TCS SZ1143b General Purpose Controller

TCS SZ1143b General Purpose Controller

TCS SZ1025b VAV Box Controller

Micro VAV Controller
Availability: In stock


The SZ1025b is a microprocessor-based controller designed for VAV terminal unit applications.


• Stand-alone or network operation

• Zigbee wireless ready

• 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


General Accuracy:+/- 0.5%

Programming:EIA RS485 interface

Display:32- Character LCD

Communications:RS485, half duplex

Memory backup:Non-volatile EEPROM, no battery required

EnvironmentalOperating 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):600Ω

Common mode rejection:100 db @ 60 Hz

Power consumption:10 VA max

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