Xylem SIT65 User Manual

Global Water Instrumentation

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SIT65 Users Manual

Internet Accessible Satellite Telemetry Solutions

Global Water

International : [phone], Fax : [phone]

Publication Number 39200712
01-850

Instrumentation, Inc.

151 Graham Road

P.O. Box 9010

College Station, TX 77842-9010

Telephone : [phone]

e-mail : [e-mail]

Global Water Instrumentation

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Introduction ...................................................................... 3

Controller Layout ............................................................. 4

Analog Inputs .................................................................... 5

Digital Inputs .................................................................... 6

Digital Control Outputs ................................................... 7

Time Stamps and Latency Time ...................................... 8

Real-Time Time Stamp .................................................... 9

Power Consumption ......................................................... 9

Battery Voltage Monitor ................................................ 10

Solar Power Systems ...................................................... 10

Station ID and Sensor Offsets ........................................ 12

Sensor Data Format ........................................................ 13

Calibration Numbers ...................................................... 13

Alarms ............................................................................. 14

Installation ...................................................................... 14

Troubleshooting .............................................................. 16

Technical Support: ......................................................... 18

Appendix A: Spec i f ications ........................................... 19

Appendix B: Adder and Multiplier Numbers ............. 20

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Introduction

Thank you for the purchase of a Global Water SIT65 Satellite Telemetry Station.
This instrument has been quality test ed to provide you with accurate and reliable
operation for your remote monitoring needs. We are confident that you will find this
product to be a valuable asset to your applications . Should you require any
assistance, our technical staff will be happy to help.

The SIT65 Field Station is a cost effect iv e and complet ely self-contained system for
relaying analog and digital sensor data from the most remote locations around the
world to any computer connected to the internet. Up to 8 analog inputs are available
in a number of configurations and up to 5 digital I/O channels that can be
programmed as input counters, s tatus inputs or control outputs. A separate battery
voltage monitor is provided which can be very us eful when monitoring system
performance, especially when using solar power. A VHF radio modem and antenna
is included for accessing the satellit e network and two different databases are
provided for viewing your data. No complicated setup or antenna alignment is
required, just an unobstructed view of the sky.

The satellite network that the SIT65 communicates with is owned and operated by
Orbcomm. With over 30 low-earth orbiting satellites, they provide a constantly
rotating and complete coverage of the entire Earth. Ground stations spaced all
around the world receive the data f r om t hese satellites and relay it via the internet to
each of two separate databases. These databases hav e different appearances and
features so accounts are provided to our c us tomers for both. They are also located
in separate geographical locations and have different IP addresses; which provides a
higher level of redundant internet ac c es s and data storage.

The system is programmed at the factory to transmit at regular intervals from every
few minutes to several hours apart dependin g on the application. The controller is
also able to send additional alarm transm is s ions w hen any of the digital inputs
change state. The databases allow the set ting of threshold levels that will provide
email and text message notificat ion w hen these thresholds are exceeded. Alarms
levels can be set for any of the analog or digital sens or s .

The Orbcomm network charges fees based on the amount of data transmitted.
There are many input channel options availab le and when combined with different
transmission intervals, alarm trans missions and control commands; a wide range of
data charges can occur. There is always a balance bet ween the number of sensor
channels enabled, the transmission int er v al, and the subscription fees. These fees

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Analog 1

Analog 4

Analog 5

Data Port

Antenna

Configuration Jumpers

Analog 8

Battery

Control Outputs

Charger Input

Digital

1

Digital

4

Station ID#

Radio Name

Test Button

are rarely more than the cost of recovering dat a from even slightly remote locations,
but they should be considered. For mor e infor m ation on applications and
subscription fees, please consult Global Wat er .

Each station is identified by a unique Radio Na m e and S tation ID# which are used by
the satellites for communicating with t he field station. These numbers can be found
on the documentation provided with the sy s tem, or on labels placed on the radio
modem and controller board. Have these num bers available when contacting Global
Water for technical support.

The SIT65 hardware is provided in a NEMA 4 rated hinged and lockable instrument
enclosure with a microprocessor based c ontroller, radio modem, 5Ahr battery,
antenna with 16 feet of cable, and mounting ha r dw ar e.

Controller Layout

Input

Input

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Analog Inputs

There are provisions for up to 8 analog inputs . The number of enabled inputs is
factory programmable but the inputs can be configured by the user as 0-20mA, 0­1mA, 0-500uA, 0-5VDC or 0-10VDC. To conserve power, the sens or s connect ed to
these inputs are usually switched on only when r eadings ar e being taken, the sensor
warm-up time. This warm-up time is a factory programmed setting but the voltage
powering the sensors during this time is user configurable for 5V, 12V or 18V
switched; or 12 volts continuous. The sens or warm-up time setting applies to all
analog channels. Setting the configuration jumpers for 12 volt continuous operation
defeats the sensor power switch and warm-up time and pow er s the sensor
connected to that analog channel at 12 volt s all the time.

The quick-connect input connectors ar e c olor c oded for eas y wiring. The ground
terminals are black, sensor power is red, and t he sensor input is white. Insert the
wire into the connector and push the locking lev er down. To release the wire, lift the
lever up until it locks it place.

Each channel can be configured separately usin g jumpers on the controller board.
Two jumpers are used for the input type and t wo are used to select the sensor
voltage. The jumper settings are the s am e for each channel. The diagram below
illustrates a 0-20mA (4-20mA) input with 12V DC swit c hed s ens or power. Disconnect
the battery when connecting sensors or c hanging the jumper settings.

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The jumper settings for the analog input configurations are as follows:

Input Type Jumper 1 Jumper 2
0-20mA 2a-2b 3a-4a
0-1mA 1a-2a 3a-3b
0-500uA 1a-2a 4a-4b
0-10VDC 1a-2a 4b-5b
0-5VDC 1a-2a 3a-4a

Sensor Power Jumper 3 Jumper 4
18V Switched 7a-8a 9a-9b
12V Switched 7a-7b 9a-9b
5V Switched 6a-7a 9a-9b
12V Continuous 7a-8a 8b-9b

Digital Inputs

Up to 3 digital inputs are available that can be c onfigured in any combination of
accumulators (rain gauges, flow sens or s ) or status inputs (doors swit ches, power
failure). These inputs can also be program m ed to initiate a transmission on any
change of state (event), a door opening or a pum p turning on for example. All input
configurations are factory programmable only.

The quick-connect input connectors ar e c olor c oded for eas y wir ing. Black terminals
are connected to ground, red terminals ar e c onnected to 12VDC continuously, and
the digital inputs are colored white. I ns er t t he wire int o the connector and push the
locking lever down. To release the wire, lift the lever up until it locks it place.

The digital inputs have 20Kohm pull-up resist or s to the +5volt internal power supply
of the circuit board. This input is intended t o be s witched to ground only, either by a
switch contact closure or by a switching transistor. Driving these inputs with a
positive voltage other than 5volts c an r es ult in excess current drain and improper
circuit operation.