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3.8. GPI Remote Control Ports
The rear panel of the PXN88 offers 8 GPI inputs (16) for 0-10 VDC continuous control voltage. Each of
these inputs can be connected to an external physical device (potentiometer, contact closure, continuously variable
voltage 0-10V DC, etc.) and assigned to a PXN88 function, as for example:
•
Input, output channel or matrix crosspoint volume remote control by means of a N-VOL10K
MUTE or SOLO activation/deactivation by means of a switch or contact closure
•
Recalling a preset with a push button or contact closure
•
GPI connectors are screw terminal blocks with three-contacts. The
Positive, + 10 VDC
Variable voltage, 0-10 VDC
Ground
Connecting cables can be up to 500 meters with a minimum section of 0.5 mm
3.9. GPO Remote Control Ports
The rear panel of the PXN88 offers 8 NO/NC (normally open/ normally closed) relay outputs (17). Each of
these outputs may be assigned to a PXN88 function, such as a button of MAJORCOM-Net Manager (MUTE
key, SOLO key, etc.). This makes it possible to interact with external devices such as projection screen motors
or movable partitions, lights, sirens, other equipment GPI entries, etc.3.10. Remote control RS-232 Port
3.10. Remote control RS-232 Port
The built-in RS-232 port in the rear panel allows an external device to communicate with an PXN88 unit
via a serial connection. Said connection uses the TP-NET protocol syntaxis so to enable the external device
to obtain the value of any of the parameters of the PXN88 unit (by "GET" com mands) and/or modify said
values ("SET" commands). See the TP-NET protocol manual for more information.
The serial connection should comply with the following specifications:
Baud rate: 57600 (fixed, no autonegotiation)
Data bits: 8
Parity: None
Stop bits: 1
Flow control: None
>
Pin +
>
Pin
>
Pin
Examples of connection
wiring is as follows:
2
.
WIRING RS232 – DB9
RS232
Tx
Pin 2 (RxD)
Rx
Pin 3 (TxD)
Gnd
Pin 5 (Signal Gnd)
DB9
7
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