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系统接地方式有：浮地方式、直接接地方式和电容接地三种方式。对PLC控制系统而言，它属高速低电平控制装置，应采用直接接地方式。由于信号电缆分布电容和输入装置滤波等的影响，装置之间的信号交换频率一般都低于1MHz，所以PLC控制系统接地线采用一点接地和串联一点接地方式。集中布置的PLC系统适于并联一点接地方式，各装置的柜体中心接地点以单独的接地线引向接地较。如果装置间距较大，应采用串联一点接地方式。用一根大截面铜母线（或绝缘电缆）连接各装置的柜体中心接地点，然后将接地母线直接连接接地较。接地线采用截面大于22mm2的铜导线，总母线使用截面大于60mm2的铜排。接地较的接地电阻小于2Ω，接地较好埋在距建筑物10~15m远处，而且PLC系统接地点必须与强电设备接地点相距10m以上。
信号源接地时，屏蔽层应在信号侧接地；不接地时，应在PLC侧接地；信号线中间有接头时，屏蔽层应牢固连接并进行绝缘处理，一定要避免多点接地；多个测点信号的屏蔽双绞线与多芯对绞总屏电缆连接时，各屏蔽层应相互连接好，并经绝缘处理。选择适当的接地处单点接点。
Tektronix Oscilloscope TDS 3034 300MHz 4 Channel
TEKTRONIX AWG2040 Arbitrary Waveform Generator 500 MHz
Tektronix TFS3031 OTDR TEK Ranger 2 * Tested *
Tektronix TDS754D 4 Ch 500 MHz, 2GSa/s Oscilloscope
option 13, 1F, 1M, 2C, + 2F
Tektronix TCP404XL/TCPA400 Current Probe and Amplifier
TEKTRONIX 1502C CABLE TESTER NEW
TEKTRONIX TDS784C DIGITAL OSCILLOSCOPE + 13 1F 1M 2F 2C
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K77294 Tektronix VX1401 Mainframe w/ 4 VX4367 Module
C51192 Tektronix DTG 5274 Data Timing Generator 2.7Gb/s
C51191 Tektronix DTG 5274 Data Timing Generator 2.7Gb/s
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Expedited shipping available
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TEKTRONIX SJ300E SONET/SDH JITTER & WANDER ANALYZER Opt
TEKTRONIX TDS 694C 3GHZ OSCILLOSCOPE
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Tektronix VM700A w/ opt's 01 / 30 / 40 / 48
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TEKTRONIX TLA 624 LOGIC ANALYZER WITH OPTIONS
Tektronix TDS 540A TDS540A scope, NIST-calibrated
additional free NIST recalibration within one year
SONY TEKTRONIX 3066 REALTIME SPECTRUM ANALYZER **SALE**
TEKTRONIX TDS3052 500MHz 5GS/s Digital OSCILLOSCOPE DPO
TEKTRONIX 2712 SPECTRUM ANALYZER 9KHz TO 1.8GHz 50 OHM
Tektronix 80E03 20 GHz Bandwidth Sampling Module
90 Day Warranty + 10 day Right of Return
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TEKTRONIX ST112 Sonet Transmission Test Set w opts
TEKTRONIX VX4750 VXI Function Generator / 25 MHz OPT 01
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Tektronix TDS654C/13/1F/2F Oscilloscope 500 MHz, 4 Ch.
NIST calibration/30-day warranty/14-day ROR, COLOR
Tektronix TLA704 Logic Analyzer Mainframe
Tektronix P7360A 6.0GHz Differential Probe Tested
TEKTRONIX TV 1350
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Inet Tektronix Spectra Turbo 7 SS7 Analyzer w/ 8 DLP+Po
One-day shipping available
Tektronix VX4780 16-Channel Signal Condition VXI Plug I
Tektronix TDS 460A 400 MHz 4 Channel Digital Real-Time
Tektronix TDS684C Digital Oscilloscope with Options
TEKTRONIX P7360A 6.0 GHz Bandwidth Differential Probe
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Tektronix THS730A Handheld Oscilloscope****
Tektronix VM700A opt;s 01 / 30 / 40 (Reduced!)
TEKTRONIX 1780R VIDEO WAVEFORM MEASUREMENT SET
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Tektronix AWG2020 Arbitrary Waveform Gen With Opt. 03
Tektronix 80A06 Pattern Sync Trigger Module CSA8000
Unit Tested & Guaranteed Functional w/ ROR!
Tektronix TDS 540D Digitizing Phosphor Oscilloscope 4Ch
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Tektronix TekRanger2 TFS3031 Mini OTDR Reflectometer
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