ACU-RITE 200S

The ACU-RITE 200 series with LCD screen technology offers the possibility of running different types of operations with just one readout.

Simply use the software to switch between turning mode or milling and drilling mode.

The context-sensitive graphical user support on the crystal-clear LCD screen makes working with the ACU-RITE 200 series a pleasure.

Milling Specific Features

  • Bolthole pattern calculations with graphics (full and partial circles/linear patterns)
  • Centerline calculation enables you to establish workpiece zero and midpoints
  • Edge finder input
  • I/O (option)

Turning Specific Features

  • Lock axis feature
  • Instant radius/diameter conversion
  • Taper Calculator
  • CSS (option)
Application Milling, drilling, turning
Axes 2 or 3 from A to Z and Z0
Encoder inputs TTL
Display step Adjustable, max. 7 digits
Linear axis: 1 mm to 0.0001 mm
Angular axis: 1° to 0.001° (00° 00′ 01”)
Display 5.7” monochrome flat-panel display for position values,
dialogs and inputs, and soft keys
Status display Tool, reference point, operating function, feed rate, ABS/INC, mm/inch, stopwatch
Axis display Standard
Functions
  • 10 reference points
  • 16 tools
  • REF reference-mark evaluation for distance-coded or single reference marks
  • Distance-to-go mode
  • Axis Coupling
  • Scaling factor
  • mm/inch switching
  • Absolute-incremental display
  • On-screen help and operating instructions
  • Graphic positioning support (Near Zero warning)
  • Calculator
For turning
  • Taper calculator
  • Radius/diameter switching
  • Freezing the tool position for back-off
  • Vectoring: X/Y display of the traverse path with inclined top slide
For milling/drilling/boring
  • Calculation of positions for hole patterns (circular and linear patterns)
  • Tool radius and tool length compensation
  • Probing functions for reference-point acquisition with Edge Finder: “Edge,” “Centerline” and “Circle center”
Cycles Oblique line, circular arcs; only for milling, drilling, boring: circular and linear hole patterns
Error compensation
  • Axis error: Linear and nonlinear over up to 200 points
  • Backlash compensation: for compensation of reversal error
Data interface RS-232-C/V.24 300 to 115 200 baud
Switching I/O
  • Input for Edge Finder (with switching signal or contact triggering)
  • Further input/outputs over the IOB 49 external input/output unit
Accessories Tilt/swivel mount, mounting arm, Edge Finder (for milling)
Power connection 100 V~ to 240 V~ (–15 % to +10 %), 47 Hz to 63 Hz; 30 W
Operating temperature 0° C to 45° C
Protection (IEC 60 529) IP 40 (IP 54 front panel)
Weight 2.6 kg

 

Acurite MILLPWR CNC

Powerful yet easy to operate CNC retrofit systems for knee mills and bed mills.

Faster set-ups, shorter run times and a major boost in productivity are just one “powerful easy” retrofit away. Our new MILLPWRG2 control and retrofit kits can turn just about any knee mill into a powerhouse money-maker.

USB and Ethernet compatible, it features a bright 12.1″ high resolution display, 1 GHz processor and plenty of programming capabilities – estimated runtimes, expanded tool/datum offsets, enhanced tool paths, plus a dxf converter.

Check out the new features:

  • USB + Ethernet compatible
  • Simplified navigation that eliminates multiple menu screens
  • Upgrades available for all legacy MILLPWR models
  • 12.1″ high resolution display with 3D graphics
  • 1 GHz processor
  • Available off line software
  • Estimated runtime feature
  • Expanded tool / datum offsets
NEW! MILLPWRG2 MILLPWR
External Storage USB / Ethernet (RS-232) Floppy / Compact Flash Remote Storage (RS-232)
Internal Storage 2.5 GB Flash (User) 512 MB Flash (Code & User)
Processor 1 GHz Celeron® M STPC 100
Display 12.1″
1024 x 768
10.4″
640 x 480
Windows Off-Line Programing Station  
Program Preview
(Listed & Graphic)
 
Filename Filter Search  
File Manager Navigation Tree Menu & Sub-menus
Estimated Machining Time  
Auto Save (Program)  
Program Size Limit 9,999 Steps 999 Steps
G Code Program
Extended Support Plus G80 Series Drill Cycles

(No Edit Capability)
Block Form Solid Model 3D Graphics
(w/ User Override)
 
