Digital Controller
Todays deals on Digital Controller?
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ALLEN BRADLEY DIGITAL SERVO CONTROLLER 1394-SJT05-C-RL $4,999.99 |
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ALLEN BRADLEY DIGITAL SERVO CONTROLLER 1394-SJT10-C-RL $4,999.99 |
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INDRAMAT DIGITAL AC SERVO COMPACT CONTROLLER DKS01.1-W050A-DA01-01-FW $4,850.00 |
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Allen Bradley 1394 Digital Servo Controller 1394-SJT10-T-RL Module 1394SJT10TRL $4,739.38 |
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INDRAMAT DIGITAL AC SERVO COMPACT CONTROLLER DDC01.2-N $4,500.00 |
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INDRAMAT DDS2.1-W050D DIGITAL AC SERVO CONTROLLER ***RFB*** $3,999.00 |
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NEW Allen-Bradley 1394C-SJT05-D 5KW SYSTEM MODULE DIGITAL SERVO CONTROLLER $3,791.50 |
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INDRAMAT DIGITAL AC SERVO CONTROLLER DDS03.2-W030-B $3,850.00 |
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INDRAMAT DIGITAL AC SERVO CONTROLLER DDS03.2-W050-B $3,850.00 |
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Allen Bradley 1394-SJT10-C-RL B 1394SJT10CRL B Digital Servo Controller Dr 10KW $3,849.76 |
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Nice Indramat Digital AC Servo Drive Compact Controller DDC01.2-N050C-DA02-01-FW $3,800.00 |
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Indramat Digital Compact Controller DDC01.2N050C-DA02-01-FW_DDC012N050CDA0201FW $3,800.00 |
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Allen Bradley 1394-SJT10-C-RL Series B Digital Servo Controller USED $3,650.00 |
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INDRAMAT DIGITAL AC SERVO CONTROLLER DDS02.1-W200-D $3,450.00 |
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Indramat Digital AC Servo Controller DDS 3.1 W030-R, DDS3.1W030R $3,195.00 |
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AB,ALLEN-BRADLEY BULLETIN GMC DIGITAL SERVO CONTROLLER 10KW 1394,AXIS 10KW,C7 $3,199.99 |
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FANUC A20B-1001-0120 16E AC DIGITAL SPINDLE DRIVE CONTROL $2,900.00 |
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PXI Board- Geotest GX5292 Digital I/O, 32ch, per pin control, up to 100 MHz $3,000.00 |
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Rexroth Indramat DKC01.1-040-7-FW Digital Servo Drive Controller EcoDrive 265406 $2,999.99 |
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Rexroth Digital Axis Control VT-HNC100-1-23/W-08-P-0_VTHNC100123W08P0_R900958999 $2,995.00 |
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AB,ALLEN-BRADLEY BULLETIN SERCOS DIGITAL SERVO CONTROLLER 5KW 1394,AXIS 2KW,QR $2,949.99 |
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AB,ALLEN-BRADLEY BULLETIN SERCOS DIGITAL SERVO CONTROLLER 5KW 1394,AXIS 2KW,KF $2,949.99 |
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AB,ALLEN-BRADLEY BULLETIN SERCOS DIGITAL SERVO CONTROLLER 5KW 1394,AXIS 2KW,JK $2,949.99 |
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AB,ALLEN-BRADLEY BULLETIN SERCOS DIGITAL SERVO CONTROLLER 5KW 1394,AXIS 2KW,CA $2,949.99 |
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INDRAMAT DIGITAL CONTROLLER DDS02.1-W150-D $2,850.00 |
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INDRAMAT DIGITAL AC SERVO CONTROLLER DDS02.1-W050-D $2,750.00 |
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MOOG T164-905A-50-C3-2-1A DIGITAL MOTOR CONTROLLER EXCELLENT USED CONDITION $2,800.00 |
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AB,ALLEN-BRADLEY BULLETIN SERCOS DIGITAL SERVO CONTROLLER 5KW 1394,AXIS 5,2KW,FF $2,799.99 |
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INDRAMAT DIGITAL CONTROLLER DDS02.1-W100-D $2,650.00 |
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MRL DIGITAL DRIVE CONTROLLER MOTOR CONTROLLER $2,500.00 |
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ALLEN BRADLEY 8520-SERA/A DIGITAL SERVO CONTROLLER ***NNB*** $2,499.00 |
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VICKERS DIGITAL PROCESS SERVO CONTROLLER $2,500.00 |
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Allen-Bradley / DIGITAL SERVO CONTROLLER / 1394C-SJT10-C-RL / – USED $2,500.00 |
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INDRAMAT R911270069 SERVO CONTROLLER DIGITAL $2,500.00 |
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Indramat Digital AC Servo Controller FWA-DIAX02-ASE-02VRS-MS_DDC01.2-N050C-DA02 $2,500.00 |
