AL200

Name: AL200
Brand: Campbell Scientific
SKU: 28817
Availability: Discontinued

ALERT2 Encoder, Modulator, and Sensor Interface

AL200

Retired

ALERT2 Encoder, Modulator, and Sensor Interface

No longer available to order

This product is retained for service, documentation, and compatibility information.

Replaced by

AL200X
ALERT and ALERT2 Modem and Sensor Interface

Model:: AL200
Item Number:: 28817
Warranty:: 1 year

Overview

The AL200 is an ALERT2 encoder and modulator that supports ALERT2 and ALERT-concentration services. It meets the ALERT2 standards maintained by National Hydrologic Warning Council (NHWC) and ALERT Users Group (AUG). ALERT2 improves the accuracy and performance of flood warning systems and software, by providing you with faster data transfer, forward error correction, and a TDMA architecture.

With integrated sensor inputs, the AL200 allows you to create a minimal ALERT2 transmitter/station, decreasing the cost of a typical flood warning system. Combining the AL200 with a Campbell Scientific data logger provides enhanced sensor support, user-defined logic and control, and data logging capabilities.

Key Advantages

ALERT2 Ready
Improved accuracy and performance for flood warning systems

Technical Description

Channels Available and Their Functions

P1: Tipping Bucket / Switch Closure Count Accumulator
SE1: Single-ended Analog Input, millivolt or milliamp
C1: Digital for limited SDI-12
SW12: Switched power for powering sensors
G: Ground

ALERT2 Reporting

When used standalone, the AL200 can generate time and event driven reports for Battery, Clock Status, Tipping Bucket, Analog Input (mV or mA), Digital (SDI-12).

Benefits

Easily configurable with graphical, point-and-click software
Integrated sensor inputs for greatly reduced station cost
Onboard measurement of supply voltage, clock/GPS quality
Event or schedule driven reports for battery, clock, tipping bucket, voltage, current, SDI-12, high/low state
Screw terminals for power, radio, and sensors for easy cabling
Easy access test features for transmission, radio power, and alignment
Support of encrypted ALERT2 messages; support of 250-millisecond slots

Specifications

Power Connector: Two-wire, 0.15-in. pitch removable terminal
(reverse polarity protected)
Power Requirements: 9 to 18 Vdc
Configuration: Device Configuration Utility over USB
(settable modulation levels using Device Configuration Utility)
LEDs: GPS, Serial, Radio
(RS-232 and CS I/O share serial activity LED.)
CS I/O Port: SDC 7, 8,10, or 11
(multiplexed with on-board sensor interface)
RS-232 Port: DCE
USB Port: Micro-B
Temperature Range: -40° to +60°C
Communication Rate: 1200 to 115,200 bps
(RS-232 DCE Port)
9600 to 57,600 bps
(CS I/O Port)
Current Drain: 1.5 mA
(@ 12 Vdc when idle)
40 mA
(@ 12 Vdc during GPS fix)
35 mA
(@12 Vdc during transmit)
Timekeeping Setting via GPS: ±61 μs
Drift: ±0.17 s/day
(without GPS sync, 40°C temperature change)
Analog Input (SE1) Sensor Interface: 0 to 5 Vdc
(16-bit ADC; millivolt or 4 to 20 mA selectable)
Protocols Supported: ALERT(1) and ALERT2
SMA Connector: Active GPS socket (female) antenna
Test Button: Test transmit and tone
Dimensions: 16 x 7.7 x 2.2 cm
(6.3 x 3.0 x 0.9 in.)

Sensor Interface

Channels Available: Switch closure (P1), single-ended analog (SE1), limited SDI-12 (C1), switched 12 V, ground
Analog input (SE1): 0 to 5 Vdc, 16-bit Adc
(millivolt or 4 to 20 mA selectable)

Radio Interface

Channels Available: TX, PTT, switched battery, ground
RCFSK Modulation: 100 to 1000 mV, ±50 mV
(software selectable)

Standards

ALERT2: ALERT2 IND API Specification Version 2.0
(as released by the ALERT2 Technical Working Group dated June 2020)
Compliance: RoHS and CE
Product Standard: EN 61326-1:2013
Test Standards: IEC 61000-4-2, Electrostatic Discharge Immunity
IEC 61000-4-3, Radiated RF Immunity
IEC 61000-4-4, Electrical Fast Transients Immunity
IEC 61000-4-5, Surge Immunity
IEC 61000-4-6, Conducted RF Immunity
CIPSR 11, Class B Emission