201 Transmission Line Protection g Digital Energy • Phase segregated differential protection ensures secure high-speed single pole tripping • Complete IEC 61850 Process Bus solution providing resource optimization and minimizing total P&C life cycle costs • Reliable and secure protection on lines equipped with series compensation • Increased sensitivity through dynamic charging current compensation and communication channel asymmetry compensation • Advanced fault and disturbance recording, including internal relay operating signals thus eliminating the need for external recording devices • Phasor Measurement Unit - Synchronized phasor information according to IEEEC37.118 standard • Robust network security enabling Critical Infrastructure Protection through user command logging, and dual permission access control • Ambient temperature monitoring with alarming when outside temperature exceeds upper thresholds • Overhead lines including series compensated lines and underground cables of different voltage levels • Circuits with tapped transformer feeders • Suitable for three terminal line configurations, with channel redundancy and direct transfer tripping (DTT) • Wide area system monitoring and control and using integrated protection and synchrophasor measurement • Single and dual-breaker circuits requiring single pole/three- pole autoreclosing and independent synchrocheck supervision • Distributed busbar protection • Real time monitoring of remote, local and differential per phase currents • Oscillography - 64 samples/cycle, up to 64 records • Event Recorder - 1024 time tagged events, with 0.5ms scan of digital inputs • Data Logger - Up to 16 channels with user selectable sampling rate • P & M Class synchrophasors of voltage, current and sequence components – 1 to 120 frames/sec • Multi-ended fault location consistently providing 2% accuracy Monitoring and Metering Protection and Control • Phase segregated line current differential with adaptive restraint & Ground differential, stub bus protection • Thermal protection, under /over frequency, broken conductor • Phase Distance (three Zones) with independent compensation settings for in-zone power transformers • Ground distance (three zones) with independent self and mutual zero sequence compensation, reverse power • Reverse power, Out of Step tripping and power swing blocking • Thermal overload, phase, neutral and negative sequence directional overcurrent; and broken conductor • Over, Under and rate of change of Frecuency, Synchronism check for dual breaker applications Communications • Networking interfaces – 100Mbit Fiber Optic Ethernet, RS485, RS232, RS422, G.703, C37.94 • Multiple Protocols - IEC61850, DNP 3.0 Level 2, Modbus RTU, Modbus TCP/IP, IEC60870-5-104, Ethernet Global Data (EGD) • Direct I/O – secure, high-speed exchange of data between L90s for Direct Transfer Trip applications • Embedded Managed Ethernet Switch with 4 - 100 Mbit Fiber optic ports and 2 copper ports FEATURES APPLICATIONS KEY BENEFITS EnerVista™ Software • Graphical Logic Designer and Logic Monitor to simplify designing and testing procedures • Document and software archiving toolset to ensure reference material and device utilities are up-to-date • EnerVista™ Integrator providing easy integration of data in the L90 into new or existing monitoring and control systems • Robust communications with up to 8 HardFiber Bricks • Seamless integration with existing L90 functions • Redundant architecture for dependability and security IEC 61850 Process Bus Interface L90 Multilin™ LINE CURRENT DIFFERENTIAL SYSTEM Phase segregated line current differential and distance protection
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201
Tran
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g Digital Energy
• Phase segregated differential protection ensures secure high-speed single pole tripping
• Complete IEC 61850 Process Bus solution providing resource optimization and minimizing total P&C life cycle costs
• Reliable and secure protection on lines equipped with series compensation
• Increased sensitivity through dynamic charging current compensation and communication channel asymmetry compensation
• Advanced fault and disturbance recording, including internal relay operating signals thus eliminating the need for external recording devices
• Phasor Measurement Unit - Synchronized phasor information according to IEEEC37.118 standard
• Robust network security enabling Critical Infrastructure Protection through user command logging, and dual permission access control
• Ambient temperature monitoring with alarming when outside temperature exceeds upper thresholds
• Overhead lines including series compensated lines and underground cables of different voltage levels
