Geokon 8800 User manual

©2020, GEOKON. All rights reserved.
Document Revision: V| Release date: 3/26/20
Model 8800 Series
GeoNet Wireless
Data Acquisition Network
Instruction Manual

WARRANTY STATEMENT
GEOKON warrants its products to be free of defects in materials and workmanship,
under normal use and service for a period of 13 months from date of purchase. If the
unit should malfunction, it must be returned to the factory for evaluation, freight
prepaid. Upon examination by GEOKON, if the unit is found to be defective, it will be
repaired or replaced at no charge. However, the WARRANTY IS VOID if the unit shows
evidence of having been tampered with or shows evidence of being damaged as a
result of excessive corrosion or current, heat, moisture or vibration, improper specifi-
cation, misapplication, misuse or other operating conditions outside of GEOKON's
control. Components that wear or are damaged by misuse are not warranted. This
includes fuses and batteries.
GEOKON manufactures scientific instruments whose misuse is potentially dangerous.
The instruments are intended to be installed and used only by qualified personnel.
There are no warranties except as stated herein. There are no other warranties,
expressed or implied, including but not limited to the implied warranties of merchant-
ability and of fitness for a particular purpose. GEOKON is not responsible for any
damages or losses caused to other equipment, whether direct, indirect, incidental,
special or consequential which the purchaser may experience as a result of the instal-
lation or use of the product. The buyer's sole remedy for any breach of this agreement
by GEOKON or any breach of any warranty by GEOKON shall not exceed the purchase
price paid by the purchaser to GEOKON for the unit or units, or equipment directly
affected by such breach. Under no circumstances will GEOKON reimburse the
claimant for loss incurred in removing and/or reinstalling equipment.
Every precaution for accuracy has been taken in the preparation of manuals and/or
software, however, GEOKON neither assumes responsibility for any omissions or
errors that may appear nor assumes liability for any damages or losses that result
from the use of the products in accordance with the information contained in the
manual or software.
No part of this instruction manual may be reproduced, by any means, without the written consent of GEOKON. The
information contained herein is believed to be accurate and reliable. However, GEOKON assumes no responsibility
for errors, omissions or misinterpretation. The information herein is subject to change without notification.
The GEOKON® wordmark and logo are registered trademarks with the United States Patent and Trademark Office.

I
TABLE OF CONTENTS
1. INTRODUCTION............................................................................................................................................1
1.1 MODEL LIST .............................................................................................................................................1
1.2 MODEL IDENTIFICATION .............................................................................................................2
1.3 SUPERVISOR ...........................................................................................................................................2
1.3.1 RS-232 (8800-XX-SUP-232) ...........................................................................................................2
1.3.2 USB (8800-XX-SUP-USB)................................................................................................................3
1.4 SINGLE CHANNEL NODE..............................................................................................................3
1.4.1 10-PIN CONNECTOR (8800-XX-01C-10P) ................................................................................3
1.4.2 GLAND SEAL (8800-XX-01C-CBL) ..............................................................................................4
1.5 ADDRESSABLE SENSOR NODES..........................................................................................4
1.5.1 GLAND SEAL (8800-XX-ADR-CBL) .............................................................................................4
1.6 MULTI-CHANNEL NODES ............................................................................................................5
1.6.1 FOUR CHANNEL GLAND SEAL (8800-XX-04C-CBL)...........................................................5
1.6.2 EIGHT CHANNEL GLAND SEAL (8800-XX-08C-CBL)..........................................................5
1.7 COMPATIBILITY WITH LEGACY GEONET PRODUCTS ......................................6
1.8 ACCESSORIES ........................................................................................................................................6
1.9 NETWORKS...............................................................................................................................................6
2. ADDRESSABLE AND MULTI-SENSOR NODES .......................................................9
2.1 GEONET ADDRESSABLE SENSOR NODES...................................................................9
2.2 GEONET MULTI-CHANNEL NODES .....................................................................................9
2.3 INSTALLATION .................................................................................................................................. 11
2.4 LIGHTNING PROTECTION........................................................................................................ 11
2.5 CONNECTING TO THE NETWORK.................................................................................... 11
3. NETWORK INSTALLATION......................................................................................................... 12
3.1 CONFIGURE THE CHANNEL................................................................................................... 12
3.2 MOUNT THE DEVICE .................................................................................................................... 13
3.3 INSTALL THE ANTENNA........................................................................................................... 13
3.4 INSTALL THE BATTERIES........................................................................................................ 13
3.5 CONNECT THE SENSOR(S)..................................................................................................... 14
3.5.1 MAKING A CABLE GLAND CONNECTION .......................................................................... 14
3.5.2 MAKING A 10-PIN CABLE CONNECTION ........................................................................... 15
3.6 SEAL THE ENCLOSURE .............................................................................................................. 15
3.7 DEPLOYMENT MODE ................................................................................................................... 15

