LSI LASTEM Alpha-Log - Page 112

Alpha-Log – User manual
LSI LASTEM SRL
INSTUM_03388
Page 112 / 116
Internal measure
(barometric
pressure)
Range
300 ÷ 1100 hPa
Resolution
Typically 0.084 hPa
Accuracy
±0.15 hPa (@25 °C, 750 hPa)
±0.25 hPa (@-20 ÷ 85 °C, 300 ÷ 1100 hPa)
Long term stability
±1 hPa/year
Internal measure
(power supply)
Mode
Battery level or powering
Type
Voltage
SDI-12 input
Type
V1.1 compliant
Protections
• Opto-isolated
• Protection against self-restorable PTC fuses overcurrent
• IEC-61000-4-2 ESD 30 kV (air), 30 kV (contact)
• DATA-SDI12 line protection with gas suppressor and digital
isolation:
o 1-2 kA of impulsive current capacity tested with an
impulse of 8/20 µs as defined in IEC 61000-4-5
o Conform to ITU-T K12, IEC 1000-4-5
o Data lines isolated up to 4000 V peak and up to 2500
Vrms for one minute
RS-485 input/output
Inputs number
1
Mode
• Connection to sensors (Modbus RTU - Master protocol)
• Connection to SCADA/PLC systems (Modbus RTU - Slave
protocol)
Powering
Isolated 3 kVdc
RS-232 input/output
Inputs number
2
Mode
• Connection to input terminal block (MDMMA1110)
• Connection to communication systems (2G/3G modem, radio)
• Connection to SCADA/PLC systems (Modbus RTU - Slave
protocol)
• Connection (Com.2) to thunderstorm sensor (DQA601.1)
USB input/output
Ports number
2
Type
Host, type A connector
Mode
• External memory pen-driver connection
• Wi-Fi antenna connection (optional)
Powered and
actuated outputs
Outputs number
3 (programmable actuation)
Type
Solid state for output V Out = V In
Maximum current
1.1 A for each actuator
Mode
• External sensors powering
• Communication systems powering
• Threshold exceeded alarm devices powering
• Timer (date/time o cyclical)
Protections
400 W peak pulse at 10/1000 μs waveform
Repetition rate (duty cycle): 0.01 %.