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G-Tek Corporation Private Limited 

13 

 

5.1.1.2

 

Sensor Wiring 

To  ensure  maximum  LmNet  performance,  proper  wiring  installation  practices  must  be  followed. 
Failure to do so can result in a range of problems, from loss of configuration to component failure, 
caused by transmitted or radiated electrical noise. Proper consideration must be given to local noise 
sources and appropriate suppression steps taken to minimize any potential problems. 

Among the most common sources of noise are: Relays, SCRs, valve solenoids, electric motors, power 
line disturbance, wire-to-wire coupling, electrostatic discharge (ESD) and radio-frequency interference 
(RFI). 

1.

 

To achieve the best results, the following notes should be considered: 
Low  level  signal  wiring  such  as  that  associated  with  thermocouples,  RTDs  and  current  loops 
should always be kept separate from power and control output wiring. 

 

2.

 

Signal input wiring should be twisted pairs/triplets etc. and the conductors should be stranded 
rather than solid in construction. All signal wiring should use ground-shielded wires or be routed 
through grounded conduit. This minimizes the effects of RFI and ESD. 

 

3.

 

Special  care  should  be  taken  when  wiring  to  relay  or  solenoid  coils,  as  large  transients  are 
produced  when  coils  (or  any  other  inductive  devices)  are  switched.  This  problem  can  be 
eliminated  using  suitable  suppression  devices  across  the  coil.  Coil  transients  can  also  be 
transmitted through the  air, so the recorder itself should be mounted as far as possible from 
power control devices and/or wiring. 

 

4.

 

When  line  power  is  poorly  regulated  and  /  or  subject  to  voltage  surges  or  transients, 
consideration should be given to the use of a line conditioning/transient suppressing line power 
regulator. Process control motors, valves,  relays,  and heaters should not be connected to the 
same power lines that are used for instrumentation. 

 

5.

 

The connection of the LmNet to a proper safety earth ground is essential. Such a connection not 
only reduces the possibility of electric shock, but also provides the required return for the LmNet 
line power filters. 

 

6.

 

All local electrical codes of practice must be followed when installing any instrumentation. For 
sensor wiring, all the sensor connectors are at the back side of the LmNet as shown in figure 9. 

 
 
 
 

Содержание LmNet - PRO 614-00

Страница 1: ......

Страница 2: ...0 5 1 1 Wiring Diagram for LmNet 12 Operation 21 Configuration 23 7 1 Authentication Password 23 7 2 Configurable Item 24 7 3 Functions 26 7 3 1 System Setup 26 7 3 2 Display Setting 28 7 3 3 RTC 30 7...

Страница 3: ...to communicate recorder using TCP IP 46 9 1 3 How to connect the sensor to be used with the LmNet 46 9 1 4 Can we connect more than 1 sensor at a time with the LmNet 47 9 1 5 What is procedure if user...

Страница 4: ...Transmitter and Internal Power Supply 19 Figure 17 Relay 20 Figure 18 Ethernet Wiring with LmNet 20 Figure 19 key function 21 Figure 20 Password entry Procedure 23 Figure 21 Main menu display 25 Figur...

Страница 5: ...ure 51 Network Configuration 44 Figure 52 Network Information 45 Figure 53 Power on indication on LmNet 46 Figure 54 15 VDC 1 2 Amp Adaptor 48 Figure 55 Ethernet RJ45 Cable 48 LIST OF TABLES Table 1 M...

Страница 6: ...libration This section describes the calibration procedure for the LmNet Section 6 Troubleshooting Guide This section describes about the most frequently asked questions and their solutions about LmNe...

Страница 7: ...ly package specially designed to give adequate protection during transit If the outer box shows sign of damage it should be opened immediately and the LmNet be examined If there is evidence of damage...

Страница 8: ...G Tek Corporation Private Limited 7 Input Channels Ethernet Port Re Transmitter Output Relay Main supply connector Figure 2 Bottom View of LmNet...

Страница 9: ...For the installation just connect the LmNet with 15V 30V DC Input adaptor as shown in figure below Connect LmNet with LAN cable to connect it with PC for communication using TCP IP Figure 3 LmNet Figu...

Страница 10: ...G Tek Corporation Private Limited 9 Figure 6 LmNet connection with Adaptor and LAN Cable...

Страница 11: ...and all inputs and outputs conform to Mains Power Input Insulation Category ll All connections to secondary circuits must have basic insulation After installation there must be no access to live part...

Страница 12: ...same power lines that are used for instrumentation 5 The connection of the LmNet to a proper safety earth ground is essential Such a connection not only reduces the possibility of electric shock but a...

