BMXCPS2000 施耐德Schneider 高功率標準電源模塊
BMXCPS2000 施耐德Schneider 高功率標準電源模塊
BMXCPS2000 施耐德Schneider 高功率標準電源模塊
信號變送器是一種對各種信號進行處理的設備,如溫度信號、電
流、電量信號等,它的工作原理:首先將變送器或儀表的信號,
通過半導體器件調(diào)制變換,然后通過光感或磁感器件進行隔離轉(zhuǎn)
換,然后再進行解調(diào)變換回隔離前原信號,同時對隔離后信號的
供電電源進行隔離處理。保證變換后的信號、電源、地之間絕對
獨立。
功能
1.保護下級的控制回路。
2.消弱環(huán)境噪聲對測試電路的影響。
3.抑制公共接地、變頻器、電磁閥及不明脈沖對設備的干擾;同
時對下級設備具有限壓、額流的功能是變送器、儀表、變頻器、
電磁閥PLC/DCS輸入輸出及通訊接口的忠實防護。
KLG系列導軌結構,易于安裝,可有效的隔離:輸入、輸出和電
源及大地之間的電位。能夠克服變頻器噪聲及各種高低頻脈動干
擾 。
20-750-ATEX 1面價1818
3BHB049374R0001 1
124-6DJ00-0AX0 1
SDCS-MEM-8 2
匯川 IS650NT060IUX-WG 1
ES2000-9725 6
ATV955U75N4 1
A5E38510058-AB 1
6AG4010-5EC33-0XJ5
ASE00297617數(shù)量2
0762.960 Enraf 5
0762.970 Enraf 4
Enraf UAAN766D09500880 1
Enraf UAAN766D12301160 1
Enraf U815C/223/CT/45 S0815343 3
Enraf U815C/223/CT/90 S0815344 4
Enraf U815C/0260/S/0090 0815350 4
0854.956 Enraf 854 ATG 5
Honeywell Enraf S0854.962 3
Honeywell S0854953 3
Honeywell Enraf S2100.418 3
Honeywell Enraf 854 ATG S0854340 3
Honeywell Enraf 854 XTG S0894340 3
Honeywell Enraf S0854151 5
VITO MTT 762, UT**762*AGA 6
RLE-2000 1
RUSB-02 ADAPTER-KIT 2
AS15050HA2BL 20
P9220BSW1D3CD0 4個
5SDA21F3204 300個
CP502 5個
20AC060A0AYNANC0 48706 1
MFM1CSZ34N7 1
AJ65BT-RPI-10B 1
HEIDENHAIN TS 640 ID: 620189-15 1
MDX61B0110-5A3-4-00 1
647-0AF11-3AX0 1
FMC122 3個
FMC126 3個
Lenze EZAEM-ECMB80BR001 4 個
霍尼韋爾 DC1040CL-301-000-E/聚束(J&D)DB5090 1
INTERFACE CABLE
Part No: 30752453-501
FOR SMART FIELD COMMUNICATOR
Make: Honeywell
Weidmuller 8869420000 10
Weidmuller 1608570000 100
Weidmuller 8869440000 10
Weidmuller 1010200000 50
Weidmuller 1020100000 (WDU 4) 100
Weidmuller 1772090000 50
Weidmuller 7910210000 50
Weidmuller 8869750000 10
Weidmuller 1016700000 50
Weidmuller 1123580000 10
Weidmuller 1181100000 10
VIPA 253-1DP31 1
VIPA 221-1BH30 2
VIPA 222-1BH30 1
Euchner 088084 (TZ1RE024MVAB-C1684) 4
PR 5243498557 Item 11180435 1
MPN800T-N163 1
SKF22210EK 4
SKFTSN510L 6
Euchner HBA-093787 1
FC302P22KT5E20H2XGC 1
交流測速機,美國Artus pacific scientific廠家,型號V11G4MA-115SAD/80 7
NSK PROFIBUS NS2101ST 1
6ES5247-4UA21 1
BLII-D50/50A 1
E4809-436-0060-B 1
6GK1161-6AA02 1
ECSCA064C4V 數(shù)量2
MPC240 1
AGP3301-L1-D24 1
Kolmorgen CR10250 2pc
WL24-2B230, P/N: 1015852 SICK 2
WL34-V240, P/N: 1019244
DS50 Dc 10v--30VDC, Max Output<=180mW
DL100-21AA2101, P/N: 1052684
BTF13-A1AM1020, P/N: 1034301
BTF08-A1AM0240, P/N: 1034299
DFS60B-BHEC10000, P/N: 1079029
AFM60B-BHAA004096, P/N: 1054924
