SZ-7518 Series Temperature Controllers | RS232 Connectivity | 3 Relay Outputs & Digital Inputs

Product Summary

The SZ-7518 Series is a versatile line of temperature controllers engineered for dairy and industrial refrigeration. With 3 relay outputs (compressor/agitator/fan), RS232 connectivity, and digital inputs for fault detection, these controllers ensure precise, reliable, and user-friendly operation.

• SZ-7518T → Optimized for bulk milk chillers, featuring compressor + agitator control, door open/compressor fault detection, and programmable agitator ON/OFF cycles.

• SZ-7518P → A general-purpose temperature controller with compact design, multiple relays, IP65 frontal protection, and EEPROM memory for cold rooms, freezers, and labs.

Key Features

• 3 Relay Outputs (compressor, agitator, fan/heater as per configuration)

• RS232 Modbus RTU connectivity for industrial integration

• Digital Inputs (DI) for compressor fault, door open, or auxiliary status

• High-resolution monitoring (0.1°C, 0.5°C, or 1°C selectable)

• LED digital display for real-time temperature indication

• Programmable ON/OFF delay for compressor protection

• Prokey support for parameter upload/download

• Password-protected parameters for security

• Auto operation in case of sensor failure/error

• High & low temperature logging

• IP65 frontal protection (SZ-7518P)

• EEPROM memory for secure data storage (SZ-7518P)

Applications

• Bulk Milk Chillers (dairy industry)

• Cold Rooms & Freezers

• Refrigerated storage tables

• Industrial refrigeration & chilling systems

• Laboratory temperature-controlled equipment

Product Benefits

• Reliable cooling – supports multiple relays for compressor/agitator/fan

• Versatile use – ideal for both dairy and industrial refrigeration setups

• Fault protection – digital inputs monitor compressor & door conditions

• Industrial-ready – Modbus RTU communication for automation setups

• User-friendly – LED display, touch keypad, password security

• Durable – IP65 frontal protection & EEPROM data storage (SZ-7518P)

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FAQs

Q1. What’s the difference between SZ-7518T and SZ-7518P?
SZ-7518T is dairy-specific (bulk milk chillers) with agitator and compressor control, while SZ-7518P is for general refrigeration/industrial use with IP65 protection.

Q2. Does it support RS232 communication?
Yes, both variants support RS232 Modbus RTU protocol.

Q3. How many relay outputs are available?
Both variants offer 3 relay outputs (Compressor, Agitator/Fan, Heater/Defrost depending on configuration).

Q4. Is it suitable for cold rooms and freezers?
Yes, the SZ-7518P variant is ideal for industrial freezers, cold rooms, and labs.

Q5. Can parameters be uploaded/downloaded?
Yes, via Prokey support for quick configuration.