Program Step Navigation Hard Keys & Pop-up Menu Hard Keys & Soft Key Paging
Custom Pocket & Islands
(Ramp Feed & Optimized Path)

(Plunge Feed)
Circle (Pocket, Frame, Ring, Helix
(Ramp Feed)

(Plunge Feed)
Tool Library
(Specify by Tool Number)
Multiple Datum’s (Fixture Offsets) 99  
Graphic View Line / 3D Shaded 2D
Error Compensation Linear & Bidirectional Non-linear Linear

Acurite SENC 150

The SENC 150 from ACU-RITE is the ideal scale for all applications.
The compact and robust design, and the numerous possibilities for mounting, make it ideal for retrofitting. The slight dimensions and high accuracies of this ball-bearing guided encoder, which uses the reflected light method, are ideal prerequisites for use in metrology applications.

  • Robust design
  • Resolutions from 0.5 µm to 5 µm
  • Output signals: TTL
  • Measuring lengths from 75 mm to 3075 mm
  • Distance-coded reference marks

Specifications

Measuring standard Glass scale with incremental graduation
Accuracy grade ± 5 μm
Measuring length ML Metric Mounting spar optional
75 100 125 150 175 225 275 300 325 350 375 400 425 475 525 625 675 725 775 825 875 925 950 1000 1050 1100 1250 1350 1400 1550
  Mounting spar included in items supplied
1675 1850 2000 2150 2300 2575 2825 3075
Measuring length ML Inch  
Incremental signals TTL TTL x 5 TTL x 10
Grating period
Integrated interpolation
20 μm
without
20 μm
5-fold
20 μm
10-fold
Signal period 20 μm  4 μm  2 μm 
Measuring step 5 μm 1 μm 0.5 μm
Reference marks Distance-coded
without load 5.1 V ± 0.1 V/< 180 mA 5.1 V ± 0.1 V/< 220 mA
Electrical connection Cable in metal armor, with 9 pin D sub connector; length: 4 m
starting from measuring length 1250 mm: length 6 m
Cable length ≤ 10 m (total length with ACU-RITE cable)
Traversing speed ≤ 60 m/min
Required moving force ≤ 3.4 N
Operating temperature Temperature 0 to +50 °C; humidity 25% to 95% (no condensation forming)
Storage temperature Temperature –20 to +70 °C; humidity 20% to 95% (no condensation forming)
Protection EN 60 529 IP 53 when installed according to mounting instructions
Weight 0.65 kg + 0.7 kg/m measuring length

 

Acurite SENC 50

As the result of its extremely compact dimensions, the SENC 50 linear encoder in many different types of applications and situations. It is especially suitable if the installation space is limited or otherwise restricted.

  • Compact dimensions
  • Resolutions from 0.5 µm to 5 µm
  • Output signals: TTL
  • Measuring lengths from 50 mm to 525 mm
  • Distance-coded reference marks

Specifications

Measuring standard Glass scale with incremental graduation
Accuracy grade ± 3 μm
Measuring length ML Metric Mounting spar optional
50 75 100 125 150 175 200 225 250 275 300 325 350 375 425
475 525
Measuring length ML Inch  
Incremental signals TTL TTL x 5 TTL x 10
Grating period
Integrated interpolation
20 μm
without
20 μm
5-fold
20 μm
10-fold
Signal period 20 μm  4 μm  2 μm 
Measuring step 5 μm 1 μm 0.5 μm
Reference marks Distance-coded
without load 5.1 V ± 0.1 V/< 180 mA 5.1 V ± 0.1 V/< 220 mA
Electrical connection Cable in metal armor, with 9 pin D sub connector; length: 3 m
Cable length ≤ 6 m (total length with ACU-RITE cable)
Traversing speed ≤ 60 m/min
Required moving force ≤ 2.2 N
Operating temperature Temperature 0 to +50 °C; humidity 25% to 95% (no condensation forming)
Storage temperature Temperature –20 to +70 °C; humidity 20% to 95% (no condensation forming)
Protection EN 60 529 IP 53 when mounted according to the mounting instructions
Weight 0.5 kg + 0.3 kg/m measuring length

 

Acurite VUE Readout Systems

The ACU-RITE VUE is an up-to-three-axis device mainly used as position display unit for simple infeed and positioning tasks, such as on grinding machines, drilling and boring machines, press brakes, crosscut saws, for positioning on rotary tables, etc. The clear and unambiguous display of the current position value on the large, clearly structured LCD screen makes working with the VUE easy and reliable.

