Endress+Hauser Tankvision NXA820 User manual

BA340F/00/EN/12.09
71104766
Operating Instructions
Tankvision
Tank Scanner NXA820, Data Concentrator
NXA821, Host Link NXA822
Inventory Control

Table of Contents
2
Table of Contents
1 Safety Instructions . . . . . . . . . . . . . . . . 3
1.1 Designated use . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
1.2 Installation, commissioning, operation . . . . . . . . . . 3
1.3 Notes on safety conventions and symbols . . . . . . . . 4
2 Identification . . . . . . . . . . . . . . . . . . . . 5
2.1 Nameplate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
2.2 Product Structure . . . . . . . . . . . . . . . . . . . . . . . . . . 6
2.3 Supplied documentation . . . . . . . . . . . . . . . . . . . . . 9
2.4 Certificates and approvals . . . . . . . . . . . . . . . . . . . . 9
2.5 Registered trademarks . . . . . . . . . . . . . . . . . . . . . . 9
3 Installation . . . . . . . . . . . . . . . . . . . . . 10
3.1 Incoming acceptance, transport, storage . . . . . . . . 10
3.2 Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
3.3 Installation check . . . . . . . . . . . . . . . . . . . . . . . . . 11
4 Wiring. . . . . . . . . . . . . . . . . . . . . . . . . 12
4.1 Wiring examples . . . . . . . . . . . . . . . . . . . . . . . . . 12
4.2 Terminal assignment . . . . . . . . . . . . . . . . . . . . . . 12
4.3 Terminal assignment Field connection - Tank Scanner
NXA820 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
4.4 Terminal assignment host/printer connection -
Host Link NXA822 / Data Concentrator NXA821 . 18
5 Operation station settings. . . . . . . . . . 21
5.1 Deactivate proxy server usage . . . . . . . . . . . . . . . . 21
5.2 Java Runtime Environment (JRE) . . . . . . . . . . . . . 22
6 The Tankvision User Interface . . . . . . 23
7 Tankvision configuration . . . . . . . . . . 26
7.1 Loggin into the Tankvision system . . . . . . . . . . . . 26
7.2 Common settings - Tankvision system . . . . . . . . . 27
7.3 Exit the Tankvision system . . . . . . . . . . . . . . . . . . 41
8 Trouble shooting . . . . . . . . . . . . . . . . 42
8.1 Test network connection . . . . . . . . . . . . . . . . . . . 42
8.2 Resets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43

Safety Instructions
3
1SafetyInstructions
1.1 Designated use
Tankvision is a dedicated tank inventory management system.
Components:
•Tankvision Tank Scanner NXA820
scans parameters from tank gauges and performs tank calculations
•Tankvision Data Concentrator NXA821
summarizes data from various Tank Scanners NXA820
•Tankvision Host Link NXA822
provides data to host systems (such as PLC or DCS) via Modbus
The above mentioned components are operated via a standard web browser. It does not require any
proprietary software. Tankvision is based on a distributed architecture on a Local Area Network
(LAN). Due to its modular structure it can be adjusted to any application. It is ideally suited for small
tank farms with only a couple of tanks, but also for large refineries with hundreds of tanks.
1.2 Installation, commissioning, operation
The Tankvision system is fail-safe and constructed to the state-of-the-art. It meets the appropriate
standards and EC directives. However, if you use it improperly or other than for its designated use,
it may pose application-specific hazards, e.g. product overflow due to incorrect installation or
configuration. Installation, electrical connection, start-up, operation and maintenance of the devices
must therefore be carried out exclusively by trained specialists authorised by the system operator.
Technical personnel must have read and understood these operating instructions and must adhere
to them. You may only undertake modifications or repair work to the device when it is expressly
permitted by the operating instructions.