• Circuits with tapped transformer feeders• Suitable for three terminal line configurations, with channel
redundancy and direct transfer tripping (DTT)
• Wide area system monitoring and control and using integrated protection and synchrophasor measurement
• Single and dual-breaker circuits requiring single pole/three-pole autoreclosing and independent synchrocheck supervision
• Distributed busbar protection
• Real time monitoring of remote, local and differential per phase currents
• Oscillography - 64 samples/cycle, up to 64 records• Event Recorder - 1024 time tagged events, with 0.5ms scan
of digital inputs• Data Logger - Up to 16 channels with user selectable
sampling rate• P & M Class synchrophasors of voltage, current and sequence
Protection and Control• Phase segregated line current differential with adaptive
restraint & Ground differential, stub bus protection• Thermal protection, under /over frequency, broken conductor• Phase Distance (three Zones) with independent compensation
settings for in-zone power transformers• Ground distance (three zones) with independent self and
mutual zero sequence compensation, reverse power• Reverse power, Out of Step tripping and power swing blocking• Thermal overload, phase, neutral and negative sequence
directional overcurrent; and broken conductor• Over, Under and rate of change of Frecuency, Synchronism
Modbus TCP/IP, IEC60870-5-104, Ethernet Global Data (EGD)• Direct I/O – secure, high-speed exchange of data between
L90s for Direct Transfer Trip applications• Embedded Managed Ethernet Switch with 4 - 100 Mbit Fiber
optic ports and 2 copper ports
FEATURES
APPLICATIONS
KEY BENEFITS
EnerVista™ Software• Graphical Logic Designer and Logic Monitor to simplify
designing and testing procedures• Document and software archiving toolset to ensure
reference material and device utilities are up-to-date• EnerVista™ Integrator providing easy integration of data in
the L90 into new or existing monitoring and control systems
• Robust communications with up to 8 HardFiber Bricks• Seamless integration with existing L90 functions• Redundant architecture for dependability and security
IEC 61850 Process Bus Interface
L90Multilin™
LINE CURRENT DIFFERENTIAL SYSTEM
Phase segregated line current differentialand distance protection
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Protection and ControlThe L90 is a high-end cost effective line current differential protection relay intended for transmission lines and cables of different voltages levels providing reliable and secure operation even under the worst case power system conditions. The L90 provides high-speed phase-segregated fault clearance suitable for single and three-pole tripping applications. Part of the Universal Relay family, the L90 comes with a variety of versatile features truly integrating protection, monitoring, metering, communication and control in one easy-to-use device. The Universal Relay family offers a high degree of modularity in its design and functionality providing superior performance in protection and control meeting the toughest requirements of the marketplace.
Segregated Current Differential ProtectionThe L90 is a phase segregated current differential protection relay, which uses superior and patented algorithms to address the challenges of bandwidth , security, dependability and sensitivity in current differential relaying.Bandwidth requirements are effectively addressed by means of a patented new data consolidation technique called “phaselets”. This permits application within a communications bandwidth of 64 Kbps,
and can detect faults within a half cycle plus channel delay.The L90 innovative dual slope adaptive restraint characteristic, based on estimates of measurement errors, allow the relay to be secure on severe external faults while maintaining sensitivity for internal faults. The estimate of errors in the input currents permits more sensitive settings than those used in the traditional percent differential schemes.The L90 approach to clock synchronization rel ies upon precise distr ibuted
synchronization. Clocks are phase synchronized to each other and frequency synchronized to the power system frequency. Each relay compares its clock to the phase of the other clocks and makes appropriate adjustments. This allows for greater transient ride-through for power system and communications disturbances.
Enhanced additional security is provided by a sensitive current disturbance detector, which can be used to supervise the current differential element.
The L90 is the single point for protection, control, metering, and monitoring in one integrated device that can easily be connected directly into DCS or SCADA monitoring and control systems like Viewpoint Monitoring as shown.