The position display unit has a robust housing and a membrane keyboard.

Milling Specific Features

  • Bolthole pattern calculations with graphics (full and partial circles/linear patterns)
  • Centerline calculation enables you to establish workpiece zero and midpoints

Turning Specific Features

  • Lock axis feature – used in conjunction with tool offsetting, lets you establish tool offsets with the tool under load, resulting in reduced tool deflection.
  • Instant radius/diameter conversion

Specifications

Application Drilling, milling, grinding, positioning
Axes Up to 3 from A to Z
Encoder inputs TTL
Display step Adjustable, max. 7 digits
Linear axis: 1 mm to 0.0001 mm
Angular axis: 1° to 0.001° (00° 00′ 01”)
Display 5.7” monochrome flat-panel display for position values, dialogs and inputs, and soft keys
Status display Tool, reference point, operating function, feed rate, mm/inch, scaling factor, stopwatch
Functions
  • 10 reference points
  • 16 tools
  • REF reference-mark evaluation for distance-coded or single reference marks
  • Distance-to-go mode
  • Scaling factor
  • mm/inch switching
  • On-screen help and operating instructions
  • Graphic positioning support (Near Zero warning)
  • Pocket calculator
For turning
  • Radius/diameter switching
  • Freezing the tool position for back-off
For milling/drilling/boring
  • Tool radius compensation
Error compensation
  • Axis error: Linear and segmented over up to 200 points
  • Backlash compensation: for compensation of reversal error
Data interface USB (type B connector), up to 115 200 baud
Accessories Base, mounting arms
Power connection 100 V~ to 240 V~ (–15 % to +10 %), 47 Hz to 63 Hz; 25 W
Operating temperature 0° C to 45° C
Protection (IEC 60 529) IP 40, front panel IP 54
Weight 2.6 kg

Anilam Wizard 1000 ( for milling and turning applications)

The ANILAM Wizard 1000 readout for milling and turning applications is a fully programmable readout that allows the user to create, edit, and execute programs from the program mode. The Wizard 1000 provides the capability to create a library of program names, each independently labeled. Each program can hold multiple steps, resulting in the ability to generate a large number of program files.

Programming features such as tool step, datum step, preset step, circle pattern step (mill only), linear pattern step (mill only), and incline and arc milling steps (mill only) are just a few advantages of using the ANILAM Wizard 1000 4-axis programmable readout.

Available in the same LCD readout as a 2-, 3- or 4-axes display, the Wizard 1000 for milling comes complete with bolthole pattern calculations with graphics for full and partial circles and linear patterns, zero reset and preset features, tool diameter compensation, near zero warning, and every other operating feature available in ANILAM’s previous DRO product lines. The Wizard 1000 for turning applications comes complete with sixteen tool offsets that make it simple to compensate for different tool sizes. And when the tool offset is used with the axis lock feature, the tool deflection is reduced, even under load. The Wizard 1000 for turning also features a taper calculator.

  • Multiple program names with numerous steps
  • Multiple display views – DRO1 and DRO2
  • Job clock
  • Advanced skew compensation
  • Multiple language supports
  • On-screen help function
  • Bolthole pattern calculations with graphics (full and partial circles/linear patterns)
  • Centerline calculation enables you to establish workpiece zero and midpoints
  • 16 tool offsets/diameter
  • 2- or 3- or 4-axes Color LCD display
  • Preset and zero reset
  • Near-zero warning
  • Instant inch/mm conversion
  • 4 function calculator / Trig calculator
  • Linear and non-linear error compensation
  • Electronic edge finder input
  • Position-Trac™ – a unique feature that lets you easily, quickly and accurately reestablish workpiece zero after power loss

Anilam Wizard 411

The ANILAM Wizard 411 is a simple cost effective entry level solution for manual machine tool applications. The Wizard 411 features exclusive LCD display screen technology and versatile software to accommodate milling, turning or grinding applications. The ANILAM Wizard 411 is the first readout in the industry to display full text on a crystal clear LCD display. Plus, a content-sensitive help function assists you right on screen.

