Engineering, Polytechnic and Vocational Training Equipment-> Microprocessor and PC Lab Experimental Interface Modules

1 2 [3] 4 [«Back ||Next »]   Click to Enlarge 8251 PROGRAMMABLE COMMUNICATION INTERFACE TRAINER. MODEL IBL-IM-32 This consists of a programmable communication interface and necessary hardware for communication in RS232C standards. Using this trainer the student can experiment to understand various protocols for serial communications. Typical study experiments are for 1. Synchronous and Asynchronous transmission 2. Internal and external character synchronization 3. Generation of Synchronous baud rate generation 4. Full Duplex Transmitter and Receiver 5. All input outputs are TTL compatible. 6. Single TTL clock This unit can be interfaced with System Bus of Microprocessor Trainer Model MPT-85. This unit requires an external pulse generator for generating data stream. Using this trainer it is possible to observe the following signals Reset, Clock, C/D, Read, write, CTS, DSR, RxRDY, TxRDY etc. This unit has built-in power supplies necessary for RS232C interface also. See Enlarge Click to Enlarge 8259 PROGRAMMABLE INTERRUPT CONTROL TRAINER. MODEL IBL-IM-33 Interrupt by the very name suggests that a normal sequence of execution is temporarily suspended and another task to be performed. For example, Power fail routine must be given highest priority to save the data and control parameters, before the CPU is switched OFF or when the power fails. When the power supply is restored, the CPU must know where to continue and perform its task with out break. So this can be called as an occurrence of an interruption in the normal sequence of execution. But depending on the priority, the order or Priority can be assigned in the firmware setup. This trainer provides necessary facilities to experiment the above for better understanding. We use INTEL make 8259 PIC device. In order to support generation of priority of interrupt 8- numbers of switches connected. Using these switches, the programmer can write his application programs and test his software. This unit is connected to the System bus of the Microprocessor Trainer Model MPT-85. This unit has built-in power supply. See Enlarge Click to Enlarge 4 DIGIT SEVEN SEGMENT DISPLAY MODULE. MODEL IBL-IM-34 This is a 7-segment display interface module. The purpose of this module is to provide means to learn interfacing program techniques using varieties of controllers. This is an interface module to be operated with any of the Microprocessor trainers, Microcontoller trainer, PIC trainer for embedded applications or to an IBM TTL I/O card for programming. There are 4 independent displays on this module. It is possible to set any desired number (0 to 9 and special characters) on any one display or a combination of displays or all the four displays by programming a controller. For this purpose, all the BCD signal (4 bit) inputs of each display are available for interface with the controller at its I/O connector. This requires an optional controller for interface purpose and an external power supply of +5V DC@ 250mA is required to power this interface module See Enlarge Click to Enlarge LVDT FEEDBACK POSITION CONTROL TRAINER. MODEL IBL-IM-35 This is a 2nd order control system. LVDT forms part of input transducer, and stepper motor becomes the actuating element. In this trainer, simple ON-OFF control is implemented when used with Microprocessor trainer Model MPT-85. In order to allow the control action, the set point of final position of LVDT displacement forms an Input element to the controller. The controller determines how fast the desired position should reach. In order to facilitate the above objectives, an external Microprocessor trainer Model MPT-85 will act a controller. The student learns how to write a control algorithm to meet the above objective. Specifications: LVDT : ?10mm LVDT Signal conditioner: Sine generator, instrumentation amplifier, and buffer amplifier. Display: On-board, 3-? digit displacement indicator ADC: 8 ?BIT compatible with MPT-85 Stepper Motor: 2 Kg/cm2 with necessary power drivers. Built-in Power Supply Transducer assembly: The entire LVDT and the Stepper Motor is located in an ergonomically styled cabinet. Connections: using 15 Pin D-Type connector. Note: This trainer requires an external Microprocessor Trainer Model MPT-85. See Enlarge Click to Enlarge VENDING MACHINE EXPERIMENTAL INTERFACE MODULE. MODEL IBL-IM-36 This interface trainer is intended to demonstrate the methods of demonstrating the material Dispensing methods by LADDER-LOGIC program. This instrument has a common water tank and three special purpose pumps and three indicators to display the presence of 3 dispensing devices. The pumps are activated to dispense the liquid. Whenever each pump is activated a corresponding indicator is illuminated. 