Refrigeration Controller
SZ2141Description
The SZ2141 is a microprocessor-based refrigeration controller and alarm interface. It can control three coolers or freezers at once and monitor up to six additional refrigeration appliances.
Inputs:
Six platinum RTDs; range: –40 to 160°F (–40 to 71.1°C) five 4 – 20 mA analog, and six digital (dry contact)
Outputs:
Nine digital (SPST dry contact, 24 VAC @1A), configurable
Communications:
RS485, half-duplex
Features
- Stand-alone or network operation
- Monitor’s compressor and door status
- Independently programmable high and low limits for each input
- Independently programmable manual or automatic alarm reset
- Change-of-state factor with programmable hysteresis
- Status LEDs
- Relay output to activate additional auxiliary communication devices or external alarm circuit
- Five analog inputs suitable for a broad variety of transducers
- Programmable defrost cycles with time or temp termination
- Monitoring inputs for pressure or temperature
Specs & Docs
Specifications:
General
Accuracy: +/- 0.5%
Programming: EIA RS485 interface
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: Six platinum RTDs, range: -40 to 160°F five 4-20 mA analog and six digital (dry contact)
Outputs: Nine digital (SPST dry contact, 24 VAC @ 1 A) configurable
Analog input impedance: 250 Ω
Power Consumption: 15 VA max.
Specifications subject to change without notice
