Lakshmi Instruments & Automation Ayanavaram, Chennai, Tamil Nadu

Micro controller based stepper motor driver designed for various applications to suit different rated stepper motor. Wherever precise movement is required it finds an importance. It has the facility to set the distance to be moved, the direction of movement & the speed required .it’s intelligence to detect the end of movement to reverse the direction for any obstruction also available. Front panel programmable set values, which generates necessary control output through relays for any process application.

We are offering server a/c changeover programmable timer etc. We are offering server a/c changeover programmable timer. server room programmable timer is a micro controller based (4 digit) timing selectable in seconds, minuets, hours in rear side by jumper. The channels available is two and expandable as per user requirement. This unit has the facility to set the changeover timing of ac loads and necessary control using contactors assembly in a wall mounting panel

We offer Sequential Controller for Silo Control Panel. Specification for silo: a. 16 channels as a standard output. Higher or lower number of output channels may be provided. b. on time: 1-9999 milli seconds, off time 1-9999 seconds, pause time from 1sec to 9999 sec. c. display: a high, 8 nos of 7 segment red led display. d. output: 1 no relay contact per channel. All output contacts are rated for 3 amp. @ 230 vac on resistive load. e. operating sequence: the operating sequence of the output load or solenoids is from first to last channel. f. remote start: the remote nc contact provided for sequence to start. g. remote stop: the remote nc contact provided for sequence to stop and all the loads are disconnected. After resuming remote start, the sequence shall resume from the 1st channel. h. channel skip facility: unwanted channel can be skipped through programming. i. manual pulsing: generally timer works in auto mode. Manual pulsing mode is also provided for cleaning the bags one by one in manual mode. The output channel remains on till the pulsing key is released. i. communication facility: rs 485 communication provided (on time, off time and the pause time may be programmed from the distance of 2 kms using rs485.

It is a micro controller based indicator cum controller to indicate & control temperature at the desired point. Front panel programmable keypad arrangement for data entry to set temperature which generates necessary control output through relays or solid state relays. The required alarm indications in the front panel and control output are available on back panel. This unit designed to indicate / control temperature with rtd / thermocouple input as sensors. It supports rs232c / 485 communication interfaces to take periodical printouts of temperature parameters and for necessary data logging (on request).

Rpm indictor / controller is a micro controller based (6 / 4 digit) indicator. This unit has the facility to indicate the rpm for motors & generators or any rotating media. Front panel programmable two set values and control outputs generation for necessary control to take necessary action. Single input or multiple encoder inputs for feed back in indicate rpm are available. Proximity (magnetic) or photo electric pickup as sensor input. Sample time less than 2 second is maintained & one or two relay output for external control.

Real time digital programmable timer is a micro controller based lcd timer available in real time format i.e. Hrs, mins, secs and the channel connectivity for 4 / 6 / 8 / 12 /16 as per user specification. This unit has the facility to set the timing for individual channels and necessary control output generation using solid state relays for higher load current connectivity and to avoid noise interruption. This timer mainly used in offices, factories, apartments, industries etc., to save the energy loss in various points by placing organized zones group for distribution of power to avoid wastage of electrical power. For user convenience & requirement the number of channels tailor made to 4, 6, 8, 12, 16 and even more.

We offer Rapping Sequential Timer. Rapscan is a compact advanced microcontroller based rapping sequential timer used in electrostatic precipitator, which is a clean air pollution control device. To improve collection efficiency and ensure proper functional use of the rapper, proper sequencing and predetermined hammering accomplished by this controller. Esp set up for a rapping system functionally applied to the collection plates to dislodge the collected dust particles and finally it is handled by bag filters. A falling weight or fixed rotating hammer controlled by the rapping timer which raps the collection plates, causing vibration that knocks off the dust layer from the collecting electrodes. The functional parameters available in rapscan are programmable via four key pad assembly in the front panel. All programmed values are stored permanently in non-volatile memory (eeprom). Password protection is provided so that set parameters cannot be tampered by authorized persons. Channel skip function is applied by setting zero in the parameter setting to disengage the unused channels or rappers. It supports auto mode and manual mode of operation for user convenience and maintenance purpose. The real time setting & program numbers storage facility for multiple programs retentions are possible in our controller using non volatile memory. The communication facility extended using rs485 link for scada or plc for further control & processing the data.

Micro controller based sequential timer has the facility to support 4 / 8 /16 channels corresponding 4 / 8 / 16 control outputs for multiple load. This unit has the provision to count the time sequences in hours & minutes & seconds and has the facility to set the required value in the same format. Front panel programmable keypad arrangement for data entry and the necessary control output available at the rear side. Single shot mode or cyclic mode and individual channel enabling or disabling is possible throughprogramming. The programmed set values are stored in eeprom. Communication through rs 485 output also available on request.

