TCS SZ1025b VAV Box Controller

Micro VAV Controller Description The SZ1025b is a microprocessor-based controller designed for VAV terminal unit applications. Features:   • Stand-alone or network operation • Built-in velocity pressure sensor with K-factor correction • Pressure dependent or pressure independent operation • Capable of controlling series or parallel fan- powered boxes • Offers two independent modulating outputs • Adjustable P+I+D control of modulating outputs • Interface available for tri-state actuator motors • Separate heating and cooling minimum and maximum CFM settings • Four independent dry contact outputs • Remote setpoint capability • Supply air sensor input • Two independent digital Inputs   SPECIFICATIONS:   General   Accuracy: +/- 0.5% Programming: EIA RS485 interface Display: 32- Character LCD Communications: RS485, half duplex Memory backup: Non-volatile EEPROM, no battery required   Environmental   Operating temperature: 32 to 131°F (0 to 55°C) Operating humidity: 0 to 100% RH, non-condensing Storage temperature: 14 to 140°F (-10 to 60°C)   Electrical   Supply voltage: 24 VAC Inputs: Two platinum RTDs, Two digital (dry contact) Range: Room Temp: 40 to 90°F Supply Air Temp: 50 to 150°F Outputs: Two 4 to 20 mA analog, Four digital (SPST dry contact, 24 VAC @ 2 A), QE25: four triacs (24 VAC @ .5 A) Max. load resistance (analog output): 600 Ω Common mode rejection: 100 db @ 60 Hz Power consumption: 10 VA max   Specifications subject to change without notice.   Datasheet Product Manual