ICS TRIPLEX T3464機器人備件
對于較大的系統(tǒng)，必須添加額外的串行通道。商用中繼器也可用于在單個信道上添加32個以上的中繼器。合適的電纜應(yīng)具有120的特性阻抗? （例如Belden#9841）和總電線長度不應(yīng)超過4000英尺。商用中繼器將允許傳輸距離大于4000英尺。通信鏈路遠(yuǎn)端之間的電壓差并不罕見。因此，浪涌保護裝置內(nèi)部安裝在所有RS485終端上。在內(nèi)部，使用帶有光耦合數(shù)據(jù)接口的隔離電源來防止噪聲耦合。為了確保菊花鏈中的所有設(shè)備都處于相同的電位，每個RS485端口的公共端子必須連接在一起，并在主設(shè)備處僅接地一次。否則可能會導(dǎo)致通信中斷或失敗。源計算機/PLC/SCADA系統(tǒng)應(yīng)在內(nèi)部或外部安裝類似的瞬態(tài)保護裝置，以確保最大的可靠性。如下圖所示，僅在一點接地屏蔽，以避免接地回路。正確的極性也很重要。469必須連接所有“+”端子和所有“–”端子。每個繼電器必須菊花鏈連接到下一個繼電器。避免星形或短線連接配置。菊花鏈兩端的最后一個設(shè)備應(yīng)以120? ?瓦電阻器與“+”和“–”端子上的1 nF電容器串聯(lián)。遵守這些準(zhǔn)則提供了可靠的通信系統(tǒng)，不受系統(tǒng)瞬變的影響。圖2-23:RS485通信接口注釋469電機管理繼電器469電機控制繼電器469電動機控制繼電器GE Multilin 469電機監(jiān)控繼電器2-19 2安裝2.2電氣2 2.2.12介電強度可能需要在安裝469的情況下測試整個電機啟動器的介電強度（“閃光”或“hipot”）。469額定值為繼電器觸點、CT輸入、VT輸入、跳閘線圈監(jiān)控和安全接地端子G12之間的2000 V DC隔離。需要采取一些預(yù)防措施，以防止在這些測試期間損壞469。在控制電源、跳閘線圈監(jiān)控和濾波器接地端子G11之間使用濾波器網(wǎng)絡(luò)和瞬態(tài)保護鉗。這旨在濾除高壓瞬變、射頻干擾（RFI）和電磁干擾（EMI）。連續(xù)高壓可能會損壞濾波電容器和瞬態(tài)抑制器。在測試控制電源和跳閘線圈監(jiān)控期間，斷開濾波器接地端子G11。CT輸入、VT輸入和輸出繼電器不需要任何特殊預(yù)防措施。低壓輸入（小于30 V）、RTD、模擬輸入、模擬輸出、數(shù)字輸入和RS485通信端口在任何情況下都不得進行介電強度測試（見下文）。圖2-24：介電強度測試2-20 469電機管理繼電器GE Multilin 2.2電氣2安裝2 2.2.13雙速電機布線GE Multilin 469電機控制繼電器3-1 3用戶接口3.1 FACEPLATE接口3 3用戶接口3.1FACEPLATEL接口3.1.1顯示所有消息都顯示在40字符液晶顯示器上
For larger systems, additional serial channels must be added. Commercially available repeaters can also be used to add more than 32 relays on a single channel. Suitable cable should have a characteristic impedance of 120 ? (e.g. Belden #9841) and total wire length should not exceed 4000 ft. Commercially available repeaters will allow for transmission distances greater than 4000 ft. Voltage differences between remote ends of the communication link are not uncommon. For this reason, surge protection devices are internally installed across all RS485 terminals. Internally, an isolated power supply with an optocoupled data interface is used to prevent noise coupling. To ensure that all devices in a daisy-chain are at the same potential, it is imperative that the common terminals of each RS485 port are tied together and grounded only once, at the master. Failure to do so may result in intermittent or failed communications. The source computer/PLC/SCADA system should have similar transient protection devices installed, either internally or externally, to ensure maximum reliability. Ground the shield at one point only, as shown in the figure below, to avoid ground loops. Correct polarity is also essential. The 469s must be wired with all the ‘+’ terminals connected together and all the ‘–’ terminals connected together. Each relay must be daisy-chained to the next one. Avoid star or stub connected configurations. The last device at each end of the daisy chain should be terminated with a 120 ? ?-watt resistor in series with a 1 nF capacitor across the ‘+’ and ‘–’ terminals. Observing these guidelines provides a reliable communication system immune to system transients. Figure 2–23: RS485 COMMUNICATIONS INTERFACE NOTE 469 Motor Management Relay 469 Motor Management Relay 469 Motor Management Relay GE Multilin 469 Motor Management Relay 2-19 2 INSTALLATION 2.2 ELECTRICAL 2 2.2.12 DIELECTRIC STRENGTH It may be required to test a complete motor starter for dielectric strength (“flash” or “hipot”) with the 469 installed. The 469 is rated for 2000 V DC isolation between relay contacts, CT inputs, VT inputs, trip coil supervision, and the safety ground terminal G12. Some precautions are required to prevent damage to the 469 during these tests. Filter networks and transient protection clamps are used between control power, trip coil supervision, and the filter ground terminal G11. This is intended to filter out high voltage transients, radio frequency interference (RFI), and electromagnetic interference (EMI). The filter capacitors and transient suppressors may be damaged by continuous high voltage. Disconnect the filter ground terminal G11 during testing of control power and trip coil supervision. The CT inputs, VT inputs, and output relays do not require any special precautions. Low voltage inputs (less than 30 V), RTDs, analog inputs, analog outputs, digital inputs, and RS485 communication ports are not to be tested for dielectric strength under any circumstance (see below). Figure 2–24: TESTING FOR DIELECTRIC STRENGTH 2-20 469 Motor Management Relay GE Multilin 2.2 ELECTRICAL 2 INSTALLATION 2 2.2.13 TWO-SPEED MOTOR WIRING GE Multilin 469 Motor Management Relay 3-1 3 USER INTERFACES 3.1 FACEPLATE INTERFACE 3 3 USER INTERFACES 3.1FACEPLATE INTERFACE 3.1.1 DISPLAY All messages are displayed on a 40-character liquid crystal display that
