3805E。3805E。3805E

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2.3 接地

    良好的接地是保证PLC可*工作的重要条件，可以避免偶然发生的电压冲击危害。接地线与机器的接地端相接，基本单元接地。如果要用扩展单元，其接地点应与基本单元的接地点接在一起。为了抑制加在电源及输入端、输出端的干扰，应给可编程控制器接上地线，接地点应与动力设备（如电机）的接地点分开。若达不到这种要求，也做到与其他设备公共接地，禁止与其他设备串联接地。接地点应尽可能*近PLC。

2.4 直流24V接线端  

    使用无源触点的输入器件时，PLC内部24V电源通过输入器件向输入端提供每点7mA的电流。  

    PLC上的24V接线端子，还可以向外部传感器（如接近开关或光电开关）提供电流。24V端子作传感器电源时，COM端子是直流24V地端。如果采用扩展船员，则应将基本单元和扩展单元的24V端连接起来。另外，任何外部电源不能接到这个端子。

    如果发生过载现象，电压将自动跌落，该点输入对可编程控制器不起作用。  

Eagle 5300-1000  SHIPSAMEDAY 1557M

Koganei ZC153B. L150185, Ship Same Day With 2-3 Days Shipping 1553F

Dodge Reliance Flange Mount Bearing F2B-8C-010, RACK D BOTOM D21

Efector 200, 0G5046, 0GP-FPKG/US-100, Shipsameday, BOX A 129A2

Festo MSSD-C-24-LED-M12-SA , 13002021, SHIPSAMEDAY 1628A30

MDC 410103 SS, BlankOff, .25S-25 ,  Shipsameday 115A7

Lumberg Cable RST 3-RKWT 4-3-610/2M RST 3-RKWT 4-3-S797/2M 1558G

Siemens 3TF2010-0BN4 & 3TX4490-3G Lot Of 7 ShipSameDay W/2-3Daysship1546Z1

Allen Bradley Selector Switch Green light 2 Pos, 800E-A2L, 1604P8

Fairchild BAW56, Power, Switching 85V 200mA A1, SHIPSAMEDAY N18

Swagelok Excess Flow Valve, 1/4 Tube gal/min (3.8 L) Spring, SS-XSS4-1 1610A6

Allen-Bradley 1492-CB2-G060  ShipSameDay 1654A12

Keyence PHOTOELECTRIC SENSOR PZ2-51T, PZ251T, Shipsameday 1629A1

KIP VALVE 641125, 1/8fnpt 120V 60HZ 100MOPD 10W Shipsameday ZG16

OMRON Cordset Single F39-JC3A-D, F39JC3AD, NNB, Shipsameday 1209F

Mitsubishi S-K12 & TH-N12KP, SK12, THN12KP, Shipsameday 132Z1

ALLEN-BRADLEY POWER SUPPLYS, 1771-P4S SERIES B, SHIPSAMEDAY1623MA

Swagelok BALL VALVE, B-42S4 & Parker Toggle 4Z(A)-V4L0-BP, 1/4T ZL3

Love Temperature Control Model HS-311, HS311, SHIPSAMEDAY 102N

Phoenix contact 3200124 Ferrule - AI 10-12BN - 3200124, Qty 200 102Z

PCI Jumper ST/UPC-ST-UPC Model JPR77STM01.5

Reliance Electric 0-52838, 801416-92A, Shipsameday M1

NSK Bearing 6800ZZ, 76710104, Shipsameday WITH 2-3 DAYS SHIPPING

FORGED Cross 3000 PSI STEEL 1-1/2 FNPT, A105, SA105, Z124

Parker Cross 3/4, 12KBZSS,  12KBZ-SS-GR, Shipsameday F17

NSK Bearing 636ZZ, 76710119, Shipsameday WITH 2-3 

Allen Bradley 871C-A5N18-N3 Proximity Sensor 871CA5N18N3 1647D

Swagelok Male Nut Face Seal Fitting SS-12-VCR-4, Shipsameday Box A 129G2

Entrelec M..4/60... Terminal Blocks M4/60z, Lot Of 46, SHIPSAMEDAY 1541S

Siemens Time Relay 110V, 7PU11401AJ20,  Shipsameday, 1219T

Allen Bradley Push Button 800MSX0A

SWAGELOK Tube Butt Weld Union Tee 3/8 316L-6TB7-3 / 316L-6TB7-9, Box 9 “D7”

Allen Bradley Analog Series Cable, 1771NC6, 1771-NC6, Shipsameday RACK H H89

TURCK VB2-RS-4.43T-0.3/2FKM4/S90, VB2RS4.43T0.3/2FKM4/S90, 1330T

Cui Stack Direct Plug In Class 2 Transformer, 41-12-300C, EIA 363 9940

Swagelok Tee Reducer 3/4 X 1/2, SS-1210-3-12-8, SS12103128, ShipsamedayZL19

GE Miniature Lamp 120PSB, 10Lamps, SHIPSAMEDAY N110

Tungsten Lamp Halogen, JC24V20W/G4, 24V-20W G4, SHIPSAMEDAY N111

SPD LF5H400RD, 5920-01-222-3597, ENT-6796-A, Shipsameday, ZC1

SMC BODY PORTED VF5120-5G-02,  VALVE, SGL, 1631AC

Cooper Busdmann SD25-3R3, SD253R3,  ShipsamDay D19

Cooper Busdmann SD25-6R8, SD256R8, ShipsamDay D20

Micrel IC REG LDO 5V/ADJ 0.25A 8SOIC, MIC2954-08BM, V15