Serial Port (NVM-302D, NVM-302E)

The Serial Port component provides RS-232 serial communication between the Q-SYS Control Engine and external devices connected to the NVM-302E or NVM-302D's RS-232 port(s). Use this component to control third-party devices such as displays, projectors, media players, lighting controllers, and other RS-232-compatible equipment through Lua scripting.

The Serial Port is a subcomponent of the NVM-302E Encoder and NVM-302D Decoder. The NVM-302E has two Serial Port components (Serial Port A and Serial Port B), corresponding to the two RS-232 3-pin Euro Terminal Connectors on the hardware. The NVM-302D has one Serial Port component (Serial Port), corresponding to its single RS-232 connector.

The Serial Port component connects to the same downstream components as the Serial Port on a Q-SYS Core or other peripherals: wire the Serial Port output pin to a Control Script, Command Button, or Text Controller component to send and receive serial data.

Note: The serial port's communication parameters (baud rate, data bits, parity, stop bits) are configured in the downstream component, in a Lua Control Script), not in the Serial Port component itself.

Specification

Encoder (NVM-302E)

Decoder (NVM-302D)

Serial Port Count

2 (Serial Port A, Serial Port B)

1 (Serial Port)

Physical Connectors

2× RS-232, 3-pin Euro Terminal Connector

1× RS-232, 3-pin Euro Terminal Connector

Function

Identical

Identical

The NVM RS-232 port uses a 3-pin Euro Terminal Connector (not a DE-9):

  • Pin 1 – TX (Transmit)

  • Pin 2 – RX (Receive)

  • Pin 3 – GND (Signal Ground)

Input Pins

RS-232 Serial Port – Serial port data to and from the RS-232 connector on the NVM-302E or NVM-302D.

Output Pins

Serial Port — Connects to a Control Script, Command Buttons, or Text Controller component.

The Serial Port component does not have its own user-configurable properties. When a Serial Port component is selected, the Properties pane displays the parent NVM-302E or NVM-302D properties, but none of these belong to the Serial Port component itself. For NVM-302E properties, see Encoder (NVM-302E). For NVM-302D properties, see Decoder (NVM-302D).

Control

Type

Description

TX Bytes

Text (read-only)

Displays a running total of the number of bytes transmitted through this serial port.

RX Bytes

Text (read-only)

Displays a running total of the number of bytes received through this serial port.

Reset

Button

Resets both TX Bytes and RX Bytes counters to zero.

Pin Name

Control Type

Value

String

Position

Direction

Description

Receive Bytes

Text

—

text

—

Output

Running total of bytes received.

Reset

Trigger

0

1

false

true

0

1

Input / Output

Reset TX and RX byte counters to zero.

Transmit Bytes

Text

—

text

—

Output

Running total of bytes transmitted.