II
3.7.1 ADDING NODES ............................................................................................................................. 15
3.8 STATUS BUTTON FUNCTIONALITY ................................................................................ 16
4. MAINTENANCE ......................................................................................................................................... 18
4.1 PREVENTING WATER FROM ENTERING THE ENCLOSURES .................. 18
4.2 BATTERY LIFE ..................................................................................................................................... 18
4.3 REPLACING BATTERIES ............................................................................................................ 18
5. MODEL 8800-2-4B ADD-ON MODULE........................................................................... 20
5.1 INTRODUCTION................................................................................................................................. 20
5.2 INSTALLATION................................................................................................................................... 20
5.3 IP ADDRESS CONFIGURATION........................................................................................... 20
6. SENSEMETRICS MANAGEMENT PLATFORM ..................................................... 23
6.1 CHANNEL CONFIGURATION.................................................................................................. 23
6.2 STATUS BUTTON............................................................................................................................. 23
APPENDIX A. SPECIFICATIONS................................................................................................... 25
A.1 SUPERVISOR SPECIFICATIONS......................................................................................... 25
A.2 NODE SPECIFICATIONS ............................................................................................................ 25
A.3 NETWORK SPECIFICATIONS................................................................................................ 25
APPENDIX B. CONNECTOR PINOUTS .................................................................................. 26
B.1 TRANSDUCER CABLE CONNECTIONS......................................................................... 26
B.1.1 CABLE GLAND (8800-XX-XXX-CBL) ...................................................................................... 26
B.1.2 10-PIN BULKHEAD (8800-XX-XXX-10P)............................................................................... 26
B.2 COMMUNICATION CONNECTIONS ................................................................................ 26
B.2.1 RS-232 (8800-XX-SUP-232) ....................................................................................................... 26
B.2.2 USB (8800-XX-SUP-USB)............................................................................................................ 26
APPENDIX C. THERMISTOR TEMPERATURE DERIVATION ....................... 27
C.1 3KΩ THERMISTOR RESISTANCE...................................................................................... 27
C.2 10KΩ THERMISTOR RESISTANCE .................................................................................. 28
APPENDIX D. TROUBLESHOOTING......................................................................................... 29
APPENDIX E. FIRMWARE UPDATE.......................................................................................... 31
E.1 PROCEDURE.......................................................................................................................................... 31
E.2 TROUBLESHOOTING ..................................................................................................................... 35
E.3 CHANGE SUMMARY FOR FIRMWARE VERSIONS............................................ 35
APPENDIX F. DEVICE MOUNTING CONSIDERATIONS.................................... 36