Safety Instructions
4
1.3 Notes on safety conventions and symbols
In order to highlight safety-relevant or alternative operating procedures in the manual, the following
conventions have been used, each indicated by a corresponding symbol in the margin.
Safety conventions
#Warning!
A warning highlights actions or procedures which, if not performed correctly, will lead to personal
injury, a safety hazard or destruction of the instrument
"Caution!
Caution highlights actions or procedures which, if not performed correctly, may lead to personal
injury or incorrect functioning of the instrument
!Note!
A note highlights actions or procedures which, if not performed correctly, may indirectly affect
operation or may lead to an instrument response which is not planned
Explosion protection
0Device certified for use in explosion hazardous area
If the device has this symbol embossed on its name plate it can be installed in an explosion hazardous
area
-Explosion hazardous area
Symbol used in drawings to indicate explosion hazardous areas. Devices located in and wiring
entering areas with the designation “explosion hazardous areas” must conform with the stated type
of protection.
.Safe area (non-explosion hazardous area)
Symbol used in drawings to indicate, if necessary, non-explosion hazardous areas. Devices located in
safe areas still require a certificate if their outputs run into explosion hazardous areas
Electrical symbols
%Direct voltage
A terminal to which or from which a direct current or voltage may be applied or supplied
&Alternating voltage
A terminal to which or from which an alternating (sine-wave) current or voltage may be applied or
supplied
)Grounded terminal
A grounded terminal, which as far as the operator is concerned, is already grounded by means of an
earth grounding system
*Protective grounding (earth) terminal
A terminal which must be connected to earth ground prior to making any other connection to the
equipment
+Equipotential connection (earth bonding)
A connection made to the plant grounding system which may be of type e.g. neutral star or
equipotential line according to national or company practice
Temperature resistance of the connection cables
States, that the connection cables must be resistant to a temperature of at least 85 °C (185°F).
t >85°C

Identification
5
2 Identification
2.1 Nameplate
L00-NXA82xxx-18-00-00-yy-001
1: Order code according to the product structure
2: Serial number
3: Supply voltage
4: Type of fieldbus communication (only for Tank Scanner NXA820)
5: Degree of protection
6: Admissible ambient temperature
7: MAC address of the System LAN port
8: MAC address of the Sync Link LAN port
9: Technical data of the Service LAN port
Made in Germany
D-79689 Maulburg
Tankvision
Order Code:
Ser.-No.:
250002393--
100 (Auto-MDIX)
MAC:
100 (Auto-MDIX)
MAC:
1
2
3
4
5
6
7
8
9

Identification
6
2.2 Product Structure
2.2.1 Tank Scanner NXA820
* in preparation
010 Approval
A Non-hazardous area
020 Field Communication; Input
1 Whessoematic 550, max. 15 instruments
4 Modbus EIA485 master, max. 15 instruments
8 Sakura V1 protocol, max. 10 instruments
Y Special version, to be specified
030 Power Supply
1 90-250 V AC 50/60Hz
2 10.5-32 V DC
9 Special version, to be specified
040 Inventory Calculations
1 Oil + gas
9 Special version, to be specified
050 Data Archive Memory Size
D 1GB; 15 parameter/min; 90 days
Y Special version, to be specified
060 Local Operation
1 status display
9 Special version, to be specified
070 Operation Language
A English
B German / English
C *Dutch / English
D *Italian / English
E *French / English
F *Spanish / English
G *Chinese / English
H *Russia / English
I Japanese / English
Y Special version, to be specified
080 Housing
1 DIN rail mounting PBT, IP20
9 Special version, to be specified
090 Redundancy
1w/o
9 Special version, to be specified
100 Custody Transfer Approval
0 not selected
1 NMI type approval
7 PTB type approval
9 Special version, to be specified
110 Additional Option
A Basic version
Y Special version, to be specified
NXA820 - complete product designation

Identification
7
2.2.2 Data Concentrator NXA821
* in preparation
010 Approval
A Non-Hazardous area
030 Power supply
1 90-250 V AC 50/60Hz
2 10.5-32 V DC
9 Special version, to be specified
050 Data Archive Memory Size
D 1GB; 15 parameter/min; 90 days
Y Special version, to be specified
060 Local Operation
1 status display
9 Special version, to be specified
070 Operation Language
A English
B German / English
C *Dutch / English
D *Italian / English
E *French / English
F *Spanish / English
G *Chinese / English
H *Russia / English
I Japanese / English
Y Special version, to be specified
080 Housing
1 DIN rail mounting PBT, IP20
9 Special version, to be specified
090 Redundancy
1w/o
9 Special version, to be specified
100 Custody Transfer Approval
0 not selected
1 NMI type approval
7 PTB type approval
9 Special version, to be specified
110 Additional Option
A Basic version
P Printer port, serial, W+M approved
Y Special version, to be specified
NXA821 - complete product designation