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Allen Bradley 1395 Digital DC Drive Controller 1395-A67-D1-P10 10HP $2,249.99 |
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Siemens 6SN1118-0DK21-0AA1 SIMODRIVE 611 DIGITAL CONTROL LOOP BLOCK $2,249.99 |
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CONTROL TECHNIQUES M45-14ICD QUANTUM III DIGITAL DC DRIVE 20HP ***XLNT*** $1,999.00 |
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CONTROL TECHNIQUES M45-14ICDQ QUANTUM III DIGITAL DC DRIVE 20HP ***XLNT*** $1,999.00 |
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INDRAMAT DIGITAL DRIVE AC SERVO CONTROLLER HDS03.2-W100N-HS12-0 $2,000.00 |
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SQUARE D DIGITAL TEMPERATURE CONTROLLER, MODEL 98 $1,999.00 |
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USED Indramat DDS02.1-A100-D Digital AC Servo Controller $2,000.00 |
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Contrex M-Rotary Precision Digital Controller 3200-1820 Rev S, HW 7300-1330 RevE $1,899.99 |
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SONY DIGITAL DAQ-1000 CUE EDITOR SYSTEM CONTROLLER $1,799.00 |
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USED Reliance Electric DDS-PF Compact Modeling Digital Location Control Device $1,850.00 |
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BOSCH DIGITAL DRIVE CONTROLLER SERVODYN DM 30K 1101-D $1,800.00 |
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BOSCH DIGITAL DRIVE CONTROLLER DM 15K 1101-D NEW $1,800.00 |
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BOSCH DIGITAL DRIVE CONTROLLER SERVODYN DM 008K 1101-D $1,800.00 |
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INDRAMAT DIGITAL AC SERVO CONTROLLER DDS00.1-W050-D $1,800.00 |
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BOSCH REXROTH DIGITAL CONTROLLER DMX-1X 4WRSE10V NEW IN BOX $1,825.00 |
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Bosch SE 200 digital controller 0 608 830 123 $1,799.00 |
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AB,ALLEN-BRADLEY BULLETIN SERCOS 1394 DIGITAL SERVO CONTROLLER 1394-SJT05-C-RL $1,759.99 |
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RELIANCE ELECTRIC DDS-PF COMPACT MODELING DIGITAL LOCATION CONTROL DEVICE F-TYPE $1,675.99 |
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SQUARE D DIGITAL TEMPERATURE CONTROLLER, MODEL 98 $1,699.99 |
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Leader LCR-745G Controlled Digital Meter. REDUCED PRICE $1,595.00 |
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Indramat DDS2.1-W150-D Digital AC Servo Controller K26/95 Indramat DDS *Tested* $1,500.00 |
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Bronkhorst E-7210 Mass Flow-Bus Controller Digital Power Supply / Readout System $1,500.00 |
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ALLEN BRADLEY SERVO CONTROLLER 1391 DIGITAL AC 1391-DES45-DI-AOB $1,499.99 |
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Digital Dynamics 54-106931A26 I/O Motor Controller New $1,499.99 |
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NEW CONTREX M-TRACK 2 DIGITAL CONTROLLER M TRACK 2 HAYSSEN MTRACK2 $1,499.90 |
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INTROL DESIGN DC1000-2015 USED DIGITAL BRUSHLESS SERVO CONTROLLER DC10002015 $1,500.00 |
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Indramat Digital AC Servo Control DDS02.1-W050-DA02-00 DDS 02.1-W050-DA02-00 $1,450.00 |
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Custom Servo Motors Motion Plus EDC 200 digital servo controller, MTS, PMC 20E $1,425.00 |
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INDRAMAT DIGITAL AC SERVO CONTROLLER DDS02.1-A150-D *USED* $1,400.00 |
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Indramat Digital AC Servo Controller DDS 2.1-W050-D, DDS2.1-W025-DA02-00 $1,375.00 |
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Indramat Digital AC Servo Controller DDS02.1-W050-D, DDS02.1-W050-DA01-00 $1,375.00 |
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NEW Siemens Moore 352P Single-Loop Digital Controller Plus Expanded SLDC $1,345.00 |
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@P9 Partlow MIC 6000 Profile Process Controller 1/4 DIN Digital Alarm Indicator $1,295.95 |
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Digital Dynamics I/O Motor Controller IOC V4.0 $1,250.00 |
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MICRISTAR MODEL 828 DIGITAL PROCESS CONTROLLER $1,279.99 |
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INTROL DESIGN DC 1000, DIGITAL BRUSHLESS SERVO CONTROLLER#DC1000-2015, 3PH $1,299.00 |
