GSAS Logic Controller Interface

The GSAS Logic Controller Interface (IF-LC) is a programmable logic control module that enables microprocessor trainer kits to implement combinational and sequential logic functions through software via the Programmable Peripheral Interface (PPI). The module provides a set of input switches and LED indicators, all interfaced to the trainer’s I/O ports through the standard bus connector. Students program the microprocessor to read input states, apply logic conditions (AND, OR, NOT, XOR, latching, timing), and drive LED outputs accordingly.

This module bridges the gap between digital logic theory and practical implementation. Students begin with simple combinational logic, implementing truth tables for AND, OR, and NAND gate functions using input switches and LED indicators, then progress to sequential logic with latching, interlocking, and timer-based sequencing. Advanced experiments include safety interlock implementation and multi-step process sequencing where LED outputs must follow a specific timed sequence based on input conditions. These experiments introduce logic control concepts within the familiar microprocessor lab environment.

Specifications

Parameter	Value
Part Number	IF-LC
Inputs	Multiple switch inputs
Outputs	LED indicators
Logic Implementation	Software-defined via PPI
Scan Cycle	Programmable input scan, logic execute, output update
Bus Interface	Standard GSAS trainer bus connector
Power	Supplied from trainer kit

Lab Experiment Coverage

Experiment Category	Topics
Combinational Logic	AND, OR, NOT, XOR implementation via software
Truth Tables	Input/output mapping, multi-input logic functions
Sequential Logic	Latching, set/reset, toggle, state memory
Interlocking	Safety interlock logic, mutually exclusive outputs
Timer Functions	On-delay, off-delay, pulse timer implementation
Process Sequencing	Multi-step timed LED output sequences

Compatibility

The IF-LC module connects to all current GSAS microprocessor trainer kits through the standard expansion bus connector:

• GSAS 85A Microprocessor Trainer
• GSAS 86E Microprocessor Trainer
• GSAS 51E Microcontroller Trainer

No additional wiring or external power supplies are required, the module draws power and bus signals directly from the trainer.

Why GSAS

GSAS manufactures the Logic Controller Interface in Bangalore as part of its motor and control peripheral module range. Understanding how software can implement logic control via PPI is a foundational concept in embedded systems education, and the IF-LC module provides a hands-on demonstration of this principle using the familiar microprocessor lab environment. The module’s switch-LED architecture is deliberately simple and transparent, allowing students to focus on the logic programming. The GSAS education products team provides lab manual content for logic control experiments aligned with Indian university embedded systems and industrial automation curricula.

Products are available for immediate purchase through the GSAS online store (“Buy on Store”) or through direct engagement for institutional and volume orders (“Request Volume Pricing”).