PROSOFT 5302-MBP-MCM4 Interface module

With proper cables and grounding, the EIA-422 interface can communicate up to a distance of about 1000 meters. Since the EIA-422 version of the QTERM-II requires four communication lines and two power lines, the dig0 and dig1 lines are not available. The EIA-422 unit does not have the 120S line termination resistor often used to terminate an EIA-422 interface. If you need this resistor, you can install it on the main PC board (for handheld units, remove the back of the case). Figure 4- 5 shows where the resistor is to be soldered in. Do not attempt to remove the PC board from the case! For volume orders, Beijer Electronics can supply the QTERM-II with this resistor installed. 4.4.3 5-volt Buffered Interface The 5-volt Buffered interface is the same as a EIA-422 interface, except that it only uses the +transmit and +receive lines. The two remaining pins are used for the dig0 and dig1 lines, as with the EIA-232 version.When used to communicate with another 5-volt Buffered device, the QTERM-II can operate at distances up to about 5 meters. The advantage of the 5-volt Buffered QTERM-II is that it is lower power than the EIA-232 version and uses the same 5-volt logic levels as come directly out of a UART (i.e. the idle state is at 5 volts, and the active state is at 0 volts ).

Other QTERM-II Hardware

 Display The QTERM-II display is a 4-line by 20-character supertwist unit. The ASCII character set and eight userdefined characters can be displayed. Hosts which transmit 8-bit data can also display an additional 64 characters including Greek letters, katakana characters, non-English alphabetic characters and math symbols. Appendix B is a chart which shows what the QTERM-II does with every possible 8-bit value it can receive. Note that the ASCII portion of the chart (the first 128 characters) is similar, but not identical, to the true ASCII chart shown in Appendix A. If you ordered the lighted display option, the software commands shown in Chapter 2 allow you to turn the backlight on and off. Without the lighted display, these commands have no effect. If you have a wide-temperature display, the backlight will operate identically to the lighted display.Although the signal levels are the same as at a UART, the transmit and receive lines are buffered and can be connected to live signals whether or not the QTERM-II is powred ( turned on ).

Digital Outputs, dig0 and dig1 

The QTERM-II has two programmable digital output bits (dig0 and dig1) which can be used to control external devices. (Note that these are not available on the EIA-422 version due to lack of connector pins). Software commands can be used to set these lines high or low, or to have one or both function as an external buzzer or horn signal. Both lines are 74HC bus-driver outputs and can sink or source up to about 20 mA of current at 0 or 5 volts, respectively.  The lower-left key on both the 24- and 40-key keypads is a shift key and has an associated LED to indicate the shift function (this can by changed by the QDATA file; see Appendix D). Above the top row of keys is a row of userprogrammable LEDs (four on the 24-key keypad, and five on the 40-key keypad). Software commands and the QDATA file allow you to control both key clicks (on or off) and key repeat (on or off, independently programmable for each key). Every key can be programmed to return an unshifted and a shifted character or string (up to 255 characters, including delays, subject to the limitation noted in Chapter 3). Every key can also be programmed to return an unshifted and shifted release character or string.

The main products

Spare parts spare parts, the DCS control system of PLC system and the robot system spare parts,

Brand advantage: Allen Bradley, BentlyNevada, ABB, Emerson Ovation, Honeywell DCS, Rockwell ICS Triplex, FOXBORO, Schneider PLC, GE Fanuc, Motorola, HIMA, TRICONEX, Prosoft etc. Various kinds of imported industrial parts

Products are widely used in metallurgy, petroleum, glass, aluminum manufacturing, petrochemical industry, coal mine, papermaking, printing, textile printing and dyeing, machinery, electronics, automobile manufacturing, tobacco, plastics machinery, electric power, water conservancy, water treatment/environmental protection, municipal engineering, boiler heating, energy, power transmission and distribution and so on.