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CTM300, CTM350 Data Entry Terminal


CTM300 Operator Interface and Data Entry Terminal

Description

The CTM300/350 models are data entry/display terminals with the versatility to meet the varied needs of industrial data collection. The terminals are lightweight, 1.7lb, and are enclosed within a 9.0"W x 5.0"H x 1.5"D case. The terminals have sixteen programmable function keys (8 keys - 16 functions). On the CTM350, space is provided to customize the keyboard and function keys with company logos and function labels. The compact size of the CTM300/350 makes them ideal for applications where space is at a premium. Thirteen command sequences are used by the host via RS232C communications to control these terminals. Intelligent Instrumentation's products are backed by over 30 years of experience providing solutions to industry through state-of-the-art technology. This experience has ensured that the design of the CTM300/350 is focused on the needs of customers.

Display

The CTM300/350 features a 2-line by 40-character liquid crystal display (LCD). For ease of viewing in low-light areas, the display is illuminated with an electro-luminescent backlight that may be controlled either from the keyboard or from the host computer. The viewing angle is adjustable by inserting a small flat-head screwdriver through the hole in the middle of the connector panel on the back of the terminal.

Communications

The CTM300/350 built-in host communications port features RS232C character mode operation.

Auxiliary

The auxiliary port on the CTM300 and CTM350 models may be used for the following purposes:

Digital I/O Port - The digital I/O port consists of 8 inputs and 8 outputs. The digital inputs may be used to read the state of any TTL or CMOS signal. Possible applications include reading switch positions, machine state, and door latch positions. The digital outputs may be used to provide control of external devices such as lights, alarms, and door latches. In most cases, an intermediate relay or transistor circuit must be added to drive the external device.
Serial Pass-through Port - The RS232C serial auxiliary port is a TxD and RxD pair which may be used to communicate with devices such as an electronic scale, CRT, or a second terminal. When the terminal is placed in serial pass-through mode, it behaves as if the host and auxiliary RS232 wires are connected and the terminal is transparent. All keys and display functions are disabled.
Serial Echo Port - The RS232C serial auxiliary port may also be placed in echo mode. All keystrokes which cause a character to be transmitted out the host port will be transmitted out the serial auxiliary port.
Parallel Printer Pass-through Port - The parallel printer port is implemented as a subset of the Centronics printer interface. Seven data bits, a data strobe, and printer busy signals are supported. All other printer outputs are ignored. Unused printer inputs, if present, may need to be tied to appropriate levels for proper operation.
Parallel Printer Echo Port - The parallel printer port may also be placed in echo mode. All keystrokes which cause a character to be transmitted out the host port will be transmitted out the parallel printer port.

Mounting Options

The CTM300/350 may be placed on a desktop using the TM8440A plastic stand or the LPA038 desktop metal legs. Another mounting option is recess mounting through panel cutouts on a wall or other flat surface using the LPA039.

Operation Mode

Two modes of operation adapt the CTM300/350 terminals to various applications and software environments. One mode provides a means of communicating to the terminal, the other allows terminal setup. The modes are as follows:

Setup mode allows the maintenance personnel to establish the terminal operating parameters interactively from the keyboard. Prompts guide the operator through the selection of baud rate, protocol, and other parameters.
Character mode operation is similar to that of a standard CRT. In this mode all entered characters are immediately sent to the host computer; the user selects whether the characters are displayed locally before transmission. The host computer has full control of screen format and of the location of the visible display window. The window and cursor can be scrolled in four directions using relative cursor positioning characters.

Standard Commands

The standard commands are as follows:

r - Read from digital input port
e - Echo message from host
u - Set pass through mode
v - Set pass-through termination characters
t - Set turnaround delay
k - Set keyboard parameters
m - Define function message
d - Set display characteristics
f - Set display format
i - Insert function message in output stream
w - Write to digital output
a - Asynchronous serial interface configuration
j - Configure auxiliary port
b - Backup parameters in nonvolatile EEPROM
c - Configuration request
x - Set terminal to default/custom parameter set

Command Set

The programmer is given a powerful set of command or Escape sequences with which to control terminal operation. With the exception of communication-related functions, options selected from the keyboard in Setup mode may also be changed by the host computer. All commands supported by Intelligent Instrumentation's on-line terminals are supported by the CTM300 family.

CTM 300 Features and Benefits
Full alphanumeric keyboard with ABC, QWERTY, or Numeric
2 X 40 character supertwist LCD
Numeric configuration provides wide key spacing and function label areas (CTM350)
16 functions keys store up to six characters each
Auxiliary port that may be set up as serial, parallel printer, or digital I/O
Keyboard sealed to resist dust and moisture