III
FIGURES
FIGURE 1: NETWORK SUPERVISOR (-SUP-232) .............................................................2
FIGURE 2: NETWORK SUPERVISOR (-SUP-USB) ............................................................3
FIGURE 3: SINGLE CHANNEL NODE (-01C-10P) ............................................................3
FIGURE 4: SINGLE CHANNEL NODE (-01C-CBL) ............................................................4
FIGURE 5: ADDRESSABLE NODE (-ADR) ........................................................................4
FIGURE 6: FOUR CHANNEL NODE (-04C) .......................................................................5
FIGURE 7: EIGHT CHANNEL NODE (-08C) ......................................................................5
FIGURE 8: CLUSTER TREE NETWORK TOPOLOGY .........................................................7
FIGURE 9: WORKING AROUND OBSTRUCTIONS ...........................................................7
FIGURE 10: FRESNEL ZONE .............................................................................................8
FIGURE 11: NODE CONNECTED TO 6150F ADDRESSABLE STRING ............................9
FIGURE 12: FOUR CHANNEL NODE CONNECTORS ....................................................10
FIGURE 13: FOUR CHANNEL NODE INTERIOR ............................................................10
FIGURE 14: EIGHT CHANNEL NODE CONNECTORS ...................................................10
FIGURE 15: EIGHT CHANNEL NODE INTERIOR ...........................................................11
FIGURE 16: CHANNEL SELECT SWITCHES ...................................................................12
FIGURE 17: RESET BUTTON ...........................................................................................13
FIGURE 18: BATTERY SELECT SWITCH .........................................................................13
FIGURE 19: BATTERY DETAIL .........................................................................................14
FIGURE 20: TERMINAL CONNECTIONS ........................................................................15
FIGURE 21: INSTALLATION ORDER ...............................................................................16
FIGURE 22: NPORT CONFIGURATION ...........................................................................21
FIGURE 23: UPDATE FIELDS ..........................................................................................21
FIGURE 24: IP ADDRESS WITH :4001 SUFFIX ..............................................................22
FIGURE 25: SAMPLE NETWORK CONFIGURATION .....................................................23
FIGURE 26: BATTERY SELECTOR SWITCH IN OFF POSITION .....................................31
FIGURE 27: CABLE CONNECTION .................................................................................31
FIGURE 28: RS-232 CONNECTOR DETAIL .....................................................................32
FIGURE 29: UPDATE CABLE DETAIL .............................................................................32
FIGURE 30: CHANNEL SELECTOR SWITCH ..................................................................32
FIGURE 31: RUN GEONETUPDATEUTILITY.EXE ............................................................33
FIGURE 32: CHOSE EXTRACT ALL .................................................................................33
FIGURE 33: SELECT DESTINATION, THEN CLICK EXTRACT ........................................33
FIGURE 34: OPEN THE GEONET UPDATE UTILITY .......................................................33
FIGURE 35: CLICK SELECT FILE .....................................................................................34
FIGURE 36: DOUBLE-CLICK ON FIRMWARE TEXT FILE ..............................................34
FIGURE 37: SELECT COM PORT .....................................................................................34
FIGURE 38: UPDATE PROGRESS ...................................................................................34

IV
FIGURE 39: INSTALLING NEAR A LARGE OBJECT .......................................................36
FIGURE 40: INSTALLING CLOSE TO BUILDINGS OR FENCES/WALLS .......................36
FIGURE 41: MOUNTING ONTO A METAL PLATE / INSIDE AN ENCLOSURE .............37