831706AS.CDR
L90 Line Differential System
52
Monitoring CLOSE TRIP
Data From/To Remote End(via Dedicated Communications)
Ground Instantaneous OvercurrentNeutral Instantaneous OvercurrentPhase Instantaneous OvercurrentNegative Sequence Instantaneous OvercurrentGround Time OvercurrentNeutral Time OvercurrentPhase Time OvercurrentNegative Sequence Time OvercurrentAC Circuit BreakerNeutral OvervoltagePhase OvervoltageAuxiliary OvervoltageNeutral Directional OvercurrentPhase Directional OvercurrentNegative Sequence Directional OvercurrentPower Swing BlockingOut-of-Step TrippingAutomatic RecloserSegregated Line Current Differential
FUNCTION
ANSI DEVICE NUMBERS AND FUNCTIONS
(senstive current disturbance detector)
Functional Block Diagram
L90 - Protection, Metering, Monitoring and Control
Device Number Function21G Ground Distance21P Phase Distance25 Synchronism Check27P Phase Undervoltage27X Auxiliary Undervoltage32 Sensitive Reverse Power49 Thermal Overload50BF Breaker Failure50DD Current Disturbance Detector50G Ground Instantaneous Overcurrent50N Neutral Instantaneous Overcurrent50P Phase Instantaneous Overcurrent50_2 Negative Sequence Instantaneous Overcurrent51G Ground Time Overcurrent51N Neutral Time Overcurrent51P Phase Time Overcurrent51_2 Negative Sequence Time Overcurrent52 AC Circuit Breaker59N Neutral Overvoltage59P Phase Overvoltage59X Auxiliary Overvoltage67_2 Negative Sequence Directional Overcurrent67N Neutral Directional Overcurrent67P Phase Directional Overcurrent68 Power Swing Blocking78 Out-of-step Tripping79 Automatic Recloser81U/O Under /Over Frequency, df/dt87L Segregated Line Current Differential
ANSI Device Numbers & Functions
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Ground Differential “87G”
The Ground Differential function “87G” protects against low-current single line-to-ground faults. It has a single slope characteristic and uses the vectorial sum of all in-zone phase currents to calculate the Neutral differential current. with the maximum value of phase current being used as restraint . This function together with the phase differential delivers enhanced sensibility and selectivity to the protection scheme.
Charging Current Compensation
For long transmission l ines and underground cables, the charging current may be large and result in excessively high pickup settings. The L90 can dynamically compensate the charging current thus increasing its sensitivity to the fault current on long transmission lines.
Enhanced Monitoring Features
The L90 uses an advanced error detection and supervising functions to secure the L90 against misoperation due to erroneous data. High bit errors are addressed by means of computing a 32 bit CRC check sums effectively addressing the concerns of multiple bit errors due to high channel noise. On multiplexed channels, channel asymmetry may be expected due to path switching spurious differential currents, which can endanger the security of the differential system. By using GPS time synchronization, up to 10ms of channel asymmetry can be compensated for. Extra security has been implemented in the L90 to ensure proper operation on the event of IRIG-B signal failure.Integrated channel monitoring provides real-time diagnostic data on the health of the L90. Communications channel deterioration or failure will activate an alarm, and can be used to enable backup protection. Channel propagation delay is monitored and adjusted according to variations in communication paths.
Communication Topologies
Relays can communicate through direct fiber, RS422, G.703, IEEE C37.94 interfaces at 64Kbps, with extensive channel monitoring and diagnostics are included. In a current differential scheme, the L90s exchange data via the communication
functions in L90 come with three zones of phase and ground distance (mho or quad). The phase distance elements come with built-in in-zone transformer compensation. The L90 also provides a load encroachment element , which supervises the distance elements under heavy line loading conditions.
Overvoltage and undervoltage protection
Long lines under lightly loaded conditions or no-load may experience voltages exceeding rated per unit voltage level of the line. Use the phase overvoltage element of the L90 to initiate a local trip as well as a remote trip using direct transfer trip.
Overcurrent Functions
TThe L90 provides thermal overload, time and instantaneous overcurrent elements for phase, neutral, ground, negative sequence, phase and neutral directional. Any of them can run in parallel with primary differential protection or can be programmed to run when the differential element is not available.
Typical two and three terminal application of L90. L90 supports a variety of media cards for signalling between L90’s including direct multimode or single mode fibre, RS422, G.703 and IEEE C37.94.
Typical Applications
link, acting either as master collecting data, making calculations and making all relevant trip and restraint decisions, or as slave only transmitting current data to the one acting as master. For two terminal applications, use the redundant communications capability of the L90 for optimal reliability of the current differential line protection. For this scheme, data is continuously transmitted over both channels, so if a failure occurs, the L90 will continue to provide current differential protection.For three terminal applications, advanced inter-relay communication features eliminate the need for redundant communication channels due to the ability of the L90 to automatically switch between master and slave mode, maintaining a dependable system even with a failure of one of the communication channels.
Distance
Separate high-speed phase and ground distance elements are provided for optional supervision with tapped transformers and as a back-up during channel failures or unavailability. The back-up distance the
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Single-Pole Tripping
The L90 relay uses a state-of- the-art dual phase selection algorithm that provides fast and accurate fault type identification even under weak-infeed conditions.
Direct transfer trip (DTT)
Use the direct transfer trip feature of L90 to trip remote breaker. Both single pole and three pole direct transfer trips are supported. Up to eight signals can be sent over pilot communications channels selectable through user configurable logic.