  • 1, 2 or 3-axes 5.7″ transmissive
  • LCD display
  • Job Clock
  • Feed rate display
  • Multiple language supports
  • Zero reset capability
  • Instant radius/diameter conversion
  • Absolute/incremental display
  • Instant inch/mm conversion
  • Conversational message prompts
  • Linear error compensation
  • Die-cast enclosure
  • Precision Glass Scales

Anilam Wizard 550

Setting new performance standards, the Anilam Wizard 550 integrates the latest innovations in electronic design, housed in a rugged die-cast chassis. The feather-touch keypad ensures long life and stability throughout the rugged shop environment. The DRO offers flexible features tailored for milling or turning applications. Plus, with the use of a touch probe, part inspection calculations can be performed without removing the part from the machine

Anilam Wizard 550 Standard Features

  • Rugged Die-Cast Chassis
  • Feather-Touch, Cap-Sense Keypad
  • 5.7″ QVGA Blue STN with CCFL Backlight
  • 2, 3, or 4 Axes with Optional Rotary Axis
  • Graphical Tool Path Verification
  • Customized Canned Cycles
  • CMM / Inspection Functions with Probe Capabilities
  • Feed Rate Display
  • Polar Co-ordinate Readings
  • Touch Probe Input
  • Teach Mode with Graphics
  • Intuitive Help Menus

Milling Specific Features

  • Bolt Hole Circle Routine (full and partial)
  • Line Hole
  • Frame (Pocketing)
  • Grid Array
  • Arc Function
  • Tool Length Compensation
  • Tool Diameter Compensation
  • Tap Drill Library

Turning Specific Features

  • Taper Calculation
  • Vectoring
  • Tool Offsets (99)
  • Axis Summing
  • Radius / Diameter Readings

CMM/Inspection Features

  • O.D. Calculations with Center Find
  • I.D. Calculations with Center Find
  • Datum Find

Easson ES 10

Endless Innovation and Quality Improvment
From our years of experience in digital readout (DRO) system manufacturing, in order to achieve high reliability and durability, not only the electronics and mechanical system design are important. It is also essential that the system must be constructed with highest possible specifications, good material and advanced production technology. Therefore, despite the serious market competition which keep driving the price of digital readout system lower and lower. ES-8 approach the market differently, we have chosen to reduce our cost by state of the art electronics design, efficient production management and the low overhead cost of our own factory in China. This substantial savings make it possible to produce the ES-8 with highest possible specifications and quality material & component to achieve the highest reliability and durability.

High noise immunity & EMC design
Latest triple stages noise filter is used in ES-8 for transducer signals input noise filtering which offer very wide frequency bandwidth ( 1KHz – 1000MHz ) noise attenuation.

Carefully thought out PCB and component layout that strictly follows all known rules to achieve highest possible noise immunity and EMC performance.

Linear power supply is used in ES-8 to ensure highest possible performance in noise immunity to the electrical source.

Adaptable to poor electrical source
Low power consumption approach is used in the system design of ES-8, therefore, even ES-8 is designed for very wide voltage supply range ( 160V~260V / 80V ~ 130V ) operation, linear power supply can still be used without serious heat generation, linear power supply offer execellent noise immunity and proven highest reliability.

Use of the combined capacitor-varistor noise filters in the power supply system to ensure highest possible noise and surge immunity to poor electrical source.

High Durability Switch Membrane
The Autotex series polyester film from UK’s AUTOTYPE Ltd. is used as the key membrane of ES-8. Autotex polyester film is known as the highest quality, highest specification membrane film available among the membrane switch manufacturing industry.

Autotex film offer excellent chemical resistance to most commonly used industry solvent and excellent switch life. Switch life of ES-8 is expected to be minimum 100,000 times.

Robust Aluminium Casing
The front plate of ES-8 is built by an 1.5mm thickness electroplated steel, ES-8’s enclosure is built by pressurized injection forming aluminium case to provide high quality robust casing, electrostatic powder spray paint is used in ES-8 to provide hard, scrape resistance, long lasting surface finish.

State of the Art Electronics Technology
Our lastest in-house design 16-bit 3 axes counting ASIC that is fabricated with 0.35um CMOS technology is used in ES-8. This greatly reduce the number of component counts, lower the system power consumption and improve reliability.

Advanced Production Technology
SMT assembling process is used in manufacturing of ES-8, all components are soldered by our in-house computerized control soldering machines to achieve high quality soldering.

