General Purpose Monitor


The SZ1145 is a microprocessor-based monitoring
and alarm interface designed to monitor up to four
1000 Ω platinum RTD temperature sensor inputs
and up to two 4-20 mA inputs.


• 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
• 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

Call to order:


Specs & Docs


Accuracy: +/- 0.5%
Programming: EIA RS485 interface
Display: 32 character LCD
Communications: RS485, half duplex
Memory backup: Non-volatile EEPROM, no battery required
Operating temperature: 32 to 131°F (0 to 55°C)
Operating humidity: 0 to 100% RH, noncondensing
Storage temperature: 14 to 140°F (-10 to 60°C)
Supply voltage: 24 VAC +/- 20%
Inputs: Four platinum RTDs, range: 20 to 120°F (-6.7 to 48.9°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.