GE IS200RCSAG1ABB

咨詢熱線--17750626260

 1、從PLC的外圍設(shè)備來考慮提高PLC的可靠性

    PLC是專門為工業(yè)生產(chǎn)環(huán)境而設(shè)計的控制設(shè)備。當(dāng)工作環(huán)境較為惡劣，如電磁干擾較強、濕度高、電源、輸入和輸出電路等易受到干擾時，會使控制系統(tǒng)的可靠性受到影響。

    1.1 工作環(huán)境的要求

    除了為特殊工作環(huán)境而設(shè)計的PLC外，一般PLC工作的環(huán)境溫度應(yīng)在0~55℃的范圍，并要避免太陽光直接照射；安裝時要遠(yuǎn)離大的熱源，保證足夠大的散熱空間和通風(fēng)條件；空氣的相對濕度應(yīng)小于85%，不結(jié)露，以保證PLC的絕緣良好。PLC應(yīng)避免安裝在有振動的場所；對振動源允許的條件則應(yīng)按照產(chǎn)品說明書的要求，安裝減振橡膠墊或采取其他防振措施?？諝庵杏蟹蹓m和有害氣體時，應(yīng)將PLC封閉安裝。

    1.2 電源的要求

    不同的PLC產(chǎn)品，對電源的要求也不同，這里包括電源的電壓等級、頻率、交流紋波系數(shù)和輸入輸出的供電方式等。

    對電磁干擾較強、而對PLC可靠性要求又較高的場合，PLC的供電應(yīng)與動力供電和控制電路供電分開；必要時，可采用帶屏蔽的隔離變壓器供電、串聯(lián)LC濾波電路等。在設(shè)計時，外接的直流電源應(yīng)采用穩(wěn)壓電源，供電功率應(yīng)留有20%~30%的余量。對由控制器本身提供的直流電源，應(yīng)了解它所能提供的大電流，防止過電流造成設(shè)備的損壞。