Страница 13: ...igure Figure 7 Wiring diagram for LmNet 5 1 1 1 Mains Supply Connection The connection for Mains supply is shown in figure 8 As per figure one end of the adaptor connected to mains connector Ensure th...

Страница 14: ...shielded wires or be routed through grounded conduit This minimizes the effects of RFI and ESD 3 Special care should be taken when wiring to relay or solenoid coils as large transients are produced w...

Страница 15: ...cted and configured to operate with a variety of signal sources as thermocouple RTDs dc current dc voltage etc The sensor wiring for different sensors is shown as under 5 1 1 3 Sensor Wiring RTD 3 Wir...

Страница 16: ...RTD 2 Wire Input Figure 11 Sensor Wiring RTD 2 Wire Input For 2 wire RTD sensor connect 2 wires of the sensor at and put an external short link between and W as shown in figure 11 Similarly connect fo...

Страница 17: ...tion Private Limited 16 5 1 1 5 Sensor Wiring Thermocouple Input Figure 12 Sensor Wiring Thermocouple Input Connect the 2 wires of Thermocouple sensor at of sensor connector as shown in Figure 12 Sens...

Страница 18: ...g m Volt Input Figure 13 Sensor Wiring m Volt Input The Sensor connection for mV input is shown in gure 14 Connect the and of the sensor to and respectively of sensor connector as shown in Figure 13 S...

Страница 19: ...O 20 mAmp Input Figure 14 Sensor Wiring 4 20 mAmp 0 20 mAmp Input 5 1 1 8 Re Transmitter Re Transmitter output Op1 gives 15 Volt Connecting LmNet and other instrument in series with Transmitter and Ex...

Страница 20: ...0 mAmp Input is shown in figure 16 For LmNet the shunt of 50 Ohms is externally supplied If you want to connect more than one instrument in series than LmNet should be placed in such a way that not mo...

Страница 21: ...ry to indicate temperature vary above or below the set temperature as shown in figure 17 Figure 17 Relay 5 1 1 10 Ethernet Wiring with LmNet Figure 18 Ethernet Wiring with LmNet Connect one end of Eth...

Страница 22: ...ed on LED display one by one in sequence To start the storage user must start the batch on the LmNet If the batch is previously running and is not stopped then after power up the batch will continue t...

Страница 23: ...of function menu ALL LED INDICATION AL1 AL2 AL3 AL4 These LEDs provided on display unit for Alarm High indication of their respective channel number If the input value goes out of range then display w...

Страница 24: ...UTHENTICATION PASSWORD If device is with password enabled option then it will allow the access of menu function only and only if password will match and pass authentication Basically device will ask f...

Страница 25: ...eze action Set Date and Time Set internal real time clock of LmNet Store Interval Interval of data storage in internal memory Range Low The minimum value shown on display when process inputs like 0 1...

Страница 26: ...igured using front panel Keyboard User can enter the configuration The following figure shows the main menu sequence Figure 21 Main menu display CHnL SCn CHnL 3 CJC CHnL 2 CHnL 1 Alrm on Alrm oFF Sys...

Страница 27: ...set this parameter then follow the below mentioned procedure by pressing the appropriate buttons given on the front panel of the LmNet 7 3 1 1 Batch status Start Stop Use to start new batch and stop...

Страница 28: ...alue To decrease the digit value To come out from functions sub menu 7 3 1 3 Memory Setting roll over stop on full To set Roll Over stop on full in memory setting of the devices then follow the proced...

Страница 29: ...is not used 7 3 2 Display Setting To watch the current data of different sensor channels digital inputs and digital outputs on led display then we must follow the procedure shown in figure 27 By using...

Страница 30: ...7 3 2 2 Action By using the Action menu for display setting of LmNet we can set the display continuously freeze or rolling to watch the current data from sensors up to selected panel To set display a...

Страница 31: ...battery that is not connected to the normal power supply It serves needs of real time data for LmNet By using RTC parameter we can set the Date Month Year Hour Minute second for LmNet device by Follow...

Страница 32: ...LmNet 7 3 5 Alarm On time Alarm On time is user settable parameter in seconds and minutes which will allow the sensors to settle in terms output readings For example if output to be expected to stable...

Страница 33: ...3 7 Channel Scan This functionality will allow to skip the output data from four channels it will not scan that channel even if sensor is connected on channel connector and will give output Nan on dis...

Страница 34: ...r for temperature follow the procedure shown in figure 35 by pressing the appropriate buttons given on the front panel of the LmNet 7 3 8 3 Alarm Set Point High In this parameter we must set the value...