Identification
8
2.2.3 Host Link NXA822
* in preparation
010 Approval
A Non-hazardous area
020 Communication; Output
1 Modbus serial, TCP/IP, Entis + slave interface
9 Special version, to be specified
030 Power Supply
1 90-250 V AC 50/60Hz
2 10.5-32V DC
9 Special version, to be specified
060 Local Operation
1 status display
9 Special version, to be specified
070 Operating language
A English
B German / English
C *Dutch / English
D *Italian / English
E *French / English
F *Spanish / English
G *Chinese / English
H *Russia / English
I Japanese / English
Y Special version, to be specified
080 Housing
1 DIN rail mounting PBT, IP20
9 Special version, to be specified
090 Redundancy
1w/o
9 Special version, to be specified
100 Custody Transfer Approval
0 not selected
1 *NMi type approval
7 *PTB type approval
9 Special version, to be specified
110 Additional Option
A Basic version
Y Special version, to be specified
NXA822 - complete product designation

Identification
9
2.3 Supplied documentation
2.3.1 Operating instructions
2.4 Certificates and approvals
CE mark, declaration of conformity
The device is designed to meet state-of-the-art safety requirements, has been tested and left the
factory in a condition in which it is safe to operate. The device complies with the applicable
standards and regulations as listed in the EC declaration of conformity and thus complies with the
statutory requirements of the EG directives. Endress+Hauser confirms the successful testing of the
device by affixing to it the CE mark.
2.5 Registered trademarks
Microsoft®, Windows®and Internet Explorer®
Registered trademarks of the Microsoft Corporation
Modbus®
Registered trademark of the Modbus-IDA, Hopkinton, MA, USA
Java®
Registered trademark of Sun Microsystems, Inc.
Document number Instrument Type of Document
BA339F/00
• Tank Scanner NXA820
• Data Concentrator NXA821
• Host Link NXA822
Description of Instrument Functions
BA340F/00
• Tank Scanner NXA820
• Data Concentrator NXA821
• Host Link NXA822
Installation Instructions

Installation
10
3 Installation
3.1 Incoming acceptance, transport, storage
3.1.1 Incoming acceptance
Check the packing and contents for any signs of damage.
Check the shipment, make sure nothing is missing and that the scope of supply matches your order.
3.1.2 Delivery content
• Tankvision
• Ferrite for installation on the power supply cable
• Operating Instruction BA340F/00
3.1.3 Transport, storage
Pack the measuring instrument so that it is protected against impacts for storage and transport. The
original packing material provides the optimum protection for this.
Permissible storage temperature: 0 to +55 °C (32°F to 131°F).
3.2 Mounting
3.2.1 Dimensions
NXA82xxx-06-00-00-yy-002
3.2.2 Installation conditions
• The DIN-rail housing must be mounted outside hazardous areas in a cabinet.
• The housing is mounted on a DIN rail EN 60715 TH 35x7,5 or TH 37x15.
• Do not install the instrument in the vicinity of high-voltage lines, motor lines, contactors or
frequency converters. The installation regulations for high-voltage lines, motor lines, contactors
or frequency converters must be observed.
• To ensure easy mounting and opening of the housing, a distance of approx. 1 cm (0.39 in) should
be kept between the instruments.
43 (1.7”)
35 (1.4”)
104 (4.1”)
150 (5.9”)
140 (5.5”)
100 (3.9)
Gap ≥ 50 (2”)
Gap ≥ 50 (2”)

Installation
11
3.2.3 Mounting
L00-FMU90xxx-17-00-00-xx-001
A: Attaching the instrument to the rail B: Detaching the instrument from the rail
3.3 Installation check
After installing the device, carry out the following checks:
• Is the device damaged (visual inspection)?
• Does the device correspond to the measuring point specifications such as ambient temperature
etc?
• If available: Are the measuring point number and labelling correct?
• Is the instrument sufficiently protected against rainfall and direct sunlight?
• Is the instrument securely mounted to the DIN rail (visual inspection)?
a
b
EN 60715 TH 35x7,5
EN 60715 TH 35x15
AB
b
a

Wiring
12
4 Wiring
4.1 Wiring examples
L00-NXA82xxx-02-00-00-en-005
4.2 Terminal assignment
L00-NXA82xxx-04-00-00-yy-020
A: Power supply B: Fuse C: Status relay D: System LAN port E: Sync Link LAN port F: Service LAN port
G: Endress+Hauser CDI port H: Display port I: USB port J: Weights & Measures locking switch
NXA820 NXA820
NXA822
NXA820
Tank Scanner
NXA820
Tank Scanner
NXA822
Host Link
Switch
Browser
Modbus
NXA820
NXA821
Data Concentrator
Bediener 1
Bediener 2
SPS
Feldbus-Protokoll Feldbus-Protokoll
23
1
6
7
8
W&M
RESET
RESET
NXA Status
Relay
E
L+
L-
6
7
83
2
1
Fuse
POWER
10,5 ... 32V DC
2AT
A
B
C
D
E
F
G H I
J

