Figure2. 2.1:UnitInstrumentDescriptionFrontPanel
2.1.Front Panel Indicators
PWR: (Power) Indicates power to the unit is ON.
TXD: (Transmit Data) Indicates data is being transmitted out pin 2 of the Control port (MODEM Port). Indicates data is being received at pin 2 of the selected port.
RXD: (Receive Data) Indicates data is being received at pin 3 of the Control port.
RTS: (Request to Send) Indicates high RS232 signal at pin 4 (output) of the Control port. Indicates high signal at pin 4 (input) of the selected port.
CTS: (Clear to Send) Indicates a high RS232 signal received at pin 5 (input) of the Control port.
ALL: Indicates Broadcast Mode is active, all ports open.
SECTION Indicators: When optional
•Section 1: Ports 1 - 16 selected on master unit.
•Section 2: If second Module is present, indicates Ports 17 - 32 selected.
•Section 3: If third Module is present, indicates Ports 33 - 48 selected.
•Section 4: If fourth Module is present, indicates Ports 49 - 64 selected.
Example: If Section 4 LED and Active Port 2 LED are lit, this indicates port 50 is selected (2 + 48 = 50).
ACTIVE PORT Indicators: These indicators are used with the previously mentioned SECTION LEDs to indicate the port currently connected to the Control port.