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ATLAS COPCO DMC DIGITAL MOTION CONTROLLER DMC31025P EXT $1,274.99 |
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Reliance 29571R 29571-R Digital Speed Control Potentiometer **NIB** $1,259.00 |
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Indramat Digital AC Servo Control DDS 2.1-W150-D DDS2.1-W150-D Controller Drive $1,225.00 |
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Indramat Digital AC Servo Controller DDS02.1-W050-D, DDS021W050D, DDSO2.1-WO5O-D $1,200.00 |
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FCI GF90 Digital Flow Controller Killark GRL-600L FE501 $1,200.00 |
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MOOG Drive T164-905A-10-C3-2-1A Axis Digital Motor Controller T164905A10C321A $1,175.00 |
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Celerity GF-125 Digital Mass Flow Controller (Cal’d any Gas/Range) 1 Yr Wrnty $1,175.00 |
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LOC-TITE DIGITAL DISPENSE CONTROLLER NEW!! #97101 $1,150.00 |
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Custom Servo Motors Motion Plus EDC100 Digital Servo Controller, MTS PMC 10E $1,150.00 |
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Tork DLC400BP Digital Lighting 4zone control Panel BAS EMS NEW in Box $1,149.99 |
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CS CLEAN SYSTEMS CLEANSORB controller digital board $1,088.00 |
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OFFER & WIN GSC 2600 Precision Digital Controller $1,000.00 |
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E-TEK Digital Laser Diode Controller DLDC-1002 $998.00 |
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GIPAM 2200 FN Digital protection relays Digital motor controller $1,000.00 |
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NOVELLUS 01-168109-00 Controller SESIOC SIOC Electrofill Digital Dynamics $1,000.00 |
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Kevex 4855 Digital Beam Control Interface Fisons EDS $999.99 |
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Bosch LTH12 TYP: 0 608 750 064, LTH 12 Digital Drive Servo Controller $999.00 |
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HONEYWELL DCP 700 DIGITAL CONTROL PROGRAMMER, FROM OUR “USED SPARES” INVENTORY $1,000.00 |
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MOOG BRUSHLESS TECHNOLOGY DIGITAL MOTOR CONTROLLER 164-005E-10-B2-2 $999.99 |
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MOOG BRUSHLESS TECHNOLOGY DIGITAL MOTOR CONTROLLER T164-905A-10-C3-2-1A $999.99 |
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MOOG BRUSHLESS TECHNOLOGY DIGITAL MOTOR CONTROL 164-005D-10-B1-2 $999.99 |
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PANASONIC FE-P301E DIGITAL CONTROL PANEL P550 BOX $999.00 |
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HORIBA STEC DIGITAL MASS FLOW CONTROLLER Z500 MODEL#SEC-Z512MG 330000129 B $1,000.00 |
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HORIBA STEC DIGITAL MASS FLOW CONTROLLER N2 100SCCM SEC-Z512MG 330000128 B $1,000.00 |
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Dynisco ATC ATC770-0-2-3 digital temperature Controller $985.00 |
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USED MOOG T164-907A-50-H1-2-2A Digital Position Control $1,000.00 |
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BAILEY CONTROLS DIGITAL CONTROLLER 53MC5 W/ ADAPTER KIT $1,000.00 |
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Indramat Digital AC Servo Controller DDS 2.1-W100-D, 11247202, DDS2.1W100D $999.00 |
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ATLAS COPCO DMC DMC310515 DIGITAL MOTION CONTROLLER $999.00 |
Digital Controller Questions
Wireless Pneumatic Direct Digital Control for the Energy Smart Building
How can the pneumatically controlled building advance with the times to be more sustainable without a disruptive and costly overhaul?
The Answer: By converting a building with working but outdated pneumatic control system to a Direct Digital Control (DDC), using wireless technology. Wireless pneumatic Direct Digital Control (DDC) provides rapid payback and minimal disruption to gain ongoing energy and maintenance cost savings, while improving comfort and operations.
Companies are always seeking ways to reduce costs and gain better economic advantages. A large number of buildings with pneumatic control infrastructure are falling behind in energy management as digital systems and networks become more common and critical. Their operating expenses and asset valuations are severely impacted as energy and maintenance costs rise and more value is attributed to energy efficiency and sustainability.