Wiring
13
4.2.1 Power supply
Connector: Phoenix 7.62 GMSTB/GFKC
Overvoltage Protection
Power supply: 2 x HAW561
Surge arrester HAW651K
• for low voltage users 24/48V, single pole, requirement class C, basic component with plugged in
protection unit, defect display, 18 mm (0.71 in) housing width. Order code: 51003569
• for standard voltage users 115/230V, single pole, requirement class C, basic component with
plugged in protection unit, defect display, 18 mm (0.71 in) housing width. Order code: 51003570
L00-NXA820-04-00-en-001
!Note!
The signal input with the NXA820 can be protected by a suitable overvoltage protection,
additionally to the overvoltage protection which is integrated in the instrument.
Terminal Meaning for AC version (90-250 VAC)
NXA821 - *1*******
Meaning for DC version (10.5-32 VDC)
NXA821 - *2*******
1L L+
2N L-
3 Potential equalization Potential equalization
Fuse 400 mA T Fuse 2 A T
Tankvision
Power supply:
2x HAW561

Wiring
14
Wiring of DC Variants
To meet the emission class A1), it is mandatory to install the enclosed ferrite as close as possible to
the power supply connector of the device. If this is not possible an additional line filter can be
installed.
L00-NXA82xxx-04-00-00-xx-001
A: Terminal clamp B: Ferrite C: Fixation (e.g. cable straps)
The delivered ferrite must be installed as follows:
1. Put over the cable (prior installing the core cable ends)
2. The ferrite must be installed and secured against slipage next to the terminal clamp (e.g. with
2 cable straps)
4.2.2 Status Relay
Connector: Phoenix FKC 2,5HC/3-St-5,08
!Note!
The depicted switching state of the relay refers to the de-energized state.
4.2.3 LAN connection
1) DIN EN 55011: Industrial, scientific and medical (ISM) radio-frequenzy equipment - radio disturbance characteristics - limits and methods of measurements
23
1
6
7
8
W&M
W&M
RESET
RESET
RESET
NXA Status
Relay
NXA Status
Relay
E
L+
L-
6
7
8
3
2
1
Fuse
Fuse
POWER
10,5 ... 32V DC
2AT
2AT
10 11 12 13
10
10 11 12 13
MODBUS
MODBUS
A
B
C
Terminal Meaning Remarks
6 normally open contact • NXA operating normally:
terminals 7 & 8 are interconnected
• NXA powered off or fault status condition:
terminals 6 & 8 are interconnected
7 normally closed contact
8 switching contact
Socket Meaning Remarks
System LAN port Connects the instrument to the network.
Sync Link LAN port
(in preparation)
Used for connection to redundant unit.
If the primary unit fails, its task is taken over by the redundant unit.
Service LAN port Connects the instrument to a computer locally for service purpose.
Only this instrument can be configured. The Service LAN port does not
allow access to the network.

Wiring
15
4.2.4 Additional elements in the terminal compartment
4.3 Terminal assignment Field connection - Tank Scanner
NXA820
L00-NXA82xxx-04-00-00-xx-004
A: Power supply B: Fuse C: Status relay D: Fieldbus connection E: Ground F: System LAN Port G: Sync Link LAN port
H: Service LAN port I: Enderess+Hauser CDI port J: Display port K: USB port L: Weight & Measures locking switch
4.3.1 Field connection - Tankvision Tank Scanner
Symbol Meaning Remarks
Endress+Hauser CDI port Not used in the Tankvision instrument.
Display port For the connection of the local display in the housing cover.
Is connected on delivery.
USB port Reserved for future enhancements.
W&M Weights & Measures Switch • :W&M parameters are unlocked and can be changed.
• :W&M parameters are locked and cannot be changed.
2 3
1
6
7
8
W&M
RESET
RESET
NXA Status
Relay
E
L+
L-
6
7
83
2
1
Fuse
POWER
10,5 ... 32V DC
2AT
10 11 12 13
10 11 12 13
MODBUS
A
B
C
D
F
G
E
H
IJK
L
Terminal Whessoematic 5501)
NXA820 - *1*********
1) For details →ä17
Modbus EIA4852)
NXA820 - *4*********
2) For details →ä16
Sakura V13)
NXA820 - *8*********
3) For details →ä16
10 - Data signal (-) A Data signal (-) B Data signal (+)
11 + Data signal (+) B Data signal (+) A Data signal (-)
12 not connected C Signal Common not connected
13 not connected S Capacitive Shield S capacitive shield
)Ground Ground Ground

