Western Telematic CAS-161A - Manual (Page 7)

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.
Â
RXD: (Receive Data) Indicates data is being received at
pin 3 of the Control port.
Ã
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.
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:
·
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).
2-1
Figure 2.1: Instrument Front Panel