MFH 5-1/4B (Order Code:15901): Festo
SV - 1/4 - 5/3 BBY (Part Number: 23040110): MAG
017A1694-01 Danfoss 2
各2 孟加拉
MFH 5-1/4B (Order Code:15901) Festo 2
ERA33NFC UFI 1013: UFI 4
SV-1/4-5/3 BBY: MAG 2
RXRM-08A-XBO 8
RXIR-01A-XXS 8
R2XYRP-IN03J-XXPVB 10
R8XMIR-06INA-XHPVL 8
Datakom D-500-MK3數(shù)量2
ACS550-01-038A-4-R3 1
Lenze EZAEM-ECMB80BR001 4個
IBACom-L2B-8-8數(shù)量1
3TH82 44-0XH0 AC48V 4NO+4NC數(shù)量27
EH-E56VC-20EE5 1
LM400WF3O0E1-74926113;A.2034-00110031; 10
VAS-1T25N/LW , P/N: 88012366: Kromschroder 6
VAN1T15N/NKG , P/N: 88016108 3
VAN-1T25N/NKGR , P/N: 88015084 3
VAS125/-R/NQSR , P/N: 88013017 4
VAS1-/NQSR , P/N: 88013088 4
UVS10D1G1, P/N: 84315202 A1330023236 4
BCU460W3P1c0d0000K1e1-, 230vac,P/N: 88680129 6
孟加拉
40180-02,數(shù)量20
40113-02,數(shù)量2
E5CC-RX2ASM-800 6
20SF1W0CSN 4
20-750-C6-W400CS480 2
2711F-T12C4D8 1
GT2715-XTBA 2
BLII-D75/50A 1
TS2651N221E78 2
maxon;型號:DC41.022.022 1
DTS035M-PT100 1
NPT-1K.00.1.3 1
XSAV11801 1
KFD2-UFC-1.D 1
EVD532-E 1
EVD532-E 1個
HOHNER PR90H2XCLC-CIAOO 4
889772AM
0.18/0.05mm R516.4/14057歐姆
TOURS 5832/9216 1個
4PPC30.0702-23B 3
R88D-KNO8H-ECT 1
515929-02 2個
A06B-6250-H045
A06B-6270-H006
A06B-6290-H207
A06B-6290-H208
A06B-6290-H209 各1
1SBL137501R1200 45
1SBL137201R1200 14
1SBL297201R1200 14
1SBH137001R1222 100
1SVR730120R3300 10
A06B-0233-B100 1
A06B-6127-H207 1
A06B-6114-K504 1
A06B-6114-K505 1
A06B-6127-H104 1
A06B-0233-B400 1
A06B-6150-018 1
A81L-0001-0163 1
A02B-0306-B802 1
A20B-1008-0360 1
A03B-0819-J011 1
Bedien-PC 15 1
A08B-00082-C200 1
A02B-0303-C231 1
A02B-0236-K170 1
A02B-0303-C328 1
A03B-0819-J104 1
A03B-0819-J182 1
A03B-0819-C104 1
A02B-0236-C244 1
A03B-0819-J183 1
A06B-6127-H105 1
A06B-0265-B100 1
A02B-0306-B822 1
A13B-0199-B524 1
A08B-0090-B003 1
A08B-0090-D173 1
TDM 1.2-30-300-W0 (INDRAMAT) 1
TDM 1.2-100-300-W1 1
KDA 3.2-150-3-A00-W1 (INDRAMAT) 1
MAC 112-C-0-HD (INDRAMAT) 1
ABB
1TGE120021R6010 2
1TGE120021R8010 2
1TGE120021R8110/1TGE120021R6110 6
伊頓電源板DILH1400/250V 2100-0254-0115-05k 1
6AV6381-2BH07-5AV0 1
6AV6381-2BS07-5AV0 1
6SL3210-1PE24-5AL0 一臺 帶制動電阻
6SN1145-1BA02-0CA2 30個
961-3BA20 2
870-1AA01-0YA0 1
416-2XN05-0AB0 3
436-2BA00 2
3RW4446-6BC44 3
3VF3211-5ES71-0AA0 3
3RW2241-0DB15 3
145-1BA02-0CA1 30
PFVI401 3BSE018732R1 1
6ES7952-1AY00-0AA0 1個
ACS800-01-0030-3+P901 1
6GK1140-1AA00 5 塊
6AV2145-6GB06-0AA0 1個
2711P-T15C4A8 103612 4
2711P-RN15S 7266 4
2711P-T10C15D1 55400 3
2711P-T10C4D8 68952 2
ETR4-11-A
DILMC150
數(shù)量2
1784-U2DHP 1個 41923
440R-N23126 1個 2152
2TLA050220R0025 4
NMTCV2 數(shù)量2個
6SL3120-2TE15-0AD0 1
22D-D6P0N104 1 面價10762
22D-D010N104 4 面價12914
22D-D012N104 4 面價15576
IPR9268/203-000 1
6SE7016-0TP60 1
140M-C2E-B40 616 2
140M-C2E-B25 616 1
IC695CPE305-AFBA 2個
IC695ACC400-AA 2個
ACS800-104-0580-7+C126+E205+V991 1
22A-D8P7N104 10496 2
REM543CM216AAA PCS 1
REM543CG214AAA PCS 1
REF610C11HCHR PCS 1.
ATV1200C700/045P 1
2090-CFBM7DD-CEAA30 6040
2094-EN02D-M01-S1 19693
2094-BC07-M05-M 68542
MPL-B680D-MJ72AA (99E-71BY (9299A-1500)(870078-MHSF3 - 660) 76811
各1
6ES7134-6FB00-0AB0 2
TB807 10
TU841 4
TK811V015 25
3BHB016790R0001
3BHB019466R0001
3BHB019461R0002
3BHL000406P0102
3BHB026354R0001
數(shù)量各1
6AG1124-0GC01-4AX0 2
XPSAT5110 1
20-750-DENC-1 2726
20-750-ENC-1 1438 各1
6MF1013-0CJ38-0AA0
6MF1013-0CJ37-0AA0
6MF1113-0CJ35-0AA0 各1
6AV6671-8XB10-0AX0 1
6AV7241-3BA04-0JA2 1
6AV7882-0GC30-8CA0 2
6SN1145-1BA01-0BA2 1
6RA8093-4DV62-0AA0 2
6RY1702-0CA00 1
6ES4214-1BD23-0XB0 1
6ES7132-4FB01-0AB0 5
6ES7132-6FD00-0BB1 2
6ES7134-6GF00-0AA0 2
6ES7135-DA04-0AB0 1
6ES7151-1AB05-0AB0 4
6ES7151-1CA00-1BL0 2
6ES7193-4CE10-0AA0 1
6ES7193-4CF40-0AA0 1
6ES7193-4DL10-0AA0 2
6ES7193-4FL10-0AA0 5
6ES7193-6BN00-0NE0 2
6ES7215-1BH32-0XB0 1
6ES7291-8GF23-0XA0 2
6ES7513-1FL02-0BA0 2
6ES7635-2EC02-0AE3 1
6ES7952-1KK00-0AA0 2
6ES7953-8LG30-0AA0 3
6ES7972-0BA30-0XA0 35
6ES7350-2AH00-0AE0 1
6ES7505-0RB00-0AB0 1
PDR11-FBP.150 數(shù)量6個
Cp-C24/20.0 1
ACS880-01-142A-7+D150 1個
HV300-A04T00075GB 2
Siemens
1.型號:6GK5980-1CB10-0BA5 數(shù)量:1
2.型號:6GK1901-1BB50-0AA0 數(shù)量:1
6GK1571-0DF00-0AA0 1
6SL3220-1YE40-0AF0 1
6FC5247-0AF08-0AA1 4
脈沖分配器FiringBoard 代號2UAA137059R0001 2
20G11NC2P1JA0NNNNN 1 21190
20G11NC3P5JA0NNNNN 2 21190
BMEP582040S 1
6AG4132-2GB20-0AX6 1
6ES7223-1PH32-0XB0 1
6AU1400-2PA02-0AA0-Z Z=M44 1pcs
IZMX40N3 3P,2000A 1個
7MF0300-1QF21-5AM2-Z A00+E07+H01+T03+Y15 4
7MC7511-1JA01-0GA1 6
7NG0350-0BA01-0AM2 6
TM-E15S24-01 1
6SE6430-2AD31-1CA0 1
1SDA038340R1 1
1SDA057527R1 1
1SDA038306R1 1
702209/80 1
1SDA038302R1 1
1SDA038324R1 1
1SDA038312R1 1
ACS-AP-I3AUA0000088311 1
3BHE027786R0002 1
FEN-31 10522397 1
1SDA059070R1 1
ACS880-104-0530A-7+E205 1
ACS880-104-0410A-7+E205 1
E4H/E 3200 CB-3200ADC,E4,4P,1000VDC,65KA 1
FSO-12
1
HP 85027B and HP 85027D Directional Bridge. 10MHz to 26.5GHz and 10MHz to 47GHz
HP / Agilent 8447D Solid State Preamplifier, 100 kHz to 1.3 GHz - CALIBRATED!