Autoreclosing
The L90 provides multi-shot auto reclosing for single pole or three pole auto relcose on all types of faults with independently settable dead time for each shot . Auto-reclose can be dynamically blocked by user programmable logic. Four different auto-relcose modes are available enabling the users to select the reclosing mode to suit specific applications.
Synchronism Check
The L90 monitors voltage difference, phase angle difference and slip frequency to ensure proper breaker closure as per user requirements. The L90 provides additional enhancements in synchronizing by allowing synchrocheck verification between local and remote line terminal voltages.
Breaker Failure
The L90 is able to provide fully independent breaker failure protection for the breakers associated to the line when connected to a substation with a breaker-and-a-half or ring bus arrangement. The L90 provides the required elements to perform two independent breaker failure functions.
Multiple Breaker Configurations
The L90 supports multi-breaker busbar configurations such as breaker-and-a-half or ring bus arrangements, providing dual breaker auto reclose, dual synch-check elements, and dual independent Breaker Failure elements. The design provides secure operation during external faults with possible CT saturation
Special Applications - Distributed Busbar
Use the L90’s capability of supporting up to 4 directly connected CTs for applications where the use of conventional bus differential relaying is not practical or economically feasible. The L90 can be used to protect both line and buses by measuring currents from the feeder CTs as shown. The L90 provides primary protection for both the buses and the circuit connecting them.
IEC 61850 Process BusThe IEC 61850 Process Bus module is designed to interface with the Multilin HardFiber™ System, allowing
bi-directional IEC 61850 fiber optic communications. The HardFiber System is designed to integrate seamlessly with the existing Universal Relay applications, including protection functions, FlexLogic, metering and communications. HardFiber System benefits:
• Communicates using open standard IEC 61850 messaging
• Drastically reduces P&C design, installation and testing labor by eliminating individual copper terminations
• Integrates with existing C70’s by replacing traditional CT/VT inputs with IEC 61850 Process Bus module
• Does not introduce new Cyber Security concerns
Advanced AutomationThe L90 incorporates advanced automation features including powerful FlexLogic™ programmable logic, communication, and SCADA capabilities that far surpass what is found in the average line relay. The L90 integrates seamlessly with other UR relays for complete system protection.
FlexLogic™
FlexLogic™ is the powerful UR-platform programming logic engine that provides the ability to create customized protection and control schemes thereby minimizing the need, and associated costs, of auxiliary components and wiring.Using FlexLogic, the L90 can provide required tripping and custom scheme logic for line breaker control and interlocking and dynamic setting group changes.
Scalable HardwareThe L90 is available with a multitude of I/O configurations to suit the most demanding application needs. The expandable modular design allows for easy configuration and future upgrades.
• Flexible, modular I/O covering a broad range of input signals and tripping schemes
• Mechanically latching outputs can be used to develop secure interlocking applications and replace electromechanical lockout relays
FlexLogicTM Designer
Flexlogic™ allows for customizing the L90 to operate and control the breakers and other auxiliary devices needed to fit most line protection schemes and applications.
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Monitoring and MeteringThe L90 includes high accuracy metering and recording for all AC signals. Voltage, current, and power metering are built into the relay as a standard feature. Current and voltage parameters are available as total RMS magnitude, and as fundamental frequency magnitude and angle.
Fault and Disturbance Recording
The advanced disturbance and event recording features within the L90 can significantly reduce the time needed for postmortem analysis of power system events and creation of regulatory reports. Recording functions include:
• Sequence of Event (SOE) - 1024 time stamped events
• Oscillography,
- 64 digital & up to 40 Analog channels
• Data Logger, disturbance recording – 16 channels up to 1 sample / cycle / channel
• Fault Reports
- Powerful summary report of pre-fault and fault values
• Multi-ended fault location
- calculating fault location on two or three terminal lines with 2% accuracy
The very high sampling rate and large amount of storage space available for data recording in the L90 can eliminate the need for installing costly standalone recording equipment.
CB1
CT1
CB2
CT2
CB3
CT3
CB4
BUS1
CT4
L90-2
Com
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chan
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CB5
CT5
CB6
CT6
CB7
CT7
BUS2
L90-1
831783A1.CDR
PROTECTEDLINE
VT3
VT21PH
CT2CB2CB1CT1
VT11PH
L90
Example of Distributed Bus Differential Protection Application. L90 Breaker-and-a-Half Application example.
