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ERT-A2 ALERT2 Configuration Manual
Revision 1.0
44
3.
Unit will indicate starting process by short flash of all four input LEDs and then progress of
writing file with input LED scan through 1 to 4. DO NOT REMOVE USB stick during writing
process.
4.
Completion is indicated by all four input LEDs with come on and go out.
General Specifications
Operation
Modes-Topology
Field, Repeater and Receiver station unit types
Input and Output
Discrete input/output
4 digital I/O (discrete/pulsed, rain or river encoder)
On-state voltage: <1 Vdc
Off-state voltage: >2 Vdc
Wetting current: 30µA
Minimum input pulse width 1ms (active input)
Analog Inputs
2 single ended analog inputs configurable mA
0-20mA current loop (under/over range)
16 bits resolution
Impedance < 10
0Ω
Sensor Loop Power
Analog: 24Vdc, max 50mA
SDI-12: 12Vdc, max 500mA
SDI-12 (v1.4)
1 loop: max of 52 configurable variables or sensors
M or R command and CRC configurable
Data Rate: 1200 bps, 7 data, 1 parity
Heater Output
Open Collector output (active close to ground) available to allow
internal heating in very cold environments. ON @ -10
o
C OFF @
0
o
C, 2A max
GPS (Optional)
Time clock synchronization for logging/ALERT2
GPS antenna: SMA Female (LNA power)
Protocols and Configuration
User configuration
Secure, user friendly, device agnostic, menu-based
Remote (over-the-air) access: Bluetooth BLE
Local Access: USB or RS232 (legacy)
Configurable
Parameters
ALERT1 (field station, receiver only),
ALERT2™,
field/repeater/receiver station, communications setup, unit ID,
reporting times, input configuration, analog loop power warmup,
date/time, SDI sensor power, logging
RS-485 (Future)
Note 3
ALERT1 input (Repeater only, ALERT2 Consolidation mode)
ALERT2 output (Base Receiver output to decoder)
ALERT2 redundancy (Repeater Gateway)
Configurable 300-115200 baud/ parity/ stop
LED Indications & Diagnostics
LED Indication
Power/OK, Radio TX/RX, Config Enabled, Maintenance Mode
Push Buttons
Front Panel: Maintenance mode/Send data
Internal Test: Maintenance mode/send data/save logged data to
USB/Firmware update
Internal Boot: Boot or Reset unit (IO values preserved)
Reported Values
Содержание ERRTS ALERT2
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