FRESH CALIBRATION INCLUDED. GUARANTEED UNIT!
Agilent / HP 83731B Synthesized Signal Generator 1 - 20GHz
Agilent/HP 85027A Directional Bridge - 30 Day Warranty
HP / Agilent X752C Waveguide Directional Coupler 10DB
HP / Agilent 8594EM 9 kHz to 2.9 GHz EMC / Spectrum Analyzer - CALIBRATED!
FRESH CALIBRATION w/ Cert! Opts 041,103,130 Installed!
新刊登HP Agilent 8594E SPECTRUM ANALYZER 9 KHZ - 2.9 GHZ 004 130
Agilent / HP 8753D Option 006 30 kHz to 6 GHz Network Analyzer & Option 011
HP/Agilent E5071B ENA RF Network Analyzer, 300 kHz to 8.5 GHz
HP Agilent Keysight 5086-6917 Tacking Generator, 9 KHz - 2.9 GHz
Agilent HP 8702D 30kHz - 3GHz Optical Lightwave Component Analyzer - CALIBRATED!
FRESH CALIBRATION WITH CERTIFICATE INCLUDED!
Agilent 5087-7724 50GHz Coupler Assembly
Agilent / HP / Keysight 85024A High-Frequency Probe, 300 kHz to 3 GHz - 2 probes
HP - AGILENT 70902A 10Hz-300kHz IF SECTION PLUG IN.
@@@ CALIBRATED @@@ CALIBRATED @@@ CALIBRATED
Agilent / HP 8753C Network Analyzer, 300 kHz - 3 GHz
Agilent N3383A PNA Network Analyzer 300 kHz-9 GHz w/opt
HP Agilent Krytar 0955-0098 RF Directional Coupler Ref
HP Agilent 8648B RF Signal Generator 9 kHz 2 GHz +20 dBm Opt. 1EA VERY GOOD
Agilent 8482H Power Sensor 100khz-4.2Ghz, -10 to +35dbm
Keysight/Agilent/HP 8753ET Network Analyzer 300kHz-3GHz Opt: 004,8753ET,Analyzer
Agilent HP 8753ES Network Analyser 300KHz-6GHz Option 006
所在地: 英國
Agilent HP 773D 2-18GHz 20dB Directional Coupler
HP / Agilent 8562A 1 KHz to 22 GHz Portable Spectrum Analyzer w/ Color LCD!
FRESH CALIBRATION! Opt H51 (External Mixing) Installed!
HP Agilent E5100A Network Analyzer 10 kHz - 300 MHz
Agilent HP 8593E Spectrum Analyzer 9 kHz to 22 GHz w/ option 105 & 140
Agilent HP 0955-0148 Krytar 2616 1.7-20GHz Directional Coupler
Agilent / HP 54751A 20 GHz Dual Channel Electrical Module - CALIBRATED!
FRESH CALIBRATION WITH CERTIFICATE INCLUDED!
HP - AGILENT 8562A 40 GHz SPECTRUM ANALYZER W/ HP - AGILENT MEMORY MODULE!
@@@ NIST CALIBRATED @@@ NIST CALIBRATED @@@
Agilent / HP U2004A 9 KHz - 6 GHz (-60 to +20) dBm USB Power Sensor - CALIBRATED
FRESH CALIBRATION WITH CERTIFICATE INCLUDED!
