１、安裝位置PLC不能與高壓電器安裝在同一個開關櫃內。與PLC裝在同一個開關櫃內的電感性元件，如繼電器，接觸器的線圈應並聯RC消弧電路或續流二極管。PLC應遠離強幹擾源，如大功率晶閘管裝置、高頻焊機和大型動力設備等。
２、信號線與功率線應分開布線不同類型線應分別裝入不同管槽，信號應盡量*近地線或接地的金屬導體。當信號線長度超300M時，應採用中間繼電器轉接信號或使用PLC遠程I/O模塊。
３、信號傳輸通常，當模擬輸入輸出信號距PLC較遠時，應採用4-20mA或0－-10mA的電流傳輸方式，而不是電壓傳送方式。傳送模擬信號的屏蔽層為一端接地。為了泄放高頻幹擾，數字信號線的屏蔽層應並聯電位均衡線，並將屏蔽層兩端接地。
HONEYWELL 51400700-100 DHI BOARD BRAND FACTORY SEALED
DYNISCO G840E-844-52B-K23 RANGE 0-52 BARPUT 24VAC OUTPUT 4-20 MA
SIEMENS 3VF9221-1KM10 SHUNT TRIP / AUXILIARY SWITCH 50 AMP
FISHER PROVOX CL6611X1-FA8 VM03 W/COMM BOARD EXCELLENT TAKEOUT
SQUARE D S-FLEX SFD21CG4YN06 PUMP & FAN CONTROLLER 460V 1 HP.
HONEYWELL 51304286-100 REV.H CS/R MCPU BOARD BRAND
SIEMENS 6AV8100-1CB00-1AA1 TOUCH SCREEN P/N SCD 1597-RT (33) W/ CD & MANUAL
SIEMENS 6SE7022-2FC84-1HF3 POWER MODULE GOOD TAKEOUT
ASEA (ABB) YYT 102D (2668 180-586/1) GOOD TAKEOUT
HAUG STATIC LE DISCHARGG SYSTEM TYPE- EN SL (XLNT)
SIEMENS 64E/32AUSGAENGE I/O MODULE GOOD TAKEOUT
SIEMENS S22767-B1-A100 SAP-S1 V24 TERFACE MODULE
SIEMENS 6ES5955-3LC14 SIMATIC S5 POWER SUPPLY (GOOD TAKEOUT)
SIEMENS 6ES5928-3UB21 PROCESSOR UNIT CPU 928B WITH FLASH 6ES5 374-2KG21
SUNX RS-720H-1 BEAM SENSOR (BRAND )
YASKAWA USAMED-30MS2TD SERVO MOTOR ENCODER UTMAH-B15BS
CUTLER HAMMER 15RBA4-300E 15.5 KW 300E AMP FACTORY
MAYATECH CORPORATION 464290 BRAND NOT
SIEMENS 3RK1301-0BB13-0AA4 FAILSAFE DIRECT STARTER
SQUARE D S-FLEX SFD21CG3Y PUMP & FAN CONTROLLER 1 HP. 230V
EUROTHERM CHESSELL D103950-001-01-01-5098-K12 ( SURPLUS) 120-240 VOLT.
FOXBORO E96P-IA-B CS-E/FN-A MAGNETIC FLOW TRANSMITTER MANUFACTURER REFURBISHED
FUJI ELECTRIC MICREX-SX NP1L-TL1 T-LKMASTER MODULE
RO AS5027.001 ANALOG PUT BOARD (ANA.P. 8 CH)
FUJI FRN0-2C1S-2LJ FRENIC MI VERTER (200-240V) 1.8 AMP
AEG SCHNEIDER DEP218/AS-BDEP-218 DISCRETE PUT (16PT)
ACROMAG 1763-Y-U-1-C TRANSMITTER UNIT TELLIPACK SURPLUS
CUTLER HAMMER D120PS1 POWER SUPPLY SURPLUS
MANNESMAN-DEMAG UD-DPU500V020E10 DEMATIK AC REMAN.
SICK PS95W-24V-ENC (4 AMP POWER SUPPLY) 100-120/200-240 VAC
SIEMENS 6ES7 416-2FK02-0AB0 SIMATIC S7 CPU NO
BERTRONIK GMBH WUPPERTAL SR 101/5 RELAY
FUJI ELECTRIC MICREX-SX NP1Y16T09P6 DIGITAL OUTPUT MODULE
MOELLER EM4-101-DD2 EPANSION MODULE GOOD TAKEOUT
ACCU-CODER MODEL 711 PULSES PER REV. 1200 12V DC
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