied to
3A1J4-23 from A11J4-17 ('shutdown')
of transmitter A
.
3.2 Shutdown/Changeover:
If the
selected 'main' transmitter is shutdown
because an abnormal condition was sensed
for more than 20 seconds (maximum pre-
settable time period is 80 seconds), or for
any other reason, the following will occur:
(a)
The +15 V power supply in the
selected 'main' transmitter will be
switched off, re15 V from
A11J4-13 of the main transmitter and
from A11J4-20 of the standby
transmitter via the dual transmitter
interface assembly (unit 3). The
standby transmitter will turn on.
(b)
If transmitter A is selected as the
'main' transmitter, the main/standby
relay in the transmitter A's harmonic
filter will de-energize and route the
'standby' (B) transmitter's output to J1
(
RF OUT
)
as the RF output to the
antenna system.
(c)
If transmitter B is selected as the
'main' transmitter, the main/standby
relay in the transmitter A's harmonic
filter will energize and route the
'standby' (A) transmitter's output to J1
(
RF OUT
)
as the RF output to the
antenna system.
(d)
The 'standby' transmitter will provide
15 V and the manually controlled
slewing commands
(
ATU CONT
)
for the
antenna system's antenna tuning unit
via the dual transmitter interface
assembly (unit 3).
(e)
The standby transmitter will be
providing the 'audio out'
(
RMT AUD
)
sample.
(f)
If transmitter A is selected as the
'main' transmitter, an open collector
SHTDN ALM
(
A
)
signal will be applied to
3A1J4-23 from A11J4-17 ('shutdown')
of transmitter A, causing a ground to
be applied to
RMT CHGOV ALM
outputs
3A1J1-8 and 3A1TB3-6, indicating the
standby transmitter is on.
(g)
If transmitter B is selected as the
'main' transmitter, an open collector
SHTDN ALM
(
B
)
signal will be applied to
3A1J5-23 from A11J4-17 ('shutdown')
of transmitter B, causing a ground to
be applied to
RMT CHGOV ALM
outputs
3A1J1-8 and 3A1TB3-6, indicating the
standby transmitter is on.
4. INSTALLATION INFORMATION
Complete or verify the following
requirements are completed during
installation of the dual transmitter system.
(a)
Ensure the cabinet will not topple,
when the transmitters are extended on
their drawer slides, by securely bolting
the cabinet to its mounting surface.
There are two mounting brackets at
the base (or at the rear, optional) of
the cabinet to accommodate securing
hardware (see figure 4). Remove the
cabinet’s front cover.
(b)
Permit extension of the transmitters on
their drawer slides by removing the
four M8 bolts securing each
transmitter to the dual cabinet. These
bolts must be reinstalled when the
dual transmitter system is returned to
service.
(c)
Connect appropriate AC power source
wiring (115 VAC, 60 Hz or 230 VAC
50/60 Hz) to AC duplex box J2,
ensuring wiring passes through the
cabinet's appropriate cable entry hole
(see figure 4).
NOTE
There are four cable entry holes, fitted with
liquid-tight connectors in the right-hand side
of the cabinet.
The larger holes are intended for: (1) AC
input wiring; (2) ATU interconnection; and
(3) optional battery supply wiring (plugged if
not used). Cable diameter should be
between 10mm and 17mm.
The smaller hole is intended for remote
control wiring (plugged if not used).
Summary of Contents for ND500II
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