It is a micro controller based technology and having 6 digit 7 segment display or lcd display on request (optional) for output. The front panel programmable 4 key pad arrangement for data entry i.e., set values. It has the facility to set field programmable inputs 4 ma to 20ma, 0 ma to 20 ma, 0 to 2 volts, and 0 to 4.99 volts. Tolerance selection possible in the order 0.1 to 50 % of the set values & process value accuracy in the range of 0.01 of the full scale value. Two set points for low set and high set (if required) and the output low and high indication through front panel led's. The output relay contact rated for 230 volts / 3 amps and the optional rs232/rs485 modbus communication protocol output provided on request.

We are offering multi channel temperature scanner. it is a micro controller based multi channel scanner cum controller, which can measure, indicate and control temperature at different locations using the control outputs. It is available in different models, to suit the no/.of channels requirement and the various sensors like rtd, thermocouple etc., and the no of channels varies from 8 / 16 / 24. It ensures excellent linearity through smart linearization technique. Front panel programmable set value generates the necessary control output by scanning process temperature. The individual or grouped channel control output through relay outputs as per requirement & alarm indications available on front panel. The control action one for alarm and another for trip are maintained. It supports serial communication to take periodical print outs of process parameters and the necessary data logging for analysis.

Our Digital Programmable Timer is a micro controller based timer available in seconds, minuets, hours in (4 / 6 / 8 digit) versions. This unit has the facility to set the timing and necessary control output generation for control action. The timer operation mode has the facility to count timing in both up or down counting. Front panel programmable set values for data entry and necessary control output at the rear side.

It is a micro controller based counter which accepts input as pulse input / event generation / object counting used in the measurement objects and events or engineering units like length measurement in 4 / 6 / 8 digit version. This unit has the facility to count and control the event generation or object detection involved in various operations in industrial atmosphere. The operation mode has the facility to count in both up or down counting selected thorough programming. The front panel programmable set value generates the necessary control output at the rear side. It has the data storage facility for storing the set values. The rs 232c communication output also available on request. (eg. Length measurement, batch counting, object counting etc.,).

We offer Conveyor Belt Controller. Specification for conveyor belt controller or material handling system controller: a. 16 channels as a standard output. Higher or lower number of output channels may be provided on request. B. Sequence starts from 1st channel motor then it moves to 2nd channel motor and carried out up to the last channel in pre programmed time duration between 1 to 9999 sec for each channel. C. Display: â½â�� high, 8 nos of 7 segment red led display d. Output: 1 no relay contact per channel. All output contacts are rated for 3 amp. @ 230vac on resistive load, higher load capacity achieved by the way of activating contactor by using the relay output available within the controller. E.. Operating sequence: when the system is in the start mode the operating sequence of the output load or motors is from first to last channel and if it is in the stop mode the operating sequence of the output load or motors is from last to first channel f. Remote start: the remote nc contact provided for sequence to start. G. Remote stop: the remote nc contact provided for sequence to stop. H. Channel skip facility: unwanted channel can be skipped through programming.

We offer Bag Filter Controller. Bag filters are a cost effective dust extraction system designed and engineered to meet the stringent laws of pollution control. With the users becoming more and more aware of the importance of environmental hygiene, there has been a change in the outlook of industries towards keeping the place of work dust and pollution free. The regulations on emissions for iso and other certifications also have accelerated the momentum of achieving clean working environment in factories a. 16 channels as a standard output. Higher or lower number of output channels may be provided. b. on time: 1-9999 milli seconds, off time 1-9999 seconds, pause time from 1sec to 9999 sec (programmable at site). c. display: â½â�� high, 8 nos of 7 segment red led display d. output: 1 no relay contact per channel. All output contacts are rated for 3 amp. @ 230vac on resistive load. e. operating sequence: the operating sequence of the output load or solenoids is from first to last channel. f. remote start: the remote nc contact provided for sequence to start. g. remote stop: the remote nc contact provided for sequence to stop and all the loads are disconnected. After resuming remote start, the sequence shall resume from the 1st channel. h. channel skip facility: unwanted channel can be skipped through programming. i. manual pulsing: generally timer works in auto mode. Manual pulsing mode is also provided for cleaning the bags one by one in manual mode. The output channel remains on till the pulsing key is released.

In any plant, when a process parameter goes to abnormal limit, the operator has to be alerted immediately, so that he can take corrective action to bring the parameter back to normal. And also when the parameter returns to normal, the operator should be alerted immediately. This task of bringing the attention in such conditions is accomplished by alarm annunciation system. Our annunciator is a microcontroller based system and has the operating sequences reset, test, mute, and ack as input and individual output indication for each channel for status indication. It is available in three models as table, panel mounting & wall mounting with window indicator & led version. This annunciator has the facility to interact with computer for data logging and data retrieval and data analysis through visual basic available on request