V
TABLES
TABLE 1: GEONET 8800 SERIES MODEL LIST................................................................ 1
TABLE 2: GEONET MODEL IDENTIFICATION .................................................................. 2
TABLE 3: LEGACY COMPATIBILITY CHART...................................................................... 6
TABLE 4: MULTI-CHANNEL NODE SENSOR/LOAD LIMITS .......................................... 9
TABLE 5: NODE WIRING.................................................................................................. 15
TABLE 6: LED INDICATOR MEANING ............................................................................ 16
TABLE 7: BATTERY LIFE ESTIMATES.............................................................................. 18
TABLE 8: CHANNEL SETTING FOR SENSEMETRICS COMPATIBILITY MODE .......... 23
TABLE 9: SUPERVISOR SPECIFICATIONS...................................................................... 25
TABLE 10: NODE SPECIFICATIONS................................................................................ 25
TABLE 11: NETWORK SPECIFICATIONS........................................................................ 25
TABLE 12: TRANSDUCER CABLE CONNECTIONS (GLAND SEAL)............................. 26
TABLE 13: TRANSDUCER CABLE CONNECTIONS (10-PIN BULKHEAD)................... 26
TABLE 14: COMMUNICATION CONNECTIONS (RS-232)............................................. 26
TABLE 15: COMMUNICATIONS CONNECTIONS (USB) ............................................... 26
TABLE 16: CHANNEL SELECTION .................................................................................. 26
TABLE 17: 3KΩ THERMISTOR RESISTANCE ................................................................. 27
TABLE 18: 10KΩ THERMISTOR RESISTANCE ............................................................... 28
TABLE 19: CHANGE SUMMARY ..................................................................................... 35

VI
EQUATIONS
EQUATION 1: 3KΩ THERMISTOR RESISTANCE .............................................................27
EQUATION 2: 10KΩ THERMISTOR RESISTANCE ...........................................................28

MODEL 8800 SERIES GEONET WIRELESS DATA ACQUISITION NETWORK | INTRODUCTION | 1
1. INTRODUCTION
GeoNet is a low-power wireless data acquisition network, designed to efficiently
collect data from many points. GeoNet is especially helpful in geographically-
complex locations where a wired infrastructure would be expensive or even
impossible. The system consists of a network supervisor unit, single- and/or
multi-channel node units, and Agent software. Nodes collect battery and
temperature data, and will read either GEOKON's vibrating wire gauges or
GEOKON's addressable sensors, depending on its configuration For information
regarding the installation and use of Agent software, please see the appropriate
product manual.
FEATURES:
■Supercapacitor eliminates data blackout during battery replacement
■Modular, configurable design
■Aluminum enclosure for enhanced ruggedness and weatherproofing
■900 MHz radio band
■Up to 12 networks per area (using unique channels)
■Up to 2 years of data storage
■USB connector for firmware updates, troubleshooting, more.
■Operates with alkaline or lithium batteries.
1.1 MODEL LIST
The list of 8800 series models is as follows:
TABLE 1: GeoNet 8800 Series Model List
CAUTION! To satisfy FCC RF exposure requirements for mobile transmitting devices, a separation distance
of 20 cm or more should be maintained between the antenna of this device and persons during device
operation. To ensure compliance, operations at closer than this distance is not recommended. The antenna
used for this transmitter must not be co-located in conjunction with any other antenna or transmitter.
8800-NA-SUP-232 1: RS-232 GeoNet Supervisor, North America
8800‑NA‑SUP‑USB USB GeoNet Supervisor, North America
8800-NA-01C-CBL Single Channel VW GeoNet Node, Cable Gland, North America
8800-NA-01C-10P Single Channel VW GeoNet Node, 10‑Pin Bulkhead, North America
8800-NA-ADR-CBL Addressable GeoNet Node, Cable Gland, North America
8800-NA-04C-CBL Four Channel VW GeoNet Node, Cable Gland, North America
8800-NA-08C-CBL Eight Channel VW GeoNet Node, Cable Gland, North America
8800-BZ-SUP-232 RS-232 GeoNet Supervisor, Brazil
8800‑BZ‑SUP‑USB USB GeoNet Supervisor, Brazil
8800-BZ-01C-CBL Single Channel VW GeoNet Node, Cable Gland, Brazil
8800-BZ-01C-10P Single Channel VW GeoNet Node, 10‑Pin Bulkhead, Brazil
8800-BZ-ADR-CBL Addressable GeoNet Node, Cable Gland, Brazil
8800-BZ-04C-CBL Four Channel VW GeoNet Node, Cable Gland, Brazil
8800-BZ-08C-CBL Eight Channel VW GeoNet Node, Cable Gland, Brazil
8800-AU-SUP-232 RS-232 GeoNet Supervisor, Australia
8800‑AU‑SUP‑USB USB GeoNet Supervisor, Australia
8800-AU-01C-CBL Single Channel VW GeoNet Node, Cable Gland, Australia
8800-AU-01C-10P Single Channel VW GeoNet Node, 10‑Pin Bulkhead, Australia
8800-AU-ADR-CBL Addressable GeoNet Node, Cable Gland, Australia
8800-AU-04C-CBL Four Channel VW GeoNet Node, Cable Gland, Australia
8800-AU-08C-CBL Eight Channel VW GeoNet Node, Cable Gland, Australia