HP/Agilent 8753D Network Analyzer, 30 kHz to 6 GHz opt 002, 006
Agilent / HP 85640A RF Tracking Generator, 300 kHz to 2.9 GHz 8560x/8561x/8562x
AGILENT HP 85027B DIRECTIONAL BRIDGE FOR NETWORK ANALYZER 10MHz to 26.5GHz
所在地: 法國
Agilent-HP-Keysight 436A -002-022- 100 kHz to 50 GHz Power Meter
Agilent HP 3585A Spectrum Analyser with Tracking Generator 20Hz-40MHz
AGILENT HP 8350A + 86290C SWEEP SIGNAL GENERATOR GENERATEUR 2 to 18.6GHz *st
HP Agilent 5343A 26.5 GHz Frequency Counter 2 Ch Frequenzimetro
AGILENT / HP 10086A ECL Terminator 523-0150
HP Agilent 8481A Power Sensor -30 +20dBm 10 MHz 18 GHz 437B EPM E4418B GOOD
AGILENT HP 53310A MODULATION DOMAIN ANALYZER opt.001+031 channel C 2.5GHz *st
HP 5342A 18 GHz microwave counter with level meter option (002)
AGILENT HP 8757A SCALAR NETWORK ANALYZER ANALYSEUR HF 10MHz to 100GHz *st
HP Agilent 8481A Power Sensor -30 +20dBm 10 MHz 18 GHz 437B EPM E4418B GOOD
HP Agilent 3325A synthesizer function generator
AGILENT HP 8757A SCALAR NETWORK ANALYZER ANALYSEUR HF 10MHz to 100GHz *st
NEW! TP-Link TL-ANT2412D 2.4GHz 12dBi Outdoor Omni-directional Antenna
HP Agilent 8481D Power Sensor -70 -20dBm 10 MHz 18 GHz per 437B EPM E4418B
AGILENT HP 16911A CARTE ANALYSEUR LOGIQUE CARD LOGIC ANALYZER 68ch 4GHZ 4M Mem
HP Procurve 14 dBi 5GHz Directional Antenna J9000A
AGILENT HP 435A POWER METER WATTMETRE HF 50GHz
HP Agilent E4412A ECP-E18A power sensor -70 +20dBm 10 MHz 18 GHz EPM E4418B
MGA-72543 AGILENT, PHEMT, Low Noise Amplifier, 0.1-6.0 GHz, 5 Stck
HP Agilent 8481D + 5848 Power Sensor -70 -20dBm 10 MHz 18 GHz 437B EPM E4418B
Amplificateur cascade Agilent - INA-10386 SOT-86, Qty.5
NEW! TP-Link TL-ANT2415D 2.4GHz 15dBi Outdoor Omni-directional Antenna
HP Agilent Hewlett-Packard 8763A Coaxial Switch
NEW C5087B HP YELLOW / MAGENTA PRINTHEAD PHOTOSMART C5087-67001 CM8050 8060
HP Agilent 53131A 3 GHz Frequenzimetro 3 Ch opt. 030 Frequency Counter 3 channel
HP Agilent Service Repair Owner Manuals –TV, Phone Camera etc PDF on 3x DVD
HP Agilent 53131A 3 GHz Frequenzimetro 3Ch opt. 030-010 Frequency Counter TESTED
AGILENT HP 436A POWER METER WATTMETRE HF 50GHz w/opt.022 GPIB - bouchon
HP Agilent 33120A Funzioni arbitrarie Waveb Generator 15MHz w/Cal Certificate
Agilent Réduction sonore pHEMT, NF = 0,5 dB, ATF-54143, Qty.5
Agilent HP 16047A Direct-Coupled Test Fixture
2.4GHz 8dBi Indoor Desktop Omni-directional Antenna
HP AGILENT KEYSIGHT 5350A - 20GHz MICROWAVE FREQUENCY COUNTER
Agilent HP 8494B with 8496B Manual Step Attenuator DC-18GHz 0-11dB
FMI 22132-20 Directional Coupler 26.4-40.1 GHz WR28
AGILENT HP 8657A + OPT.022 SIGNAL GENERATOR GENERATEUR GMSK MODULATOR 1GHz *st
HP agilent 70900B HP 70700A HP 714500 manuals