Totally Sealed Enclosure
The enclosure of ES-8 is totally sealed to protect the electronics circuitry against the hazardous environment in shop floor, such as dust, evaporated coolant, fume from EDM machining and etc.

To avoid overheat of the PCB caused by totally sealed enclosure, metal front plate & panel is used in ES-8 to quickly dissipate the heat generated by the electronics circuitry and an ultra low temperature rise transformer is used.

Ultra Low Temperature Rise Transformer
To reduce the total heat generation inside the ES-8 in order to obtain long working life. An ultra low temperature rise transformer that construct with very high permeability iron core ( the Z11 series iron core of which the permeability is 18,000 gauss ) is used, which effectively bring temperature rise to only about 5’ C.

ES-10 series Digital Readout Cabinet
The ES-10 series is the latest full function readout series from Easson.. The design philosophy of ES-8 is to provide application specific functions for various type of general and specialised machines / instruments to achieve highest possible accuracy and efficiency. At this moment, there are ten professional models in the ES-8 series covering wide range of applications, from the simplest general use DRO to sophisticated geometric calculating functions readout cabinet for profile projector use.

Our objective is being the leader in application functions innovation. ES-8 is world first readout that provide specialized functions for Tool setter. It is also the world’s first DRO that provide three axes grinder functions for precision form grinding application.

Easson ES 12

ES-12 is the of top the rank Readout cabinet among all the Digital Readouts that manufactured by Easson. ES-12 has a 5.7 inch colour LCD display screen which provides inactive graphic displays, and step by step operation graphical guidance for all DRO functions, which makes ES-12 extremely user friendly. The design philosophy of ES-12 is to be the most easy to use DRO in the world which allows all operators can implement all the powerful DRO function within few minutes immediately after he switched on the ES-12.

The ES-12’s software is all-in-one software, provides the most powerful and comprehensive professional DRO functions for various type of machine applications.

ES-12 is 100% international class DRO, ES-12 can be operated under following seven different languages.

Easson ES 8

Endless Innovation and Quality Improvment
From our years of experience in digital readout (DRO) system manufacturing, in order to achieve high reliability and durability, not only the electronics and mechanical system design are important. It is also essential that the system must be constructed with highest possible specifications, good material and advanced production technology. Therefore, despite the serious market competition which keep driving the price of digital readout system lower and lower. ES-8 approach the market differently, we have chosen to reduce our cost by state of the art electronics design, efficient production management and the low overhead cost of our own factory in China. This substantial savings make it possible to produce the ES-8 with highest possible specifications and quality material & component to achieve the highest reliability and durability.

High noise immunity & EMC design
Latest triple stages noise filter is used in ES-8 for transducer signals input noise filtering which offer very wide frequency bandwidth ( 1KHz – 1000MHz ) noise attenuation.

Carefully thought out PCB and component layout that strictly follows all known rules to achieve highest possible noise immunity and EMC performance.

Linear power supply is used in ES-8 to ensure highest possible performance in noise immunity to the electrical source.

Adaptable to poor electrical source
Low power consumption approach is used in the system design of ES-8, therefore, even ES-8 is designed for very wide voltage supply range ( 160V~260V / 80V ~ 130V ) operation, linear power supply can still be used without serious heat generation, linear power supply offer execellent noise immunity and proven highest reliability.

Use of the combined capacitor-varistor noise filters in the power supply system to ensure highest possible noise and surge immunity to poor electrical source.

High Durability Switch Membrane
The Autotex series polyester film from UK’s AUTOTYPE Ltd. is used as the key membrane of ES-8. Autotex polyester film is known as the highest quality, highest specification membrane film available among the membrane switch manufacturing industry.

Autotex film offer excellent chemical resistance to most commonly used industry solvent and excellent switch life. Switch life of ES-8 is expected to be minimum 100,000 times.

Robust Aluminium Casing
The front plate of ES-8 is built by an 1.5mm thickness electroplated steel, ES-8’s enclosure is built by pressurized injection forming aluminium case to provide high quality robust casing, electrostatic powder spray paint is used in ES-8 to provide hard, scrape resistance, long lasting surface finish.

State of the Art Electronics Technology
Our lastest in-house design 16-bit 3 axes counting ASIC that is fabricated with 0.35um CMOS technology is used in ES-8. This greatly reduce the number of component counts, lower the system power consumption and improve reliability.

Advanced Production Technology
SMT assembling process is used in manufacturing of ES-8, all components are soldered by our in-house computerized control soldering machines to achieve high quality soldering.

Totally Sealed Enclosure
The enclosure of ES-8 is totally sealed to protect the electronics circuitry against the hazardous environment in shop floor, such as dust, evaporated coolant, fume from EDM machining and etc.

To avoid overheat of the PCB caused by totally sealed enclosure, metal front plate & panel is used in ES-8 to quickly dissipate the heat generated by the electronics circuitry and an ultra low temperature rise transformer is used.

Ultra Low Temperature Rise Transformer
To reduce the total heat generation inside the ES-8 in order to obtain long working life. An ultra low temperature rise transformer that construct with very high permeability iron core ( the Z11 series iron core of which the permeability is 18,000 gauss ) is used, which effectively bring temperature rise to only about 5’ C.

ES-8 series Digital Readout Cabinet
The ES-8 series is the latest full function readout series from Easson.. The design philosophy of ES-8 is to provide application specific functions for various type of general and specialised machines / instruments to achieve highest possible accuracy and efficiency. At this moment, there are ten professional models in the ES-8 series covering wide range of applications, from the simplest general use DRO to sophisticated geometric calculating functions readout cabinet for profile projector use.

Our objective is being the leader in application functions innovation. ES-8 is world first readout that provide specialized functions for Tool setter. It is also the world’s first DRO that provide three axes grinder functions for precision form grinding application.

Easson GS Series

Advanced Optical Measuring System
The slide carrier of the GS series scales,use a five bearing design for optical grating linear transducer which has been proven as the most reliable system design in today’s market.

The glass grating slideways are lapped, and JIS standard P5 grade bearings are used to achieve smooth and accurate movement and long working life.

Doubel Seals Design
The plastics seals of GS series scales use an innovative material to offer superior oil resistance, high elastic recovery properties and durability, carefully designed lips geometry offer low slide resistance.

100% Laser Calibration
All glass grating transducers are individually inspected and calibrated by our in-house laser interferometer to ensure measuring accuracy comply 100% with the specifications.

ASIC for signal interpolation
ASIC for signal Interpolation is built-in inside the GS Series Glass grating linear transducer to facilitate increased resolution of the grating. All frequency multiplication is implemented 100% by hardware phase shifting inside the ASIC to minimize the real time measurement error. Because all resistor ladders for phase shifting are constructed with the same piece of semiconductor inside the ASIC, which have same temperature coefficient, therefore. error drift caused by environmental temperature change is minimized.

Industrial standard output signal interface
The industrial standard TTL, RS-422-A and RS-485(optional, available upon request) digital signal output are available for user’s choice.

User can choose the most suitable signal interface according to their cost, power consideration & EMI requirements. Standard 9 pin DSUB9 and 7 pin DIN7 connectors are available for user’s choice.

  GS10 GS11 GS12 GS 13 GS20 GS21 GS 22 GS23 GS30 GS31 GS32 GS33
Measuring
Standard
Glass Scale – Grating Period : 20um(0.020mm)
Optical Detecting System Transmissive Infared system – : 880nm
Slide Carrier System Vertical Five bearings supporting system 450 five bearings supporting system vertical Five bearings supporting system
Resolution 5um 1um 5um 1um 5um 1um 5um 1um 5um 1um 5um 1 um
Measurement Travel
100~1200 mm
Every 50mm per length specification * not available * Every 50mm per length specification upto 500mm
Measurement Travel
1300~3000 mm
* not available * Every 1000mm per length specification * not available *
Accuracy
100~450 mm
±6um ±4um ±6um ±4um   ±6um ±4um ±6um ±4um
Accuracy
500~850 mm
±10um ±8um ±10um ±8um    
Accuracy
1050~1200 mm
±15um ±12um ±15um ±12um    
Accuracy
1300~3000 mm
  ±25um  
Repeatibility 2um (0.002mm)
Hysteris 3um (0.003mm)
Protection DIN 40050 IP53
Power Supply DC 5V ±5%
Output Signal TTL TTL EIA-422-A EIA-422-A TTL TTL EIA-422-A EIA-422-A TTL TTL EIA-422-A EIA-422-A