2| INTRODUCTION | GEOKON
1.2 MODEL IDENTIFICATION
The 8800 series model numbers are composed codes that together indicate the
following information about each unit:
TABLE 2: GeoNet Model Identification
1.3 SUPERVISOR
Supervisor model types are distinguished by their physical connection to a PC.
The network supervisor unit controls the network and collects all data from the
nodes. The supervisor reads battery and temperature data, but it does not
possess sensor-reading functionality. Data stored by the supervisor may be
collected using Agent software or a Modbus client.
1.3.1 RS-232 (8800-XX-SUP-232)
Connects to a PC running the Agent program or other Modbus RTU master via
an RS-232 cable.
1:
FIGURE 1: Network Supervisor with RS-232 Connector (8800-XX-SUP-232)
Series Region 2: Model Type Supervisor PC Connection Node Sensor Connection
8800 NA: North America SUP: Supervisor 232:RS-232 Com CBL:Cable Gland
8800 BZ: Brazil 01C: 1 Channel Node USB:USB Com 10P:10 Pin
8800 AU: Australia 04C: 4 Channel Node
08C: 8 Channel Node
ADR: Addressable Node
Example: 8800-NA-01C-CBL

MODEL 8800 SERIES GEONET WIRELESS DATA ACQUISITION NETWORK | INTRODUCTION | 3
1.3.2 USB (8800-XX-SUP-USB)
Connects to a PC running the Agent program or other Modbus RTU master via a
USB cable.
2:
FIGURE 2: Network Supervisor with USB Connector (8800-XX-SUP-USB)
1.4 SINGLE CHANNEL NODE
A single channel node will read one GEOKON vibrating wire sensor. Nodes are
distinguished by their sensor connection options.
1.4.1 10-PIN CONNECTOR (8800-XX-01C-10P)
For use with sensor cables with 10-pin cable connectors.
3:
FIGURE 3: Single Channel Node with 10-Pin Connector (8800-XX-01C-10P)

4| INTRODUCTION | GEOKON
1.4.2 GLAND SEAL (8800-XX-01C-CBL)
For use with sensor cables with stripped and tinned ends. The sensor cable
passes through an external cable gland and is wired into the terminal block.
4:
FIGURE 4: Single Channel Node with Cable Gland Connector (880-XX-01C-CBL)
1.5 ADDRESSABLE SENSOR NODES
Addressable sensor nodes will read any GEOKON RS-485 addressable sensor,
such as the 6150F Addressable MEMS string. Model types are distinguished by
their sensor connection options.
Addressable sensor nodes function in the same manner as other nodes.
Each addressable node can read up to the following limits on the RS-485 bus:
■16 addressable MEMS sensors
■24 addressable VW sensors
■80 addressable temperature sensors
1.5.1 GLAND SEAL (8800-XX-ADR-CBL)
For use with sensor cables with stripped and tinned ends. The sensor cable
passes through an external cable gland and is wired into the terminal block.
5:
FIGURE 5: Addressable Node (8800-XX-ADR-CBL)

