SZ-7531T Temperature Controller | Dual Set Point with Drain Valve & HGSV Control
The SZ-7531T Temperature Controller is designed for air dryers, featuring dual set point control, fan delay protection, hot gas solenoid valve (HGSV) control, and drain valve operation with programmable ON/OFF cycles.
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Product Summary
The SZ-7531T Temperature Controller is a specialized dual set point controller for air dryers, integrating fan protection, HGSV management, and drain valve control in one unit. With touch-sensitive keypad, multiple inputs/outputs, and programmable drain cycles, it ensures precise and reliable dryer performance.
Key Features
Dual set point controller for air dryers
Drain valve + hot gas solenoid valve (HGSV) outputs
2 × NTC probe inputs for accurate monitoring
Temperature range: –45°C to +99°C / –45°C to +100°C
Resolution: 0.1°C / 0.5°C / 1°C (settable)
Fan ON/OFF time delay for protection
Auto/Manual drain valve operation
Programmable drain ON time (minutes & seconds) and OFF time (hours & minutes)
Digital inputs for fan, HGSV, and drain valve fault detection
Prokey support for quick parameter upload/download
Touch keypad for user-friendly operation
Auto operation during sensor failure
Password protection for parameter settings
High & low temperature logs
Compact panel mount housing: 78 × 36 × 80 mm
Applications
Industrial air dryers
Refrigeration-based air drying systems
Compressed air treatment plants
Dehumidifier units with drain & HGSV
Product Benefits
Reliable control → dual set points ensure precise temperature regulation
Comprehensive safety → fan delay, fault detection, and error recovery
Programmable drain valve → customizable ON/OFF cycles for efficiency
Energy savings → optimized fan and HGSV management reduces power usage
User-friendly → touch keypad, Prokey support, and clear LED display
FAQs
Q1. What makes SZ-7531T suitable for air dryers?
It provides dual set point control, HGSV output, and drain valve management, all essential for air dryer performance.
Q2. Can the drain valve be programmed?
Yes, both ON time (minutes & seconds) and OFF time (hours & minutes) can be set.
Q3. Does it protect the fan?
Yes, it has a settable ON/OFF delay for fan protection.
Q4. Does it support parameter backup?
Yes, via Prokey upload/download for quick setup.