描述
目前較為常用的RS232串口有9針D形串口[DB9]和25針D形串口[DB25]，最大通信距離為[15m]。兩臺設(shè)備的距離較近時，可以用232電纜線將它們的232串口直接相連；若距離較遠，可通過調(diào)制解調(diào)器(MODEM)相連。
RS232接口——
●采用“負邏輯”——輸出端用＋5V～＋15V表示[邏輯0]，-5V～-15V表示[邏輯1]。
●采用“單端驅(qū)動”——通過數(shù)據(jù)發(fā)送端[TD]輸出驅(qū)動電平，并以信號地GND為參考點。
●采用“單端接收”——通過數(shù)據(jù)接收端[RD]輸入接收電平，并以信號地GND為參考點。
RS232三線制——
能實現(xiàn)[點對點雙向通信]，需要3根通信線，主方的數(shù)據(jù)發(fā)送端[TD]與從方的數(shù)據(jù)接收端[RD]相連，主方的數(shù)據(jù)接收端[RD]與從方的數(shù)據(jù)發(fā)送端[TD]相連，兩方的信號地[GND]直接相連。
RS232使用注意事項——
RS232串口不能直接與RS485串口相連——因為它們的電氣標準不相同；市面上提供各種串口轉(zhuǎn)換器，必須通過轉(zhuǎn)換器才能連接。另外，不要帶電插撥串口，插撥時至少有一端是斷電的，否則容易損壞串口。
歐美品牌停產(chǎn)的，常用的“PLC”備品備件
我司產(chǎn)品應(yīng)用于以下領(lǐng)域：
1,《發(fā)電廠DCS監(jiān)控系統(tǒng)》
2,《智能平鋼化爐系統(tǒng)制造》
3,《PLC可編程輸送控制系統(tǒng)》
4,《DCS集散控制系統(tǒng)》
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5,《智能型消防供水控制系統(tǒng)》
6,《化工廠藥液恒流量計算機控制系統(tǒng)》
7,《電氣控制系統(tǒng)》造紙,印染生產(chǎn)線,變電站綜合自動化控制系列
本特利，英維思，伍德沃德，?？怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂，ACSO，力士樂等各大品牌的DCS系統(tǒng)配件，機器人系統(tǒng)配件，大型伺服系統(tǒng)備件。
Woodward 5461-651 Analog Input-8 Channel 4-20 mA
Woodward 5461-652 CURRENT INPUT
Woodward 5461-653
Woodward 5461-654 8 Ch RTD/input
Woodward 5461-655
Woodward 5461-656
Woodward 5461-659 DISCREET MODULE
Woodward 5461-661 Current Output Isolated-507(8 Channel)
Woodward 5461-768 Speed Control
Woodward 5461-769 Speed Reference
Woodward 5461-770 Speed Control
Woodward 5461-771 Speed Reference
Woodward 5461-772 Temp Control
Woodward 5461-773 SW Mode
Woodward 5461-774 Freq.Control
Woodward 5461-775 Amb.Bias Ramp
Woodward 5461-776 Accel.Schedule
Woodward 5461-777 Decel.Jump Rate
Woodward 5461-778 Liq.Final Driver
Woodward 5461-779 Fuel Transfer Card/Board
Woodward 5461-780 Gas Final Driver
Woodward 5461-781 Synchonizer
Woodward 5461-798 N1 Speed Control
Woodward 5461-880 RTD
Woodward 5461-892
Woodward 5461-944 Speed Control
Woodward 5461-975 Power Supply DCS 2 LV
Woodward 5461-975 Power Supply DCS 2 LV
Woodward 5462-017 DCS DIGITAL SPD SENSOR
Woodward 5462-085 FINAL DRIVER
Woodward 5462-117 POS TRANSDUCER
Woodward 5462-236
Woodward 5462-244 Liq.Final Driver
Woodward 5462-268 Mother Board for 505
Woodward 5462-292 Speed Sensor
Woodward 5462-336 Speed SENSOR
Woodward 5462-338 Power Aux Card
Woodward 5462-443 Fuel Transfer Card/Board
Woodward 5462-472
Woodward 5462-482
Woodward 5462-518 Speed SENSOR
Woodward 5462-519 Speed Control
Woodward 5462-520 Speed Reference
Woodward 5462-521 Power Sensor
Woodward 5462-522 Power Control
Woodward 5462-523 Power Refernce
Woodward 5462-524 Extraction Control
Woodward 5462-525 Pressure Prefernce
Woodward 5462-526 Ratio Limiter
Woodward 5462-527 Valve Ramp
Woodward 5462-528 Final Driver
Woodward 5462-529 Valve Ramp
Woodward 5462-530 Final Driver
Woodward 5462-531 Auxiliary
Woodward 5462-532 Pressure Channel
Woodward 5462-533 Power Prefernce
Woodward 5462-578 High Volt P/S
Woodward 5462-581
Woodward 5462-584 DCS Motherboard
Woodward 5462-651 ANALOG 8CH 4-20MA INPUT
Woodward 5462-718 SPEED SENSOR
Woodward 5462-749 COPROCESSOR
Woodward 5462-750 SEC.POWER SUPPLY
Woodward 5462-753
Woodward 5462-756
Woodward 5462-757 DISCRETE INPUT
Woodward 5462-758 DISCRETE OUTPUT
Woodward 5462-762 SIO Card
Woodward 5462-893 CPU Card
Woodward 5462-896
Woodward 5462-916 FTC-DCS II
Woodward 5462-917
Woodward 5462-944 DPS3/DT
Woodward 5462-948 T/C Card-8 Channel
Woodward 5462-966 Speed Sensor/Analog In
Woodward 5463-033
Woodward 5463-034 POWER AUX.N.C.
Woodward 5463-089 CPU
Woodward 5463-120 cpu module
Woodward 5463-124 Sio
Woodward 5463-127 SIO
Woodward 5463-140 Master CPU
Woodward 5463-141 Master CO CPU
Woodward 5463-143 Aux Memory
Woodward 5463-154 MODULE ASSY-509 DISCREET I/O
Woodward 5463-178 CPU Card
Woodward 5463-190
Woodward 5463-191
Woodward 5463-193
Woodward 5463-306 CPU Interface
Woodward 5463-306 Interface Module
Woodward 5463-338 RTD Input
Woodward 5463-372 FINAL DRVR
Woodward 5463-373 Analog Input Position Fdbk
Woodward 5463-375 Analog Input Position Fdbk
Woodward 5463-384 Analog Output
Woodward 5463-388 8CH RTD A/I
銷售熱線：18150087953