F4-4LTC Four-Loop Temperature Controller Module Manual

This document describes the F4-4LTC, an intelligent DL405 PLC module that combines four single-loop PID temperature controllers into one unit, accepting RTD or thermocouple inputs and providing solid-state relay outputs for heater or chiller control. It details the module's operation, including automatic tuning, alarm capabilities (high/low/deviation/broken transmitter), and how it interfaces with the DL405 CPU via V-memory for configuration and monitoring.