MODEL 8800 SERIES GEONET WIRELESS DATA ACQUISITION NETWORK | INTRODUCTION | 5
1.6 MULTI-CHANNEL NODES
Multi-channel node models are distinguished by their sensor connection options.
1.6.1 FOUR CHANNEL GLAND SEAL (8800-XX-04C-CBL)
For use with sensor cables that have stripped and tinned ends. The sensor
cables pass through external cable glands and are wired into the terminal block.
A four channel node will read up to four GEOKON vibrating wire sensors, one
3‑gauge load cell, or one 4-gauge load cell.
6:
FIGURE 6: Four Channel Node (8800-XX-04C-CBL)
1.6.2 EIGHT CHANNEL GLAND SEAL (8800-XX-08C-CBL)
For use with sensor cables that have stripped and tinned ends. The sensor
cables pass through external cable glands and are wired into the terminal block.
An eight channel node will read up to eight GEOKON vibrating wire sensors, up
to two 3-gauge load cells, up to two 4-gauge load cells, a combination of one 3-
gauge and one 4-gauge load cell, or one 6-gauge load cell.
7:
FIGURE 7: Eight Channel Node (8800-XX-08C-CBL)

6| INTRODUCTION | GEOKON
1.7 COMPATIBILITY WITH LEGACY GEONET PRODUCTS
8800-XX-XXX-XXX models are compatible with the following legacy GeoNet
products:
TABLE 3: Legacy Compatibility Chart
1.8 ACCESSORIES
Supervisors and nodes can be shipped with the following accessories:
■One omni-directional antenna (2.1 dBi). For other antenna options, please
contact GEOKON technical support.
■Two D cell alkaline batteries
■Four desiccant packs
Supervisors can be shipped with the following additional accessories:
■Set of two screwdrivers, one Phillips head and one flat-head
■One firmware upgrade cable
■One RS-232/USB cable (depending on the model purchased)
1.9 NETWORKS
GeoNet uses network technology that is self-configuring and self-healing. If all
nodes are in range of the supervisor, then data from the nodes is sent directly
from the nodes to the supervisor (a star topology).
Legacy Part Number3: New Part Number
8800-4-1A 8800-NA-SUP-232
RS-232 GeoNet Supervisor, North America
8800-4-2A 8800-NA-SUP-USB
USB GeoNet Supervisor, North America
8800-3-1A 8800-NA-01C-CBL
Single Channel VW GeoNet Node, Cable Gland, North America
8800-3-2A 8800-NA-01C-10P
Single Channel VW GeoNet Node, 10‑PinBulkhead,NorthAmerica
8800-6-1A 8800-NA-ADR-CBL
Addressable GeoNet Node, Cable Gland, North America
8800-4-1B 8800-BZ-SUP-232
RS-232 GeoNet Supervisor, Brazil
8800-4-2B 8800-BZ-SUP-USB
USB GeoNet Supervisor, Brazil
8800-3-1B 8800-BZ-01C-CBL
Single Channel VW GeoNet Node, Cable Gland, Brazil
8800-3-2B 8800-BZ-01C-10P
Single Channel VW GeoNet Node, 10‑Pin Bulkhead, Brazil
8800-6-1B 8800-BZ-ADR-CBL
Addressable GeoNet Node, Cable Gland, Brazil
8800-4-1C 8800-AU-SUP-232
RS-232 GeoNet Supervisor, Australia
8800-4-2C 8800-AU-SUP-USB
USB GeoNet Supervisor, Australia
8800-3-1C 8800-AU-01C-CBL
Single Channel VW GeoNet Node, Cable Gland, Australia
8800-3-2C 8800-AU-01C-10P
Single Channel VW GeoNet Node, 10‑Pin Bulkhead, Australia
8800-6-1C 8800-AU-ADR-CBL
Addressable GeoNet Node, Cable Gland, Australia

