TCS SZ1025b VAV Box Controller

TCS SZ1025b VAV Box Controller

TCS SZ1145 General Purpose Monitor

TCS SZ1145 General Purpose Monitor

TCS SZ1143b General Purpose Controller

General Purpose Micro Controller 1 analog output, 2 digital outputs, LCD display
Availability: In stock


The SZ1143b is a microprocessor-based general purpose controller designed for use in a wide variety of applications: general control, remote setpoint control, general input reset ratio control and differential input (i.e. temperature, pressure, humidity, etc.) control.


• Stand-alone or network operation

• Two 4 to 20 mA analog inputs suitable for a broad variety of transducers

• Two digital inputs for switches, alarms, clocks, etc.

• One 4-20 mA modulating output

• Two relay outputs

• One relay output configurable to work with analog input one or two

• Adjustable P+I+D control on modulating output

• Adjustable offsets and differentials on relay outputs

• Application sequences include:

• Humidification

• Dehumidification

• Dew Point Control

• Differential Temperature

• Differential Pressure

• Static Pressure

• Hot or Chilled Water

• Hot or Chilled Water Reset


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 +/- 20%
Inputs: Two 4-20 mA analog and two digital (dry contact)
Outputs: One 4-20 mA DC analog and two digital (SPST dry contact, 24 VAC @ 1 A)
Analog input impedance: 250Ω Max.
load resistance (analog output): 600Ω
Common mode rejection: 100 db @ 60 Hz
Power consumption: 5 VA
max.Specifications subject to change without notice.

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