The conventional wisdom is that full conversion from pneumatics to DDC is the only path. Clearly DDC enables better control and optimization, but in most cases the existing pneumatic systems themselves are still functioning properly. DDC provides the flexibility over pneumatics that buildings need to operate intelligently (e.g. simple zone level control, scheduled setbacks, system coordination and load shedding). But the conversion path is too expensive and disruptive to existing tenants to be followed by most building owners. Their focus on financial performance and limited capital make it nearly impossible to entertain the five to ten year payback estimated for such a conversion. One public schools official described a 15 year plan to replace the pneumatic controls in its 30 school buildings.
The ideal solution would be a middle ground where the existing pneumatic system could be utilized with a DDC system, like a digital pneumatic version of a thermostat, but without having to install network wiring.
Wireless Pneumatic DDC Thermostat
Wireless Pneumatic DDC Thermostat Wi-Stat IIIp
Developing the recently released Wi-Stat IIIp wireless pneumatic DDC thermostat, Millennial Net has completely rethought how to address the challenges of pneumatically controlled buildings. It sought to cost-effectively combine the best proven technologies, not just add a wireless radio to the old-style mechanical pneumatic thermostat. Unlike conventional bi-metal pneumatic (mechanical) thermostats, the Wi-Stat IIIp is a solid state technology, operating without mechanical parts. It does not utilize the maintenance-intensive control mechanisms of the pneumatic thermostat that is to be replaced. The solid state technology improves control quality and responsiveness. Routine maintenance and recalibration are eliminated. Time and cost of installation are reduced as there are no wires, no adjustment screws and no need for calibration. The wireless network forms itself and data communications enable remote monitoring, adjustment and trending to ensure long term performance. Devices are immediately accessible bi-directionally via the internet and easily integrated with other automation systems.
Like Millennial Net’s first wireless pneumatic thermostat, introduced in 2008, the Wi-Stat IIIp is part of an extensive family of interoperating wireless controllers, sensors, meters and supervisory systems which utilize the IEEE 802.15.4 standard and 2.4 GHz radio band. The product is a major leap forward with advancements such as:
- Continuous branch-line pressure monitoring
- Leak detection and status notification
- Leak compensating operation
Wireless Helps
Wireless mesh network solutions are gaining acceptance as a reliable, practical and highly affordable means to retrofit existing buildings for monitoring, control and energy management. Several important capabilities are enabled by retrofitting buildings whether electric or pneumatic with wireless technology.
- Remote wireless set point control
- Programmable temperature setbacks
- No wiring or cable installation
Wireless lends itself particularly well for retrofit of pneumatic buildings because no power or network cables are present at the thermostat. Recently innovators and early adopters have stepped up to demonstrate in pneumatic buildings that significant energy efficient benefits can be achieved using wireless thermostats and sensors. Primarily these wireless devices focus on lowering the cost of retrofitting over conversion to DDC and the benefits of connectivity and visibility. One demonstrated that such a retrofit can be achieved with an install rate of less than 20 minutes, with the total install cost being a third of a wired solution.
Paybacks of 2, or even less than one year are certainly attractive, but is wireless communications added to fundamentally antiquated controls enough?
Advantages of Wireless and DDC Combined
Millennial Net’s wireless pneumatic DDC combines wireless communications, local processing, local and remote sensing, and closed/open loop controls. DDC and Wireless combine to reduce the time and cost of installation, operation and maintenance. Investment payback (typically 1-2 years) and sustainable energy efficiency are important reasons for this comprehensive control capability.
DDC helps better deliver occupant comfort while optimizing energy consumption and cost. This is important when seeking utility energy efficiency programs offering incentives and performance contracts that need assurances that expected energy reductions are enforced. Load management and automated demand response are also driven by policies. For example, the Millennial Net system implements such programs through a number of user-defined energy policies that are managed through the internet and distributed to each site and communicated wirelessly to each control device.
Important DDC features/capabilities to look for include:
- Modulation of pneumatic branch line pressure, acting on multiple inputs to accurately and responsively control zone temperature
- Detection of pneumatic leaks (supply and branch)
- Compensation of leak employing various strategies depending on severity
- Restriction to avoid simultaneous reheat and cooling
- Remote adjustment of control parameters (e.g. gain, proportional…) to refine controls based on performance trend data
- No adjustment screws, so need for calibration to reduce the cost of maintenance is eliminated
- Software configuration (e.g. reverse/direct acting units)
- Low power (long battery-life) operation of set point adjustment, modulated control and mesh communications,
About the Author
Mark O’Hearne is Vice President of Business Development and Marketing at Millennial Net. He develops and promotes MeshScape applications and programs for OEMs and resellers. mohearne@millennialnet.com
For more information on the Wi-Stat IIIp see http://www.millennialnet.com/psi.
Contact:
Millennial Net, Inc.
285 Billerica Road
Chelmsford, MA 01834 USA
Tel: +1 978-569-1925
Fax: +1 978-256-3162
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