MODEL 8800 SERIES GEONET WIRELESS DATA ACQUISITION NETWORK | INTRODUCTION | 7
If direct communication is not possible for some nodes, then other nodes will
automatically relay their data to the supervisor. This effectively creates a cluster
tree topology. The figure below illustrates this concept.
8:
FIGURE 8: Cluster Tree Network Topology
Each transmission from node to supervisor or node to node is considered one
“hop”. Examples of hops are shown in figures above and below. Up to four hops
can be made between a node and the supervisor. With the ability to hop comes
the ability for the supervisor to communicate with nodes that have not
established direct radio communication. The figure below shows how GeoNet
devices can operate around buildings or other barriers using hops.
9:
FIGURE 9: Working Around Obstructions
When using GeoNet, it is important to understand the effect that obstructions
have on radio signals. Obstructions between two antennas can cause reflections
of the transmitted signal. When these reflections arrive at the receiving antenna,
they may be in or out of phase with the signal that took a straight-line path. This
S = Supervisor
N = Node (1, 4, 8, ADR)
= Data Path
Cell
Ethernet
USB/RS-232
1 Hop
1 Hop
1 Hop
Obstruction
1 Hop
1 Hop

8| INTRODUCTION | GEOKON
reflected signal may act as constructive or destructive interference with the
received signal. For optimum performance, GEOKON recommends creating as
much vertical space as possible between the straight-line path and obstacles,
including the ground.
The Fresnel zone must be at least 60% obstruction-free to ensure optimal
wireless communication.
The figure below illustrates the Fresnel zone.
10:
FIGURE 10: Fresnel Zone
If communication cannot be established when GeoNet is deployed to a site, it
may be necessary to elevate the devices or their antennas, or to move them to a
location where a radio link can be established. This may require extending the
readout cable of the attached sensors, or connecting an antenna cable
extension.
Fresnel Zone
By the ground
By road traffic
Radio Paths
By an obstacle
Building BuildingTree

MODEL 8800 SERIES GEONET WIRELESS DATA ACQUISITION NETWORK | ADDRESSABLE AND MULTI-SENSOR NODES | 9
2. ADDRESSABLE AND MULTI-SENSOR NODES
2.1 GEONET ADDRESSABLE SENSOR NODES
The GeoNet 8800-XX-ADR-CBL addressable sensor node enables your network
to communicate with addressable sensors, such as 6150F Addressable MEMS
strings. See the figure below.
11:
FIGURE 11: Addressable Sensor Node connected to 6150F Addressable MEMS string
Addressable sensor nodes function in the same manner as other nodes. Install
these using the instructions in Section 3.
2.2 GEONET MULTI-CHANNEL NODES
The GeoNet Multi-Channel Node (MCN) increases the number of sensors a node
can read, as indicated in the following table.
TABLE 4: Multi-Channel Node Sensor/Load Limits
Channel switching is controlled by the node and is accomplished by solid-state
(non-mechanical) circuitry.
Each MCN uses as much data as four or eight single nodes, depending on the
node model. The MCN is protected from environmental contaminants by a
rugged IP66 die cast aluminum enclosure. An earth ground terminal is provided
on the exterior of the enclosure to protect against lightning and other large,
transient voltages.
MCNs can ship with the following accessories:
■One omni-directional antenna (2.1 dBi). For other antenna options, please
contact GEOKON technical support.
■Two D cell alkaline batteries
■Four desiccant packs
Model 4: Maximum Number of Sensors Maximum Number of Load Cells
8800‑XX‑04C‑CBL Four One
8800‑XX‑08C‑CBL Eight Two

10 | ADDRESSABLE AND MULTI-SENSOR NODES | GEOKON
12:
FIGURE 12: Four Channel Node Connectors (8800-XX-04C-CBL)
FIGURE 13: Four Channel Node Interior (8800-XX-04C-CBL)
14:
FIGURE 14: Eight Channel Node Connectors (8800-XX-08C-CBL)
13: