IC697MEM715B
1．PLC的類型
PLC按結構分為整體型和模塊型兩類，按應用環境分為現場安裝和控制室安裝兩類；按CPU字長分為1位、4位、8位、16位、32位、64位等。從應用角度出發，通常可按控制功能或輸入輸出點數選型。整體型PLC的I/O點數固定，因此用戶選擇的余地較小，用于小型控制系統；模塊型PLC提供多種I/O卡件或插卡，因此用戶可較合理地選擇和配置控制系統的I/O點數，功能擴展方便靈活，一般用于大中型控制系統。
2．輸入輸出模塊的選擇
輸入輸出模塊的選擇應考慮與應用要求的統一。例如對輸入模塊，應考慮信號電平、信號傳輸距離、信號隔離、信號供電方式等應用要求。對輸出模塊，應考慮選用的輸出模塊類型，通常繼電器輸出模塊具有價格低、使用電壓范圍廣、壽命短、響應時間較長等特點；可控硅輸出模塊適用于開關頻繁，電感性低功率因數負荷場合，但價格較貴，過載能力較差。輸出模塊還有直流輸出、交流輸出和模擬量輸出等，與應用要求應一致。可根據應用要求，合理選用智能型輸入輸出模塊，以便提高控制水平和降低應用成本。考慮是否需要擴展機架或遠程I/O機架等。
3.電源的選擇
PLC的供電電源，除了引進設備時同時引進PLC應根據產品說明書要求設計和選用外，一般PLC的供電電源應設計選用220VAC電源，與國內電網電壓一致。重要的應用場合，應采用不間斷電源或穩壓電源供電。如果PLC本身帶有可使用電源時，應核對提供的電流是否滿足應用要求，否則應設計外接供電電源。為防止外部高壓電源因誤操作而引入PLC，對輸入和輸出信號的隔離是必要的，有時也可采用簡單的二極管或熔絲管隔離。
4.存儲器的選擇
由于計算機集成芯片技術的發展，存儲器的價格已下降，因此，為保證應用項目的正常投運，一般要求PLC的存儲器容量，按256個I/O點至少選8K存儲器選擇。需要復雜控制功能時，應選擇容量更大，檔次更高的存儲器。
RHP 30mm Take UP bearing, 13.5mm slot, 1305-25G,
SNR J1035 35GFS 35mm 2 Bolt Flange Bearing No
MRC Bearings 211R, 55mmID x 100mmOD x 21mm
Timken 45284 bearing only
Seal Master TB-24, 1 1/2" Tapped Base Bearing,
Torrington NTA-2435, Lot of 5 Bearings, in Box
Martin 60BS19, Sprocket 1" bore,
Timken Fafnir 5205K, Bearing, in Box
MCGILL, MS 51962 11, MI 16, Lot of 4, Bearings,
Timken 3120B, Stepped CUP , in Box
McGill FC4-25-1 1/4", 4 bolt Flang Bearing, in BOX
CR services 12700, lot of 11,
SNR 1225 25G, 25mm 2 Bolt Flange Bearing No
Timken 3193, 1 1/4" bore bearing
Martin DS40A15, Sprocket 3/4" bore,
INA LR5204KDD, 20mm Bearing
INA AS150190 Raceway Washer, 150mm x 190mm x 1mm
Browning VF2S-119, 2 Bolt Flange 1 3/16" Bearing
Hub City, TU220X1-7/16, Mounted Takeup Bearing, in
MB Bearings FC4-25 1 3/4" 4-bolt flange bearing NE
Timken 47490, Tapered Bearing,
RBC S32LCam Follower, 1" OD x .625"WD Lot of 3
42A42 Metric Sprocket, .76" rough bore, Lot of 2
Fafnir 9112PP, Bearing, in Box
Martin 50B27, Sprocket, 1" bore, 1/4" key
INA bearing KB2558PP, in box
US Tsubaki Power Lock 1 3/16 - 240107, Locking hub
IKO locking collar, PL 2 1/2", 2 1/2" ID x 3
Thomson A122026SS, Ball Bushing
The General, 55500, Precision Ball & Roller Bearings, L
Timken Fafnir 2707WN SU Bearing, in Box
Pacific Bearing PB12C, 3/4" ID, Closed Bearing, Ne
Dodge 124463, TBSC014, 7/8" tapped Base Flange Bearin
Fafnir VAS 1 3/16" Pillow Block Bearing in Box
Timken JH415610, CUP , in Box
IKO SBB20 Ball Bushing 1 1/4" x 2" x 1"w lot of 2
INA IR22X28X30, Inner Race 22mm, lot of 3 In Box
Peer 40MM Take up bearing, UCT208 40M 11/16, in Box
MRC 5202SBKF-H502 Bearing, 15mmID x 35mm x 15.9mmW
INA Bearing# K80X86X20A, Roller style
Koyo 5208CD3, 40mm x 80mm x 30mm Bearing
Martin 50BTB25-2012, Sprocket, #50, 25T
Fafnir 9107PP Bearing in
SKF, 6208-2RSJEM, Lot of 2, Bearings,
Gates, P20XL037, Lot of 2, Powergrips Timing Pully, 782
Timken JM822010, CUP , in Box
Timken, 55200C, Tapered Roller Bearing,
Koyo 25520, Cup, Lot of 3, in Box
Timkin 18520, Cup, Lot of 3, in Box
Timkin 527, Cone Bearing, in Box
NSK Bearing UCF204, N AV2S, 3/4" 4 bolt Flange Bearing,
CR Services, 21640, Seals lot of 6
Nachi 6213, C8*061226, 068-1914-647, Bearing, Made in
Nachi 6213ZZ, Bearing, Made in Japan,
Fafnir 5205K, 25mm x 52mm Ball Bearing
Timken YAK 15/16 Pillow Block Bearing
INA / MPB GT14 Thrust Bearing, 1.316ID x 2.344OD
INA B3 Bearing .753" ID x 1.469 OD x .625W lot of 2
Martin 1B66SDS QD bushed sheave 6.95" OD
Thomson, Super 20 OPN, Ball Bushing Linear Bearing,
INA bearing NK28/20, 28mmOD x 37mmID x 20mm
Nice 7520-DLTN Bearing, MADE in USA,
Hub City 1" Take-Up Bearing,TU250x1?, in Box
Fafnir VCJ-3/4 4 Bolt Flange Bearing in Box
Fafnir 210K Bearing, 50mmID x 90mmOD x 20mmW,
Timken 32304 tapered roller bearing,
IKO TLAM2220 Needle Bearing, 22mm x 28mm lot of 5
Martin 50A27, plate sprocket, Lot of 2, rough bore
Martin 60BS16 Sprocket, 1 1/2" bore, 3/8" key
Browning 60JA13, Bored for QD hub
Martin 60B12 Sprocket, 1 1/4" bore, 1/4" key
Browning 20HB100, TIMMING BELT PULLEY, 1 1/8" BORE
Timken Fafnir 25572, Bearing, in Box
Fenner Drives 620803, Tran touque, 16mm bore x 38mm OD,
Dodge, P2B-SC-110, Bearing, Pillow- 1 5/8", Setscrew Lo
Hub City, PB250X1/2, Pillow Bearing, 1/2" Bore, Self-Al
Morse BK47x1/2, 1/2" idle pulley, 4L or 5L sheave
Martin / Browning 50B19 5/8" bore , Lot of 2
Martin DS60A14, Sprocket 1" bore
Dodge FB-SC-012, 3/4" 3 bolt flange Bearing
Timkin 25821, Cup, Lot of 2, in Box
Timkin 30306M, 9/KM1, Cup and Cone Bearing, in Bo
Hub City PB250x1 1" pillow block bearing 2 set scre
Mcgill MI30 bearing race LOT OF 2
Brewer 40B19 Idle, Sprocket, 1" ID needle bearing, Idle
Browning H60P21 Taper Lock Sprocket
MB Manufacturig MFB1-38, 3 bolt Bearing, in BOX
MB Manufacturig MFB-7/8, 3 bolt Bearing, in BOX
INA GH20, Linear Bearing support 20mm,
LM/TARBELL L2438-24, Bearing,
McGill MR32, 2.5625" OD x 1.25" Wide Needle Bearing
Nice 1640DC, Bearing in Box TNTG18
50A20, plate sprocket, .625 rough bore
SKF 6209-2ZJEM, Bearing, in Box
Martin 40BS13HT, Sprocket 1" bore,
60B15 Sprocket, 1 3/8" bore, .312" key,
Sprocket 40A32, #40, 32 teeth, .625 bore, USA
McGill MR12RSS, 1.25" OD x 1" WD, Needle Bearing
Timken Bearing 15106, 1.0625" in Box
Ametric 46B14, 3/16" bore Metric Sprocket
Action Emerson UBPFL204 Bearing, 20mm Bore, 2 bolt flan
Timken Fafnir 15520 Race
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