ARI-500 Automatic Band Switch for ALS-500/600
Instruction Manual
8
The ARI-500 receives band information over the serial interface, while amplifier keying comes from the remote port. The serial
communications settings are 9600 bps and the linear amplifier relay must be turned on and must be setup on the radio for the ARI-500
to function properly. The serial communications setting is
Menu 56
and needs to be set to
9600
. The amplifier relay setting is
Menu
28
and should be set to option ‘
2
’.
Operation
Set the amplifier’s Frequency Select Switch to the REMOTE position. The amplifier frequency band will now be controlled by the
transceiver through the ARI-500. The amplifier will also now be keyed through the ARI-500. The relay jack on the back of the
amplifier is not used. The green PWR LED and the red LINK LED will glow steadily when the ARI-500 amplifier interface cables
are connected properly and data is being received from the transceiver. If the transceiver is off or data is not being sent, the PWR
LED will flash on for about one second when amplifier power is turned on, and the LINK LED will flash continuously
Toggle Switch: This switch in the down position will place the amplifier into standby. Up position will place amplifier into
operate. Note: This switch must be in the down position when powering up the ALS-1300 to prevent a load fault command.
Note:
The ALS-600 will be placed in OPERATE whenever keying is applied through the ARI-500 regardless of the STANDBY-
OPERATE switch position on the amplifier. If the ALS-500RC Remote Control Head is used, the ALS-600 may be taken off
line with the ALS-500RC POWER switch (ARI-500 JMP2 must be strapped 2-3, FIGURE B, when the ALS-500RC is used).
Note:
JMP 2
MUST
be in the Factory Default position (FIGURE A) if the ALS-500RC Remote Control Head is
NOT
used.
The ALS-500M/600 Power On/Off switch operates the same as without the ARI-500M. If the Remote ALS-500RC is used, refer to
Operating the ALS-500RC with the ARI-500
.
The ARI-500 has an Auto Reset for the amplifier’s load fault (O/L). When the amplifier goes into load fault mode, the ARI-500 will
wait 5 seconds and then reset the amplifier’s LOAD FAULT circuitry by cycling the ALS-500M amplifier’s power OFF and back ON
(the ALS-500M amplifier’s power switch must be in the OFF position for the Auto Load Fault reset to work), or by remotely cycling
the ALS-600 OPERATE/STANDBY function. The ARI-500 will reset the amplifier overload up to 3 times in a 5-minute period. If
the amplifier load faults more than 3 times in a 5 minute period, the amplifier’s power must be manually switched off to reset. Strap
JMP3 to OFF to disable the Auto Reset feature (see Figure C).
Note:
If Auto Reset is disabled, power must be manually cycled on both the ALS-500M and ALS-600 to re-set the load fault circuitry
(or cycle the POWER switch on the ALS-500RC if used).
Note:
When the ALS-500RC is used with the ARI-500, the ARI-500 Auto Reset feature is automatically disabled. Manual reset is
performed with the ALS-500RC POWER switch. Strap JMP3 to OFF (Figure C).
22.5 to 30 MHz (10/12 Meter) Operation
The ARI-500 has a jumper labeled JMP1. JMP1 is for operation on frequencies between 22.5 and 30 MHz (AUX). The factory
default is in the OFF position. The OFF position prevents the amplifier from operating when the transceiver is in the 10/12 Meter
band. Move JMP1 to ON if the amplifier has the 12/10 Meter kit installed. See Fig C.
The PWR and Link indicator lights illuminate steadily when the transceiver and amplifier are connected and turned on. The red LED
marked LINK will blink rapidly if the ARI-500 RADIO jack is not receiving information from the transceiver.
Note About Kenwood Radios
Since the Radio Control Port is used to get the band information from the radio, the radio must be switched on first
before powering up the ARI-500. Upon power up, the ARI-500 sends the Auto Information (AI) command to the
Kenwood radio. This instructs the Kenwood to send the radio’s status information anytime it changes. Failure to do this
will result in the radio not receiving this command and the ARI-500 not detecting a properly connected radio. Anytime
the status of the radio changes, there is a one second delay before the new information is sent over the serial line to the
ARI-500. This causes the switch to appear to respond slowly to the band changes. This is a result of the delay from the
Kenwood radio,
NOT
the ARI-500.
Note: Kenwood Com Port pins 7 & 8 must be connected together.
ON
OFF
JMP 1 (12/10 Meter Enable)
JMP 3 (Auto LOAD FAULT re-set)
FIGURE C
