SZ2144
Large Refrigeration Monitor
Description
The SZ2144 is a microprocessor-based refrigeration monitoring and alarm interface designed to monitor up to six temperature sensor inputs and up to five analog inputs.
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
- Status LEDs
- Relay output to activate additional auxiliary communication devices or external alarm circuit
- Six RTD temperature inputs
- Five analog inputs suitable for a broad variety of transducers
- Options for thermistor temperature and 0 to 5V pressure inputs
- Monitor liquid line, suction and discharge temperatures
- Monitor suction line pressure
Call to order:
1-800-288-9383
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: (3) @ -40 to 160°F or -20 to 120°F (if using thermistor) and (3) @ 20 to 220°F two 4-20 mA plus three 0-5V analog and eight digital (dry contact)
Outputs: One digital (SPST dry contact, 24 VAC @ 1 A) configurable
Analog input impedance: 250 Ω (AI1-2); 10k Ω (AI3-5)
Power Consumption: 15 VA max.
Specifications subject to change without notice