Product details
Product Description
The SZ-7558T Digital Temperature Controller is designed for HVAC/R and industrial cooling applications, offering precise temperature control with differential (hysteresis) operation and integrated alarm functionality. It ensures stable system performance by switching outputs based on set point and temperature variation.
This controller is a two-relay unit with an inbuilt high-capacity power relay, allowing direct compressor control without the need for an external contactor in single-phase systems. It also includes a dedicated alarm relay for high and low temperature alerts, enhancing system safety and monitoring.
The SZ-7558T uses an NTC sensor for accurate temperature measurement and supports configurable parameters such as differential, delay, and control logic. It includes advanced protection features like compressor delay and power-on alarm delay, ensuring reliable and safe operation in demanding environments.
With a touch-sensitive interface, LED display, and compact panel mount design, the controller provides easy operation and dependable performance across panel air conditioners, oil coolers, and industrial HVAC systems.
Key Features
Differential (hysteresis) temperature control
Dual relay output (compressor + alarm)
Inbuilt high-capacity relay (up to 20A compressor load)
Built-in alarm output for high/low temperature
NTC sensor input for accurate sensing
Compressor protection with time delay
Power-on alarm delay feature
LED display with touch interface
Panel mount design with IP65 front protection
Applications
Panel air conditioners
Oil coolers
Package AC systems
Industrial cooling systems
HVAC/R equipment
FAQs
Q1: What is the difference between SZ-7556T and SZ-7558T?
SZ-7558T has an inbuilt high-capacity relay (up to 20A), allowing direct compressor control without a contactor.
Q2: Does it support alarm functionality?
Yes, it includes a dedicated alarm relay for high and low temperature conditions.
Q3: What type of sensor does it use?
It uses an NTC temperature sensor for accurate temperature measurement.
Q4: What is the temperature range?
It typically supports a display range from around -45°C to +100°C depending on configuration.
