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RC4000 ACU Boardset
2.1.2.4.4 J4 - Relay
Designation
J4
"NO NC COM"
HPA Disable, normally-open, 3A @ 30VDC max or 3A @ 250VAC max
HPA Disable, common, 3A @ 30VDC max or 3A @ 250VAC max
HPA Disable, normally-closed, 3A @ 30VDC max or 3A @ 250VAC max
The HPA disable is in a form-C contact arrangement with normally-open, normally-closed and common
contacts. While the antenna is below the down elevation limit or while the antenna is performing any
large-scale auto-moves, such as deploy, locate, or stow, the normally-closed and common pins will be
connected. After the auto-move is complete, the connection will be released.
Some system configurations support a TX MUTE button. The HPA will be disabled when the TX MUTE
function is active. In systems with the TX MUTE button this (usually blue) button is lit when the system is
un-muted. In systems with a web-served TX MUTE button, the web-served button and physical button
will function as if they are the same button. In short, the HPA disable function can be described by the
following Boolean equation.
HPA DISABLE = DOWN_Limit OR Automated_Slewing_Motion OR TX_MUTE
The contact arrangement is shown below:
2.1.2.4.5 J5 - Bar LEDs
Designation
J5
unmarked
This connector is used by the RC300 product but not utilized for RC4000 applications.
Chapter 2
PCB
Pin Count
3
PCB
Pin Count
9
39
Connector
Molex Friction Lock Header
Connector
Molex Friction Lock Header
Hardware
Type #
2
Type #
2
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