4 different Momentary switches provided on the PLC trainer could simulate input signal required for activation. This provides an opportunity for selecting the dispensing device. The annunciator indicator available on the PLC trainer also can be illuminated, and Legend can be written on the Annunciator window using a sketch pen to simulate what type of liquid is currently dispensed. The legend can be LEMON, COLA, TEA, COFFEE etc. PLC Ladder ?Logic program has to be activated to enable the other functions like TIMERS, FLAGS, REGISTERS etc. See Enlarge Click to Enlarge CAR PARKING LOT INTERFACE EXPERIMENTAL MODULE. MODEL IBL-IM-37 This is an experimental interface module. It is possible to simulate the presence or absence of a CAR being parked in the parking lot. This interface module makes use of three Optical interface transducers as input to simulate the presence of a car in the parking lot. Since there are four programmable annunciator display windows on the PLC trainer, any one of the annunciator displays can be programmed to display which car is parked in which position of the parking lot. See Enlarge Click to Enlarge 8279 PROGRAMMABLE KEYBOARD DISPLAY CONTOLLER INTERFACE. MODEL IBL-IM-38 This trainer uses popular INTEL 8279 Programmable keyboard / display device. This device has capability to scan 8 X 8 matrix scanned key contact switches as input device. There are many modes of scanning keyboard switches, as described by the device specifications. Keyboard: This is an input device. In this interface trainer we use 23 scanned keys and a hardware key for external Reset. The user program decides the type of scanning and the method to input the logged data from key sensors. Display: This is an output device. The device provides scanned display for LED, and other popular display devices. This trainer consists of 6 Nos. of software controlled 7 segment display with necessary buffer drivers. The student has to make an application program to log the input and output devices using necessary I/O protocol sequence as described in the device data sheet. This trainer requires an external +5 V DC@ 200mA power supply. The input output connections to and from this interface module is through a 26 Pin FRC cable. This interface module requires Microprocessor Trainer Model MPT-85 for control applications. Specifications: Input: 24 low profile feather touch keys Output: 6 numbers of software controlled 7-segment display Connector: Using 26 Pin FRC ribbon cable. See Enlarge Click to Enlarge DC MOTOR SPEED CONTROL TRAINER USING CHOPPER DRIVES. MODEL IBL-PE-10 The rotational speed of a DC motor is directly proportional to the mean value of its supply voltage when operated under pulsed condition. If the motor is operating at a frequency 'f' and at an operating voltage of say +24V DC, then the pulse amplitude from the driver has to be 24V DC under all conditions at the given frequency. Under these conditions the speed is dependent on the duty cycle of the pulses from the driver. This type of circuit provides complete speed control from minimum to maximum speeds at reasonably high torque. The trainer makes use of a chopper circuit for speed control. This trainer has all the facilities to vary the speed of the DC motor, observe wave forms at different test points in the circuit, namely at the output of oscillator, amplifier, driver, and at motor terminals. A recording of these observations in terms of amplitudes, pulse width, shape of pulses will provide a good understanding of how speed control can be achieved at different speeds. This trainer is intended to demonstrate the speed control of a permanent magnet DC motor. This motor is mechanically coupled to a Tacho-Generator. Changing the voltage of armature from 0 to 24VDC controls the DC motor speed. As the voltage varies, the armature current increases and in turn the speed increases. The change in armature voltage can be changed in this trainer Either by varying a potentiometer by DC voltage control or By pulse width modulated CHOPPER DRIVE, or It is possible to provide external pulses modulation from your circuitry also for exciting the motor. This external pulse modulation can be provided from any external controller like Microprocessor trainers Model MPT-85 or MPT-J-85 or MPT-86, Microcontroller trainer Model MCT-31, PLC trainer Model IM-29 or and Data Acquisition