Wiring
16
4.3.2 Additional information on Modbus EIA485
Connection
As described in the “Modbus over serial line specification and implementation guide V1.02”
published by the Modbus-IDA organisation (www.modbus.org) and based upon the EIA/TIA-485-
A physical layer specification, Modbus two-wire serial requires the following four electrical
connections between each of the devices on the bus.:
Additional bus settings
• Bus biasing resistors (must be present at one point on the bus) (always enabled inside NXA820)
• Bus termination resistor (must be present at each end of the bus) (software selectable inside
NXA820)
Cable Specification
4.3.3 Additional information on Sakura V1
Connection
Terminal Signal Purpose Remarks
10 A Data signal (-)
These signals must be connected using a balanced twisted pair cable.
11 B Data signal (+)
12 C Signal Common Must interconnect all devices on the bus.
13 Shield EMC Protection Copper braided or combined foil and braided shielding.
Characteristic impedance 135 to 165 Ωat measuring frequency of 3 to 20 MHz
Cable capacitance ≤30 pF/m
Core cross-section ≥0.34 mm2(AWG 22) multi-strand cable is preferred
Cable type Single twisted pair + third conductor (for common)
or
Dual twisted pair (common uses second pair with wire joined together)
Cable resistance ≤110 Ω/km
Signal damping Max. 9 dB over the entire length of the cable cross-section
Shielding Copper braided shielding or combined foil and braided shielding
Terminal V1 Meaning Remarks
13 S Capacitive Shield
Connector: Phoenix FKIC 2,5/4-St-5,08
12 Not connected
11 A
10 B
)Ground Must be independently connected directly to a
primary grounding point using 4 mm2cable.

Wiring
17
V1 Definition
V1 fieldbus is a voltage mode digital communication using up to ±30 VDC, and requires the
following three electrical connections between each of the devices on the bus:
V1 Cable specification
4.3.4 Additional information on Whessoe WM550
The WM550 communication protocol works using a current loop principle.
"Caution!
Please take care that the signal and power cables always are separated to prevent noise and electrical
interference between them.
Connection
Please take into consideration that the principle of current loop connection works as follows:
The Tankvision (master) (-) signal point connects to slave 1 (+) signal point. Slave 1 (-) signal point
connects to slave 2 (+) signal point until (the last) slave N (-) signal point connects back to the
Tankvision (master) (+) signal point closing the current loop.
Cable specification
Please ensure to follow the following recommendations for field installation of the Tankvision with
the WM550 protocol variant
• Cable with twisted and non-shielded pairs
• Cable with at least 0,5 mm² (20 AWG) section
• Maximum total cable resistance: 250 Ω
• Cable with low capacitance
Signal Purpose Remarks
A Data signal (-)
These signals must be connected using a balanced twisted pair cable.
B Data signal (+)
Shield EMC protection Copper braided or combined foil and braided shielding
Cable capacitance ≤50 nF/m
Core cross-section ≥0.9 mm2(AWG 17) multi-strand cable is preferred
Cable type twisted pair
Cable resistance ≤30 Ω/km
Shielding Copper braided shielding or combined foil and braided shielding
Insulation ≥60 VDC
Terminal Signal Purpose Remarks
10 - Data Signal Current Loop (-)
11 + Data Signal Current Loop (+)
Cross section (mm² (AWG)) Resistance (Ω/km) Capacitance (nF/km)
Cable 1 0,5 (20) 39.2 60
Cable 2 0,75 (18) 24.6 65
Cable 3 1,3 (16) 14.2 75

