6ES7235-0KD22-0XA8網絡也需要傳輸介質和傳輸協議，這一點，PROFIBUS—DP網也不例外，PROFIBUS—DP參考模型是根據IEEE802標準委員會制定的局域網標準的第一層（物理層）、第二層（鏈路層）和用戶層建立的，根據實際需要省去了OSI（Open System Interconnection）參考模型七層協議的3—6層。

PROFIBUS—DP的物理層與OSI參考模型的物理層相同，其主要功能是利用物理傳輸介質為第二層數據鏈路層提供物理連接，傳送數據流，它采用RS485協議，半雙工方式，可以用光纜或屏蔽雙絞線，這主要取決于傳輸速率，當然也要考慮實際成本，可根據個人需要加以選擇。我廠現場總線網使用的是屏蔽雙絞線，實際使用基本能滿足需要。

6ES7235-0KD22-0XA8

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6SE6440-2UD41-1FA1  6SE6440-2UD41-1FB1  6SE6440-2UD41-3GA1  
6SE6440-2UD41-3GB1 6SE6440-2UD41-6GA1 6SE6440-2UD41-6GB1  
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Termotek P310 Recirculating Laser Liquid Chiller Lab

Termotek P310 Lab Recirculating Laser Liquid Chiller

TermoTek P407 Recirculating Laser Liquid Chiller P400

C70104 TermoTek P310 Recirculating Laser Chiller 18.0°C

TERMOTEK AG ASERKUHLUNG MODEL ZKS-3 P.N. 060512

Perbance Tech PT-RTM324-11965 CPC324 RTM RJ21 24port

Perbance Technologies CPC3400 24 Port 10/100 Switch 
One-day shipping available

Perbance Tech PT-RTM324-11965 CPC324 RTM RJ21 24port

Cutler-Hammer Control Relay D12CPC31T1 24V Coil 3NO-1NC

Perbance Tech PT-RTM324-11965 CPC324 RTM RJ21 24port

Perbance Technology CPC4406 24+2 Switch Board

SIECOR CPC-D24 FIBER CABINET CPC 24F CAP UNIV. DEEP *

SYSTIMAX 15 Ft Patch Cord CPC5512-03FO15 110 24-4PR

Lucent Alcatel CPC-B +24V Power Supply

Lucent CPC-A +24V Power Supply 

Lucent Alcatel CPC-A +24V Power Supply

Lucent KS24510L2A CPC-B POWER CONVERTER 24V DC/DC

SYSTIMAX 50Ft Patch Cords CPC3482-02F050 110 24-4PR 

3.6MM 24 IR CPC375 /36 1/3" Sony Super HAD CCD
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SYSTIMAX 15 Ft Patch Cords CPC5562-03FO15 110 24-1PR

SYSTIMAX 20Ft CPC3312-03F020 110 24-4PR STRANDED

SYSTIMAX 18 Ft Patch Cords CPC3312-03FO18 110 24-4PR

SYSTIMAX 12 Ft Patch Cords CPC5512-03FO12 110 24-4PR

SYSTIMAX 25 Ft Patch Cords CPC5512-03FO25 110 24-4PR

 1/3" Panasonic 24 / 12V Regular Color Camera CPC619
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(4)  6MM CPC375 /60, 1/3" Sony Super HAD CCD 24 IR 
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(4) 3.6MM 24 IR CPC375 /36 1/3" Sony Super HAD CCD
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 6MM CPC375 /60, 1/3" Sony Super HAD CCD 24 IR 
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LOT OF 24x Systimax CPC6642-08F007/D8PS-WH7/Network Cab

700RTCR00110U24  ALLEN BRADLEY 193CPC63 FREE SHIP
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Indramat DDS 2.1-W050-DS04-00 A.C Servo Controller 

Honeywell Ultraviolet Flame Amplifier - 7800 Series NIB
Allen Bradley AB 104-B180ND3 Series A Contactor
NIB Honeywell Sailswitch - 43A 1003 1 (2wire / 250Vmax)
Allen Bradley 1747-L511/B SLC 5/01 CPU 1747L511 / B
Allen Bradley 1756-DHRIO/B Logix DH+/RIO Communication
Allen Bradley 1747-L541/B SLC 500 5/04 1747L541
Allen Bradley 1747-L542/B SLC 5/04 CPU 1747L542 / B

6SE6440-2AC24-0CA1  6SE6440-2AC25-5CA1  6SE6440-2AD22-2BA1  
6SE6440-2AD23-0BA1  6SE6440-2AD24-0BA1 6SE6440-2AD25-5CA1 
6SE6440-2AD27-5CA1 6SE6440-2AD31-1CA1 6SE6440-2AD31-5DA1  
6SE6440-2AD31-8DA1  6SE6440-2AD32-2DA1  6SE6440-2AD33-0EA1  
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6SE6440-2AD37-5FA1