GITS 1/4" BRASS/GLASS LIQUID SIGHT LEVEL GAUGE 59-24-7000 NIB
 
SCOTT AIR RESPIRATOR FACEPIECE ASSEMBLY AV-2000
 
FLOWSERVE BRONZE BABBITTED THRUST SHOE SEGMENT 300B47EX1
 
WILLIAMS USA 9 1 7/16 WRENCH 20" LENGTH HANDLE
 
STB 0-5AC-AMPERES PORTABLE GROUND DETECTOR IN CASE MC01620
 
FYR 1/2-20+.005 HS NIB
 
MORSE NS 1-11/32" 2-FLUTE HS TWIST DRILL TAPER SHANK
 
FASTENAL 10 IN BAG FITTING 37408 / K LK #10-32 Z NIB
 
GATES POWERGRIP HTD SPROCKET 7825-0016 / 934-8M-20 SH NIB
 
CLEVELAND CLE-FORCE 31/64", NO. 2 TAPER SHANK DRILL BIT 940K 2555 0484 *NEW*
 
0-300PSI 0-21KG/CM2 WATER PRESSURE GAUGE 15026
 
FANUC 32 PT. EXT. CABLE 2M IC693CBL307A NIB
 
TCM OIL SEAL 30X62X7TC-BX LOT OF 6 NIB
 
STANLEY ASSEMBLY PNEUMATIC HEX HEAD IN-LINE SCREWDRIVER S30-390 *BENT PLUG*
 
BRIGGS + STRATTON FILTER-A/C CARTRIDGE 394018S, NIB
 
DRILL BUSHING HEAD LINER HL-48-16U LINER 0.5000", 1/2
 
SANDVIK COROMANT 7 IP TORX PLUS HEX HEAD SCREWDRIVER 5680 046-03 NNB
 
REXROTH NUT RUNNER MODEL ESA040G
 
BROWN & SHARPE GUAGE SET 1.3135/1.3240
 
ALLEN BRADLEY * LAMP REMOVAL TOOL * 800M-N5 SER B
 
STANLEY 1/2" DRIVE RIGHT ANGLE ELECTRIC NUTRUNNER EZ33LA19-60


CHICAGO PNEUMATICS W/APEX QR-A-08 1/4'' HEX DRIVE PISTOL GRIP PNEUMATIC DRILL
 
USA HIGH SPEED 2FLUTE DRILL BIT 21/32
 
ILSCO 1/0 STR WIRE CONNECTOR ADAPTOR CPM-1/0 7 IN BOX, NIB
 
ORIENTAL MOTOR HI425CT-GV W/LUBE GMN-10-200-CB2-?7L-CE, NNB
 
RIPLEY UTILITY TOOL WS 67 LCS/CLX (CB98) / WS-9D-1 / 28215-1 NIB
 
DODGE RELIANCE ELECTRIC 5-15/16" SEAL 043560 / 534TT515 NIB
 
PROTO COMBONATION WRENCH 1217MM BAG OF 12 0920-787P
 
MORSE THREAD FORMING TAP M10 x 1.5 GHII
 
PALL ULTIPOR III WATER FILTER CARTRIDGE NIB HC9100FKS4H
 
HONEYWELL BZE6-2RN ENCLOSED MICROSWITCH 15A 125/250/480-VAC NIB
 
JAMES G. BIDDLE CO. MOTOR & PHASE ROTATION TESTER MODEL 1
 
RED SHIELD 1" HEAVY DUTY TWIST DRILL TAPER SHANK 7C ST HS
 
CTC EPOXY FOR FIELD CONNECTORS ADP10008 NIB
 
GTD LITTLEGIANT 7/16" THREADING DIE 7/16NC14 104587
 
ATLAS COPCO 5/8" ELECTRONIC NUTRUNNER 4230 1705 80 / QMR62-46-RT / QRT 62 200
 
GRUNER BRASS * FITTINGS 1/2X1/2 FLARE FEMALE ELL NIB * 50-88
 
BLUE POINT * HAMMER * BPH-4A
 
ACOPIAN POWER SUPPLY B5G170
 
POSI LOCK HORIZONTAL ALIGNMENT TOOL SET AT-1108
 
PHILLIPS STA-DRY 6-2AWG HEAVY WALL HEAT SHRINK TUBING 6-212C NIB
 
SENIX MODEL UA-TD-422
 
GE LIGHTING FIXTURE FITTING MMI-E5G NNB
 
BROWNING 76300069 R2 2-5/8 BUSHING GEARBOX R2X2 5/8 C501 L-011 NIB
 
MCDANIEL CONTROLS INC. 0-3000PSI 1/4"NPT JN PRESSURE GAUGE 17122 NIB
 
UB X 4NS HSS HEXAGON THREAD DIE 58913
 
DODGE TAPER-LOCK BUSHING 119221 1610 X 1 1/8 IK NIB
 
SAFEUNIT 15-3 50-10 FLOWMETER W/ GAUGE
 
AC DELCO OIL FILTER PF16 LOT OF 2 NIB
 
PARKER CLIPPER OIL SEAL 2QTR12 NIB
 
MORSE HAND TAP M22 X 2.5 D7
 
CLARK PROBE VO2ORK, NIB
 
CLEVELAND TWIST DRILL 13/16"OD OPTI-METRIC ROUND ADJUSTABLE DIE *NEW*
 
K & E TOOLS KW-1176 RACHEPACT NUT RUNNER 1/2 INCH
 
HEECO CYLINDER BOOT/SLEEVE 42111
 
CHICAGO PNEUMATIC 3017 MMRR500 STRAIGHT PNEUMATIC AIR SHUTOFF NUTRUNNER 1/2 INCH
 
28RSC018 PISTOL CLUTCH SHUTOFF PNEUMATIC NUTRUNNER 1/2 INCH HEX
 
STANLEY PNEUMATIC NUTRUNNER A40LA2TAM-5A2 RPM 460
 
TIMKEN TAPERED ROLLER BEARING CUP L44610 NIB, LOT OF 2
 
DODGE 110749 HTD SPROCKET P56-8M-50-SK NIB
 
CREFORM METAL JOINT COMPONENTS LOT OF 7 FI-2
 
V. ENG. CORP. OIL FILTER FVWR10

OKIDATA 8MMX1600MM BLK MTX PRINTER RIBBON NIB, 5 IN BOX IP636 104404
 
PTD HSS NO. 16 TAPER SHANK 12 IN BAG 18016 / 0218-7324
 
HSS TAPER 2 FLUTE TAPER SHANK 1-11/64
 
MICRO SWITCH HEAVY DUTY LIMIT SWITCH LSYUB1A23-2D 0625
 
FALK GEAR COUPLING 1035 G NEW
 
BAILEY 0-30 PRESSURE GAUGE NIB 195151L3 103811