Wiring
18
4.4 Terminal assignment host/printer connection -
Host Link NXA822 / Data Concentrator NXA821
This chapter is valid for Tankvision Host Link and Tankvision Data Concentrator with Printer Port
option.
L00-NXA82xxx-04-00-00-xx-005
A: Power supply B: Fuse C: Status relay D: System LAN port E: Sync Link LAN port F: Service LAN port
G: RS232 Host connection (Host Link or Printer Connection Data Concentrator H: RS485 Host connection I:
Endress+Hauser CDI port J: Display port K: USB port L: Weights & Measures locking switch
4.4.1 Host connection: Modbus Serial, EIA/TIA-232 (RS232)
The NXA822 Host Link is defined as a Data Terminal Equipment (DTE) device, and provides EIA/
TIA-232 (RS232) interface through a male DB9 connector whose pin out complies with the EIA/
TIA-574 standard:
2 3
1
6
7
8
W&M
W&M
RESET
RESET
RESET
RESET
NXA Status
Relay
NXA Status
Relay
E
L+
L+
L-
6
7
83
2
1
Fuse
Fuse
POWER
POWER
10,5 ... 32V DC
10,5 ... 32V DC
2AT
2AT
DTR
DSR CTS
RTS
RS485
RS232
C
B
A
18
17
16
A
B
C
D E
F
G
H
IJK
L
Pin RS232 Name Remarks
1 CD Carrier Detect Signal from connected device
2 RxD Receive Data Signal from connected device
3 TxD Transmit Data Signal to connected device
4 DTR Data Terminal Ready Signal to connected device
5 G Signal Ground Common connection
6 DSR Data Set Ready Signal from connected device
7 RTS Request To Send Signal to connected device
8 CTS Clear To Send Signal from connected device
9 RI Ring Indicator Signal from connected device
Case Shield Shield

Wiring
19
Definition
EIA/TIA-232 (RS232) is a voltage mode digital communication using up to ±12 VDC, and requires
a variety of signals depending on the operating mode (software selectable):
RS-232 Cable Specification
Signal Basic RS232 Fully RS232 with
Hardware Handshaking
(in preparation)
Remarks
Shield Required Required Copper braided or combined foil and braided shielding
G Required Required
RxD Required Required
TxD Required Required
RTS Required Null Modem connection, these two pins can be linked
together
CTS Required
DTR Required
Null Modem connection, these three pins can be linked
together
DSR Required
CD Required
RI Optional Not required
Cable capacitance ≤50 pF/m
Core cross-section ≥0.34 mm2(AWG 22) multi-strand cable is preferred
Cable type Single cable or twisted pair
Cable resistance ≤110 Ω/km
Signal damping Max. 9 dB over the entire length of the cable cross-section
Shielding Copper braided shielding or combined foil and braided shielding

Wiring
20
4.4.2 Host connection: Modbus Serial, EIA/TIA-485 (RS485)
Two-Wire Modbus Definition
As described in the “Modbus over serial line specification and implementation guide V1.02”
published by the Modbus-IDA organisation (www.modbus.org) and based upon the EIA/TIA-485-
A physical layer specification.
Modbus two-wire serial requires the following four electrical connections between each of the
devices on the bus:
Additional EIA/TIA-485 bus settings
• Bus biasing resistors (must be present a one point on the bus) (software selectable inside NXA822)
• Bus termination resistor (must be present a each end of the bus) (software selectable inside
NXA822)
Cable Specification
4.4.3 Host connection: Modbus TCP/IP (via System LAN port)
L00-NXA82xxx-04-00-00-yy-024
Terminal EIA/TIA-485
Modbus
Meaning Remarks
18 C Signal Common
Connector: Phoenix FKC 2,5HC/3-St-5,0817 B + signal
16 A - signal
Signal Purpose Remarks
A Data signal (-)
These signals must be connected using a balanced twisted pair cable.
B Data signal (+)
C Signal Common Must interconnect all devices on the bus.
Shield EMC Protection Copper braided or combined foil and braided shielding
Characteristic impedance 135 to 165 Ωat measuring frequency of 3 to 20 MHz
Cable capacitance ≤30 pF/m
Core cross-section ≥0.34 mm2(AWG 22) multi-strand cable is preferred
Cable type Single twisted pair + third conductor (for common)
or
Dual twisted pair (common uses second pair with wire joined together)
Cable resistance ≤110 Ω/km
Signal damping Max. 9 dB over the entire length of the cable cross-section
Shielding Copper braided shielding or combined foil and braided shielding
Host
TCP/IPClient
Modbus
Master
NXA822
TCP/IPServer
Modbus
Slave
NXA820
Tank
Data 1.15
TCP/IPConnection
Port: #500
Modbus Request
Modbus Reply