Agilent 0.5-6GHz +22dBm Drive Amp, MGA-83563 x 10
NouveauTektronix 2755 50 kHz to 21 GHz Spectrum Analyzer Programmable Benchtop
Coaxial directional coupler 3-way 20db (3.6-4.2 Ghz)
AGILENT HP 438A DUAL POWER METER WATTMETRE HF 50GHz
Agilent 8482A 100 KHz - 4.2 GHz power sensor sensore per bolometro RF meter
Marconi IFR Aeroflex 2031 AM-FM RF 10 kHz 2.7 GHz Digital Signal Generator
RIGOL DSA815 Analyseur de spectre + générateur suiveur 9 kHz 2 1.5GHz 135dBm EMI
HP Agilent 83522A RF plug-in Cassetto for 8350 A/B sweep oscillator 2.4 GHz GOOD
Advantest R3131 Spectrum Analyzer 9 kHz - 3 GHz EMC spettro AM-FM Demod
Marconi IFR Aeroflex 2031 generatore RF 10 kHz 2.7 GHz Digital Signal Generator
AGILENT HP 54503A OSCILLOSCOPE 4X500MHz *st
AGILENT HP 436A POWER METER WATTMETRE HF 50GHz w/opt.022 GPIB - bouchon - b M/A
2.4GHz 5dBi Indoor Desktop Omni-directional Antenna
Stange Strebe Stabilisator MEYLE 11160600003
Tektronix 492AP Spectrum Analyzer Programmable 50kHz - 21GHz
Evaluation of HP / Agilent VNA calibration kits for prospective purchasers.
HP ENVY dv7-7301es - BATTERIE ORDINATEUR PORTABLE
NANO-BRIDGE 5 GHZ AIRMAX 22DBI CON PARABOLA PoE - BRIDGE A OLTRE 20KM *offerta*
Agilent/HP 8745A & HP 8411A harmonic frequency converter
20 St. AT-30511. Agilent 2,4GHz NPN-Trans. SMD (E0002)
NouveauHP / Agilent 53131A - Universal Counter / Frequency Meter (+equ. opt 010, 030)
TP-Link 2.4GHz 9dBi Outdoor Directional Antenna Aerial
Rohde & Schwarz FSP7 Spectrum Analyser 9KHz-7GHz
Advantest R3131 Spectrum Analyzer 9 kHz - 3 GHz EMC spettro AM-FM Demod
HP ESG-3000A HF-Signalgenerator 250kHZ bis 3GHz sehr guter Zustand
Agilent 8762B Coaxial Switch, DC to 18 GHz, SPDT 3 ports.
6dBi 2.4GHz YAGI-DIRECTIONAL ANTENNA
HP ENVY dv7-7301es - BATTERIE ORDINATEUR PORTABLE
HP Agilent 83522A RF plug-in Cassetto for 8350 A/B sweep oscillator 2.4 GHz GOOD
TP-Link 2.4GHz Out Door 14dBi Directional Antenna
4 x MSA-0686 - Amplificateur Monolithique 2 GHz - AGILENT
HP ENVY dv6-7301sf - BATTERIE ORDINATEUR PORTABLE
VTO-8200 2-3Ghz VCO VTO Agilent Qty. 1 NEW
AGILENT HP 8651A RF OSCILLATOR GENERATEUR 7KHz to 70MHz *st
HP 776D DUAL DIRECTIONAL COAXIAL COUPLER 940 to 1900MHz * st
HP ENVY dv6-7301el - BATTERIE ORDINATEUR PORTABLE
HP ENVY dv6-7301es - BATTERIE ORDINATEUR PORTABLE
Dual Directional coupler HP776D 1GHz to 2GHz
PicoStation M2-HP - PicoM2-HP 2.4GHz Hi Power 802.11N (UBNT), Access Point
HP ENVY dv7-7301so - BATTERIE ORDINATEUR PORTABLE
HP ENVY dv6-7301eo - BATTERIE ORDINATEUR PORTABLE
9dBi 2.4GHz YAGI-DIRECTIONAL ANTENNA
AGILENT HP 3586C SELECTIVE LEVEL METER opt.004 W30 *st
HP ENVY dv6-7301ex - BATTERIE ORDINATEUR PORTABLE
HP ENVY dv6-7301ss - BATTERIE ORDINATEUR PORTABLE