Refrigeration Temperature Monitor
SZ1144Description
The SZ1144 is a microprocessor-based refrigeration monitoring and alarm interface. It can monitor up to four 1000Ω platinum RTD temperature sensor inputs and up to two analog inputs.
Inputs:
Four platinum RTDs; range: –40 to 60°F (40 to 15.6°C) two 4 – 20 mA analog, and two digital (dry contact)
Outputs:
One digital (SPST dry contact, 24 VAC @1A), configurable
Display:
32-character LCD
Communications:
RS485, half-duplex
Features
- Stand-alone or network operation
- Independently programmable high and low limits for each input
- Independently programmable manual or automatic alarm reset
- Change of state factor with programmable hysteresis
- 32-character LCD display
- Status LEDs
- Relay output to activate additional auxiliary communication devices or external alarm circuit
- Four RTD temperature inputs
- Two 4 – 20 mA analog inputs suitable for a broad variety of transducers
Specs & Docs
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 +/- 20%
Inputs: Four platinum RTDs, range: -40 to 60°F (-40 to +15.6°C) two 4-20 mA analog and two digital (dry contact)
Outputs: One digital (SPST dry contact, 24 VAC @ 1 A) configurable
Analog input impedance: 250 Ω
Common mode rejection: 100 db @ 60 Hz
Power Consumption: 5 VA max.
Specifications subject to change without notice.