Advanced Device Health Diagnostics
The L90 performs comprehensive device health diagnostic tests during startup and continuously at runtime to test its own major functions and critical hardware. These diagnostic tests monitor for conditions that could impact security and availability of protection, and present device status via SCADA communications and front panel display. Providing continuous monitoring and early detection of possible issues helps improve system uptime.
• Comprehensive device health diagnostic performed during startup
• Monitors the CT/VT input circuitry to validate the integrity of all signals
CommunicationsThe L90 provides for secure remote data and engineering access, making it easy and flexible to use and integrate into new and existing infrastructures. Fiber optic Ethernet provides high-bandwidth communications allowing for low-latency controls and high-speed file transfers of relay fault and event record information. The available redundant Ethernet option and the embedded managed Ethernet switch provide the means of creating fault tolerant communication architectures in an easy, cost-effective manner.The L90 supports the most popular industry standard protocols enabling easy, direct integration into monitoring and SCADA systems.
• IEC61850
• DNP3.0
• IEC 60870-5-104
• Modbus RTU, Modbus TCP/IP
Interoperability with Embedded IEC 61850
The L90 with integrated IEC 61850 can be used to lower costs associated with line protection, control and automation. GE Energy’s leadership in IEC 61850 comes from thousands of installed devices and follows on Multilin’s extensive development experience with UCA 2.0.
• Replace expensive copper wiring between devices with direct transfer of data using GOOSE messaging
• Configure systems based on IEC 61850 and also monitor and troubleshoot them in real-time with EnerVista™ Viewpoint Engineer
• Integrate Multilin IEDs and generic IEC 61850-compliant devices seamlessly in EnerVista™ Viewpoint Monitoring
Multi-Language
The L90 supports English, French, Russian, Chinese and Turkish Languages on the front panel, EnerVista™ setup software, and product manual. Easily switch between English and an additional language on the local displays without uploading new firmware.
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EnerVistaTM SoftwareThe EnerVista™ Suite is an industry-leading set of software programs that simplifies every aspect of using the L90 relay. The EnerVista™ suite provides all the tools to monitor the status of the protected asset , maintain the relay, and integrate information measured by the L90 into DCS or SCADA monitoring systems. Convenient COMTRADE and Sequence of Events viewers are an integral part of the UR Setup software included with every UR relay, to carry out postmortem event analysis to ensure proper protection system operation.
EnerVista™ Launchpad
EnerVista™ Launchpad is a powerful software package that provides users with all of the setup and support tools needed for configuring and maintaining Multilin products. The setup software within Launchpad allows configuring devices in real-time by communicating using serial, Ethernet , or modem connections, or offline by creating setting files to be sent to devices at a later time.Included in Launchpad is a document archiving and management system that ensures critical documentation is up-to-date and available when needed. Documents made available include:
• Manuals & Brochures
• Application Notes
• Guideform Specifications
• Wiring Diagrams
• FAQ’s
• Service Bulletins
Viewpoint Monitoring
Viewpoint Monitoring is a simple-to-use and full-featured monitoring and data recording software package for small systems. Viewpoint Monitoring provides a complete HMI package with the following functionality:
• Plug-&-Play Device Monitoring
• System Single-Line Monitoring & Control
• Annunciator Alarm Screens
• Trending Reports
• Automatic Event Retrieval
• Automatic Waveform Retrieval
Viewpoint Engineer
Viewpoint Engineer is a set of powerful tools that will allow the configuration and testing of UR relays at a system level in an easy-to-use graphical drag-and-drop environment. Viewpoint Engineer provides the following configuration and commissioning utilities:
• Graphical Logic Designer
• Graphical System Designer
• Graphical Logic Monitor
• Graphical System Monitor
Viewpoint Maintenance
Viewpoint Maintenance provides tools that will create reports on the operating status of the relay, simplify the steps to download fault and event data, and reduce the work required for cyber-security compliance audits. Tools available in Viewpoint Maintenance include:
• Settings Security Audit Report
• Device Health Report
• Single Click Fault Data Retrieval
EnerVista™ Integrator
EnerVista™ Integrator is a toolkit that allows seamless integration of Multilin devices into new or existing automation systems. Included in EnerVista™ Integrator is:
• OPC/DDE Server
• Multilin Drivers
• Automatic Event Retrieval
• Automatic Waveform Retrieval
User InterfaceThe L90 front panel provides extensive local HMI capabilities. The local display is used for monitoring, status messaging, fault diagnosis, and device configuration. User configurable messages that combine text with live data, can be displayed when user-defined conditions are met.