System Trainer Model DAS-1. See Enlarge Click to Enlarge LCD INTERFACE MODULE. MODEL IBL-LCD-1 This is an important interface module in the light of designing EMBEDDED control systems. An understanding on how to configure and manage to display messages is very vital on the LCD display. This is an alphanumeric display. It has 2 lines of 16 characters per line. This interface module has built-in power supply. Provision to alter the contrast. During experiment stage it is necessary to understand how to perform the following. Initialize the character generator RAM Initialize the Data Display RAM Clear the display How to display a stored data How to create lookup table How to edit data How to position the cursor on a line and on a specific character location How to make the cursor to blink on the next character position How to make the cursor to move left, right, UP, or down etc. See Enlarge Click to Enlarge BAR GRAPH AND DOT BAR DISPLAY MODULE. MODEL IBL-AM ? 1 The Bar graph and Dot bar displays are two independent analog meters. The full-scale deflection (FSD) is 2.4V DC. In analog meters the position of the needle indicates input amplitude. In this case it is displayed by the glow of a set of LEDs. The resolution of these meters is 120mV per LED. For all the 20 LEDs to glow the input amplitude must be 2.4V DC. The Dot Bar/Bar Graph display module has 20 LEDs for each display. They display graphically, the change in process parameters (analog). The process may be, change in temperature, pressure, flow, strain, load, speed, torque etc. Full-scale deflection (FSD) of each display is 2.4 V DC. The output of DAC module can be connected to this module to display programmable analog output. See Enlarge Click to Enlarge 4 CHANNEL ANALOG SIMULATOR MODULE. MODEL IBL-AM ? 2 Analog simulator has 4 independent voltage sources, named as 4 channel analog simulator. Output voltage of each channel can be set independently. The output voltage adjustment is by using a 10-turn potentiometer. The output is variable from 10mV to 5V DC. Parameters like temperature, pressure, flow, volume, weight, pH etc. Can be expressed in voltage and can be simulated. This module can be used as simulated input to an ADC module model IM-1, IM-2 or IM-3. This requires ?12V DC @300 mA power supply. See Enlarge Click to Enlarge 2 CHANNEL I TO V RECEIVER MODULE. MODEL IBL-AM-3 This module accepts current input in the range of 4 to 20mA from any transmitter and produces proportional voltage output. This output can be connected as input to any ADC module. There are two independent current input channels in this module. The current received from any transmitter is processed using built-in instrumentation amplifiers. Essentially this is an add-on circuit to instrumentation amplifier module. This module requires external power supply ?12V DC @ 250mA. See Enlarge Click to Enlarge 2 CHANNEL V TO I TRANSMITTER MODULE. MODEL IBL-AM - 4 This is a 4-20mA current transmitter module. This module has 2 independent current transmitter channels. Each channel accepts a variable DC voltage in the range of 0 to 5 V at its input terminals. The module produces output current in the range of 4 to 20mA. For 0V input, the output current is 4mA. For 5V input, the output current is 20mA. The output current can also be adjusted for a span of 0 to 20mA. This module requires external power supply ?12V DC @ 250mA, + 5V @ 250mA. Specifications: Input : 0 to 5V DC O utput : 4 to 20mA and adjustable Requires external power supply ?12V DC @ 250mA, + 5V @ 250mA. See Enlarge Click to Enlarge SIGNAL CONDITIONER MODULE. MODEL IBL-AM-5 This module is an amplifier system. There are two different amplifiers in a single module. The gain of each amplifier is adjustable by a 10-turn potentiometer. The signal conditioner accepts a low voltage from (1000 microvolts to 20mV) inputs, and amplifies them by a gain of 250. The signal conditioner is used whenever a transducer provides a low electric output voltage. It expects the A-D module to know the variation in the analog parameters. The control program logs the value of A-D converter and is used either for compassion or for display. See Enlarge Click to Enlarge PROGRAMMABLE GAIN DATA AMPLIFIER. MODEL IBL-AM-6 The Programmable gain data amplifier is a low level signal amplifier. The gain of the amplifier can be programmed digitally. The maximum amplified output is 5V DC. The gain data amplifier enhances the dynamic range of the system for specific analog to digital converter employed. Student learns programming for different gains. See Enlarge 1 2 [3] 4 [«Back ||Next »] Go to Top