PA516 Series User’s Manual
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20
Alarm Connector
The Power Amplifier provides two changeover alarm contacts via a Male DB9 connector on the rear panel.
Connections are as follows:
Pin
Name / Function
1
Minor alarm - Common.
2
Minor alarm – Closed on alarm.
3
Not used.
4
Major alarm – Closed on alarm.
5
Major alarm - Common.
6
Minor alarm – Open on alarm.
7
Not used.
8
Not used.
9
Major alarm – Open on alarm.
The alarm relay contacts are rated at 60VDC, 100mA.
Minor Alarms: Excessive VSWR.
Cooling fan speed out of limits.
Internal voltage rail out of limits.
Major Alarms: Output power level more than 6 dB different from configured reference level.
Internal temperature is above 85
˚C.
PA has been shut down due to excessive reverse power.
Control Port
Purpose:
The rear panel Control connector provides a local terminal to configure and report all aspects of the
operation of the Power Amplifier.
The three external control signals are connected via a male DB9 connector on the rear panel.
When a control input is connected to the system ground, the respective signal is activated:
Pin
Name / Function
1
Mute Interlock control.
2
System ground.
3
Mute control.
4
System ground.
5
Reverse Power Reset control.
6
System ground.
7
Not used.
8
Not used.
9
Not used.
The control inputs source approximately 12VDC at about 1mA.
The three external control signals provide the following functionality;
Mute Interlock Control
-
Not currently implemented. Available for future applications.
Mute Control
-
Disables the PA516 RF Output for control and/or maintenance purposes.
(Note: This also reduces PA516 power consumption to a nominal standby value)
Reverse Power Reset Control
-
Facilitates external reset of a VSWR alarm state (i.e. VSWR Shutdown) if present.