Record the operation of the internal L90 elements and external connected devices with 1ms time-stamped accuracy to identify the Sequence of Operation of station devices during line faults and disturbances.
Power System Troubleshooting
Graphically view zone settings for ground phase distance elements for the selected zones and the power swing detection element.
Analyze line faults using both analog and digital power system quantities that are measured and recorded up to a rate of 64 samples per cycle.
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Typical Wiring
L90-H00-HCL-F8F-H6G-L6D-N6K-S6C-U6H-W7A
L90
A B C
52
1
Powersupply
9
CPU
7
COM
8
CT/VT
6Inputs/outputs
*
6Inputs/outputs
*
6Inputs/outputs
*
6
Inputs/outputs
6Inputs/outputs
*
JU MX LW KV BHT DN GS FPR
RS-232
DB-9
(front)
UR COMPUTER
1
TXD RXD
RXD TXD
SGND SGND
1 832
207645
22
CONNECTOR
PERSONALCOMPUTER
CONNECTOR
2 23 34 45 56 67 78 89 9
DC
TOREMOTE
L90
OPTIONAL
TC
TC
N
2
1H1a
H2b
H1cH1b
H2c
H2a
H4a
H4c
H3bH3a
H4b
H3c
SURGE
H6a
H8a
H5b
H7b
H8b
H5a
H7a
H6c
H8c
H5c
H7c
H1
H2
H3
H4
I
V
I
V
I
V
I
V
6G
U8a
U7b
U7a
U8c
U7c U1b
U2b
U3b
U4b
U5b
U6b
U1a
U2a
U3a
U4a
U5a
U6a
U1c
U2c
U3c
U4c
U5c
U6c
SURGEU8b
U1
U5
U2
U6
U3
U4
6H I
V
I
V
I
V
I
V
I
V
I
V
N7a
N1a
N2b
N7c
N1c
N7b
N1b
N8cN8b
N2c
N8a
N2a
N4a
N5b
N4c
N6b
N3bN3a
N6a
N4b
N5c
N5a
N3c
N6c
6K N1
N5
N2
N6
N3
N7
N4
N8
CRITICALFAILURE
OUTPUT
CONTROLPOWER
HILO
1
FILTERSURGE
B3a
B1b
B8a
B6b
B8b
B6a
B3b
B1aB2b
B5b
Tx1 Rx1
Tx2 Rx2
INTE
R-RE
LAY
CO
MM
S.W
7A
FIBER
FIBER
6C
S1
S5
S2
S6
S3
S7
S4
S8
S7a
S1a
S2b
S7c
S1c
S7b
S1b
S8cS8b
S2c
S8a
S2a
S4a
S5b
S4c
S6b
S3bS3a
S6a
S4b
S5c
S5a
S3c
S6c
L6a
L8a
L5b
L7b
L5a
L7a
L6c
L8c
L5c
L7c
SURGE
L1a
L8b
L4c
L2c
L3aL3c
L1c
L3b
L1b
L4a
L2a
6D
minimum
PROVIDED
8L
F1c
F4a
F3c
F2c
F4c
F1a
F4b
F1b
F2a
F3a
F2b
F3b
IA IB IC IGIA5
IA1
IB5
IC5
IG5
IB1
IC1
IG1
F8c
F8a
F5a
F5c
F7c
F6a
F7a
F6c
VX
VA VB
VC VX
VA VB
VC
Multilin
com
10BaseFL
10BaseFL
10BaseT
D1aD2a
D4bD3a
D4a IRIG-BInput
IRIG-BOutput
COM1
RS485
ALTERNATE
NORMAL
Tx2Rx2
Tx1Rx1
BNC
BNC
FibreOptic
*
RemoteDevice
Shielded
Co-axial
Co-axial
com
10BaseFL
10BaseFL
10BaseT
D1aD2a
D4bD3a
D4a IRIG-BInput
IRIG-BOutput
COM1
RS485
ALTERNATE
NORMAL
Tx2Rx2
Tx1Rx1
BNC
BNC
FibreOptic
*
RemoteDevice
Shielded
Co-axial
Co-axial
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Ordering Notes:1 - For vertical mounting order codes, please visit our online store2 - To view the latest options available for the L90, or to order the UR Classic Front Panel, please visit our online store for more details.