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完善接地系统良好的接地是保证PLC可靠工作的重要条件，可以避免偶然发生的电压冲击危害。接地的目的通常有　　两个，其一为了安全，其二是为了抑制干扰。完善的接地系统是PLC控制系统抗电磁干扰的重要措施之一。

　　PLC控制系统的地线包括系统地、屏蔽地、交流地和保护地等。接地系统混乱对PLC系统的干扰主要是各个接地点电位分布不均，不同接地点间存在地电位差，引起地环路电流，影响系统正常工作。例如电缆屏蔽层必须一点接地，如果电缆屏蔽层两端A，B都接地，就存在地电位差，有电流流过屏蔽层，当发生异常状态如雷击时，地线电流将更大。

HANSON WHITNEY 4-1/4IN. LONG PRECISION TAPS GH4-1098 *NEW LOT OF 2*

INGERSOLL-RAND/?ZIMMER TROLLEY-1000# CAP FOR Z30171-5 MISSING BOLT, LOT OF 2

WHITEY CHAIN 3/4" PITCH 10" 160 LINKS MSL SELF LUBE PRECISION ROLLER CHAIN 60-1R

HANSON 10,186RPM, 25.49MM BORE, 3"L GRINDING WHEEL HA46N7B 022150350 *NEW*

3/4" LOCKWASHERS 316SS NIB, 10 IN BOX

APEX IMPACT SOCKET EXTENSION EX-627-12 5/8"

BROWNING SPLIT TAPERED BUSHING R1 1 3/8 5/16 NIB

NIAGARA * FITTING NNB * PN8 1/2 NPT

STANLEY A30LA2TA-4 3/8" 400 RPM PNEUMATIC RIGHT ANGLE NUTRUNNER

GTD 5/8-11 NC HS TAP G H11 4 THREAD H0505 P

TOMAR ELECTRONICS INC. STROBELAMP 0947 M364A / 5001 NIB

GENERAL ELECTRIC 9134688G-1 LOT OF 10

NORTON 7260RPM 5 X 1 X 5/8 OAL GRINDING WHEEL 57A24-Q4B7 *NEW*

R&T CO. KEYSTONE REAMER 15/32 5-3/4" 6-FLUTE REAMER

GREENLEE 612 PISTON 1 1/2'' *LOT OF 3

DODGE D-FLEX 5JE SPLIT SLEEVE 004212 NIB

MILLER SCORPION SHOCK-ABSORBING LANYARD 3AE95 NIB

STANLEY 3/8" DRIVE RIGHT-ANGLE PNEUMATIC NUTRUNNER A23LA1CT-5

STARCUT 6-3/8" X 1.72" OAL CUTTING HOB 227568 *NEW*

GRACO 100 MESH FILTER SCREENS 210-732 *NEW* LOT 1 OF 5

WIDELL TAP 3 3/8-16 HSS

TYROLIT 63,5 x 76 x 12,7 35M/S, 10520/MIN GRINDING WHEEL 5927934 *NEW* LOT OF 19

BLACK & DECKER 3/8" HEAVY DUTY INDUSTRIAL CYCLONE DRILL 2664 MISSING BATTERY

ATLAS COPCO 3/8" DRIVE IN-LINE ELECTRONIC NUTRUNNER ETD ST61-20-10-T50 *NEW*

SCULLY-JONES 1-7/16 H TAP COLLET 01171 1/2 HT M 36

PRECISION 135 DEGREE SIZE 19 SPLIT POINT TWIST DRILL BIT 501-6 *NEW, BAG OF 12*

AERO-SEAL 3-1/8"X6" / 79-152MM HOSE CLAMP LOT OF 10

UNION BUTTERFIELD M14 X 2 D7 4 FLUTE BOTTOM HAND TAP 1012506 SET OF 3

UB JM CARPENTER TAP AND DIE CO. 1-1/8" TAP

REGAL 1-1/8-7 NC 4-FLUTE HAND TAP 50275W NIB

CARD 1-7/8" 8 NS 6-FLUTE HAND TAP B-1

BLACK PANTHER DETROIT MICH, 2 FLUTE HIGH SPEED DRILL BIT 53/64

MARTIN SPROCKET M1616 2-3/8"SQ. LOT OF 3 SEALED

BESLY 1/2 20 NF HS GH1 4 FLUTE

IRON AGE SIZE-7 PROTECTIVE BOOTS ANSI Z41PT83 / M I/75 C/75

FISHER SCIENTIFIC CO. 3"X1" MICROSCOPE SLIDES NIB, LOT OF 2 12-549 104187

3/4"X9-1500WR 316SS/FG SPLWND GASKET 69-16-1330 NNB

WINTER 1 1/4-12 GH-14 NF HS

FASTENAL HEX CAP SCREW G5 3/4-10X1-3/4 NC HZP

NORTON 3"x1-1/2"x5/8" 4 PIECES ALUNDUM GRINDING WHEEL H 2146753-1 NIB

NORTON 3-7/8"x1/4"x1-1?/4" MAX RPM 9075 DIAMOND WHEEL CB150-TBB-1/4

NIAGRA CUTTER 2 FLUTE SINGLE ENDMILL HSS 1-1/8"

STARRETT 24"-30" MICROMETER SET IN CASE NO. 724

ATLAS COPCO LTV 25SR/LTV18R SERVICE KIT, 4081-0085-90 *NEW*

MAINETIRE 10x7x6-1/4 10 RB HARD RUBBER PRESS ON FORKLIFT TIRE SMOOTH 467

STANLEY 625 RPM 1/2" STRAIGHT PNEUMATIC CLUTCH SHUTOFF NUTRUNNER, A40MF-6

STABILICERS ICE/SNOW STRAP-ON STABILIZERS SZ10-1/2-1/2 NIB

WOODS SLEEVE FOR SURE-FLEX COUPLING 4JE, NIB

GO & GO CO 10 FLUTE 3x3/4x1 .260 RAKE MILL CUTTER D-15645 HSJJ NNB

KORNS 1/2 CONDUIT SUPPORT CLAMP LOT OF 3 NIB

HUOT DRILL INDEX DRILL BITS 33/64 TO 3/4 BY 1/64

FLEXCO HD 3/8"-13/16" BELT FASTENERS RP2E NIB

MARTIN QD BUSHING SDS 1 5/8 NIB

EMT 3/4" MOUNTING BRACKET H75SWB / H-1-SBS LOT OF 6

3M 5" X 1 -3/8" TYPE E 268L MICROFINISHING FILM PSA DISC ROLL 051144 81110 *NEW*

HSS 5-FLUTE DIE 3/4 NF16

UB HSS 7/8" DRILL BIT

UTD 7/8 END MILL 51-10382 NIB

R+N 1 1/2"-11 1/2 NRT HSG

STANLEY A40LRATAM-5A2 ANGLE PNEUMATIC CLUTCH SHUTOFF NUTRUNNER 3/8 INCH

TAPE-PAK 100'X1/8" STEEL TAPE & WINDER 31-024

NATC 3/4"-16 NF USA 7-4703 NIB

IRWIN STRAIGHT SHANK DRILL BIT SIZE D *NEW* LOT OF 6

UTD 2-FLUTE 1-31/64 13" HS-12 TWIST DRILL SHANK C

UNION BUTTERFIELD 1" 2-FLUTE END MILL 0316P

COLUMBUS MCKINNON 3/8" WIRE ROPE CLIP NIB M248

NUMATICS 32MM BORE 295MM STROKE RODLESS CYLINDER S1211320295M00 *NEW*