Western Telematic Switch CAS-161A User Manual
2.
Unit Description
2.1. Front Panel Indicators
À
PWR: (Power) Indicates power to the unit is ON.
Á
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.
(MODEM Port). Indicates data is being received at pin 2 of the selected port.
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RXD: (Receive Data) Indicates data is being received at pin 3 of the Control port.
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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.
port. Indicates high signal at pin 4 (input) of the selected port.
Ä
CTS: (Clear to Send) Indicates a high RS232 signal
received at pin 5 (input) of the
Control port.
Å
ALL: Indicates Broadcast Mode is active, all ports open.
Æ
SECTION Indicators: When optional Add-On Module(s) are present, indicators show
port connections on master or Add-On Modules as follows:
port connections on master or Add-On Modules as follows:
• 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).
selected (2 + 48 = 50).
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ACTIVE PORT Indicators: These indicators are used with the previously mentioned
SECTION LEDs to indicate the port currently connected to the Control port.
SECTION LEDs to indicate the port currently connected to the Control port.
2-1
Figure 2.1: Instrument Front Panel