Страница 35: ...There are 8 various parameters in each channel but each channel has its different parameter values according to its use decided by user Those parameters of every channel discussed below in detail To...

Страница 36: ...37 RTD Sensor 7 3 9 1 2 Thermocouple There are total 9 types of thermocouple inputs the LmNet accepts as listed under TC J It is made up of iron ve electrode constantan ve electrode It operates over...

Страница 37: ...140 C Its sensitivity is 68 uV C TC N It is made up of nicrosil ve electrode nisil ve electrode It operates over the temperature range of 200 to 1300 C temperature Its sensitivity is 39 uV C 7 3 9 1...

Страница 38: ...c 1 respectively and gives 1 volt 5 volt for logic 0 respectively To select sensor as RTD Thermocouple Process inputs then follow the below mentioned procedure by pressing the appropriate buttons give...

Страница 39: ...e of pressure if gone above 50 that is 50 100 then in this case the user must set the value of range low as 50 User can set the range low values anywhere between 3276 8 to 3276 7 To set the Range Low...

Страница 40: ...priate buttons given in the front panel of the LmNet 7 3 9 4 Offset Offset is the amount of deviation that occurs in the output due to calibration errors of the sensor Thus if there are deviations in...

Страница 41: ...To set the Resolution Decimal Place for a channel then follow the procedure shown in figure 45 by pressing the appropriate buttons given in the front panel of the LmNet 7 3 9 7 Alarm Set Point High I...

Страница 42: ...buzzer provided will set also the relay activate the Industrial buzzer make sound till value will not come back within range 7 3 10 Channel 2 Same as Describe in Type of Functions 7 3 9 CHANNEL 1 7 3...

Страница 43: ...ress 192 168 1 30 2 Default Gateway 192 168 1 1 3 Subnet Mask 255 255 255 0 4 Port no 502 5 Device Address 96 Follow the below steps to configure LmNet device with application 1 Connect device and PC...

Страница 44: ...n Private Limited 43 4 Right click on Local Area Connection and go into property Figure 48 Local Area Connection 5 Open Property of Internet Protocol Version 4 TCP IPv4 Figure 49 Internet Protocol Ver...

Страница 45: ...ration as per below given in image Figure 50 IP Setting 7 If you want to run the device in your LAN connection than follow the below steps 8 Click on network configuration and login with default usern...

Страница 46: ...G Tek Corporation Private Limited 45 9 Unmark DHCP button and make Network information as per your LAN configuration Figure 52 Network Information 10 Reconnect application using changed IP address...

Страница 47: ...ommunicate recorder using TCP IP For using LmNet communication in TCP IP mode connect the one end of Ethernet cable to the Ethernet port given at the bottom side of the LmNet and the other side of the...

Страница 48: ...e than 1 sensor at a time with the LmNet Yes there are 4 channels available at bottom of LmNet So user can connect at most 4 sensors to the LmNet and can use for measurements As shown in the above fig...

Страница 49: ...48 STANDARD ACCESSORIES 10 1 15 V DC 1 2 AMP ADAPTOR Figure 54 15 VDC 1 2 Amp Adaptor Input Voltage 100 240 V AC 0 35 Amp Operating Frequency 50 to 60Hz Output voltage 15V DC 1 2 Amp 10 2 ETHERNET CA...

Страница 50: ...0 V dc 0 1V 1V 0 5V 5V 0 10V 10V mA 4 20mA 0 20mA External Shunt Resistance of 50 0 1 Sensor Type and Range Refer to the Table5 Accuracy Accuracy 0 5 FSR Linearization Error 0 3 C Max Resolution User...

Страница 51: ...tile Flash Memory for Parameter Storage Password Yes User Settable Environmental Temperature Operation 5 C to 45 C Limiting 0 C to 50 C Storage 20 C to 60 C Humidity Operation 10 to 80 RH Non Condensi...

Страница 52: ...850 0 01 C 0 04 0 04 30ppm T C Type J IEC584 1 200TO 1200 0 02 C 0 05 0 06 25ppm K IEC584 1 200 To 1300 0 04 C 0 05 0 06 25ppm C Hoskins 0 To 2300 0 12 C 0 05 0 06 25ppm R IEC584 1 0 To 1750 0 04 C 0...

Страница 53: ...on Private Limited 52 ORDERING CODE LmNet order code is as below Table 6 LmNet Order Code Series Relay PC Interface Memory Size Sensor Type 6 LmNet with 4 Universal I P 0 None 4 TCP IP 0 32000 0 Unive...

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