Western Telematic CAS-161A manual Introduction, Typographic Conventions

1.Introduction

The CAS-161A Code Activated Switch enables a single RS232 Control port to switch between 16 to 64 ports via an ASCII code sequence.

The code sequence is a user-selectable Prefix code and a Port Select code. The Prefix code is set via the Setup switch on the bottom of the unit. For added security, the Setup switch can be set to require one, two, four or eight of the same Prefix codes. The Port Select code selects the desired port and allows data to pass between it and the Control port until the next Prefix/Port Select code is detected.

The CAS-161A also features a Broadcast mode which enables the Control port to transmit to all ports.

Optional RS422 line drivers can be factory installed to increase data transmission up to one mile.

The CAS-161A is field-expandable to 32, 48 or 64 ports by attaching up to three additional Add-On Modules to the master unit. CAS-161A applications include:

￿Industrial Robotic and Numeric Control

￿Remote Diagnostics

￿Quality Control for Test Environment

￿Laboratory Equipment Polling

￿Electronic Rotary Switch Selection for Data Gathering

￿Data Acquisition

Typographic Conventions

Throughout this User's Guide, typefaces and characters have been used to denote the following:

[Key]	Text set in bold face and enclosed in square brackets indicates a specific
	key. For example [Enter] or [Esc].
^ (e.g. ^V)	Indicates a key combination used to invoke a command.
	For example, the text “^V” (Control V) indicates the [Ctrl] key and the
	[V] key must be pressed simultaneously.
COURIER FONT	Indicates characters typed on the keyboard. For example ^Yk or ^V

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