6ES7 421-1BL01-0AA0

6ES7 421-1BL01-0AA0

6ES7 421-1BL01-0AA0

6ES7 421-1BL01-0AA0

数字量信号连接应注意的问题

变频器的输入信号中包括对运行/ 停止、正转/ 反转、点动等运行状态进行操作的数字量输入信号（开关型指令信号），这些信号常来自PLC 的数字量输出信号。PLC 通常利用其内部的继电器接点（继电器输出型P L C ）或具有开关特性的元器件（晶体管输出型PLC）与变频器相连，得到运行状态指令，如图1 和图2 所示。在进行数字量信号的连接时应注意：

（1）使用继电器输出型P L C 与变频器相连时，应注意接触不良常带来变频器误动作，因此在实际接线中要注意连接可靠。

（2）使用晶体管输出型P L C 与变频器相连时，应注意晶体管本身的电压的高低、电流的大小等限制条件在其范围内，保证系统的可靠性。

（3）设计变频器的输入信号电路时，应尽量避免采用继电器等感性负载，因继电器开闭产生的浪涌电流可能引起变频器的误动作。

（4）当P L C 输出的开关信号进入变频器时，有时会发生外部电源和变频器控制电源之间的串扰，应注意对P L C和变频器分开接地，避免两者使用共同的接地线。

中间继电器，HH54PW-CRL AC220V    50

MDLL3015N00AN0I   1

A20B-1007-0903数量2

D4NS-1AF   1

D4DS-K5  1

1769-IQ32  3个   面价4932

1769-OB32  2    面价6059

B25620-B1487-K101          30

EI100P38K-H6TR-1024.6CY100        15

刹车模块   120060410004       10

EMF2177IB.15.29    1

NA5-7W001S-V1是1

TSUBAKI PGS070L10E-M30S   1

欧姆龙，G9SA-301，DC24V，要8个

BCD码显示器 M7E-02DRN2 OMRON

限位 D4A-3101N OMRONO 10只

INDUTRON信号传输盒NIP25C DP  24VDC/0.2A    1

Q81BD-J61BT11  2

1387.001-2048   1

Q68DAIN    6 

AJ65SBTB1-32D    3

bko-ca2075   1

20G11NC085JA0NNNNN------------

E32-TC300  1

GHM510-2048-004

V23401-T2914-B209

富士触摸屏V808CD，要2

XH-D002 DC24V   1

E3S-CR66  11

SST-SR4-CLX-RLL   3-----------------

HMIGTO6310 1

PPBE0633   1-----------------

999821   3

4915-0821/NPT/EPF/TP/W  2

Burkert 6518   5

FTE20-AA13AE41  1 巴基斯坦

VTB180-2P41112  10

OBT200-18GM60-E5-V1  10 孟加拉

2862835 数量20

2878036 数量20

2861412 数量20

Lenovo ThinkPad X230 Laptop i5-3320M 4GB RAM 500G HDD W7P DVDRW 232036U

Lenovo ThinkPad X230 Laptop i5-3320M 4GB RAM 500G HDD W7P 12.5" W7P 232036F

Lenovo ThinkPad X230 Laptop i5-3320M 4GB RAM 500G HDD W7P 12.5" 343522U

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Lenovo ThinkPad X201 3113ED9 12.1" LED Tablet PC 

Lenovo ThinkPad W520 Laptop i7-2860QM 8GB RAM 500G HDD W7P DVDRW 15.6" 42763LU

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Lenovo ThinkPad W520 42763LU 15.6" LED Notebook Core i7 i7-2860QM 2.50GHz PN 

Lenovo ThinkPad W520 42763LU 15.6" LED i7-2860QM 2.50GHz 8GB 500GB Windows 7

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Lenovo ThinkPad W520 42763JU 15.6" LED Notebook Core i7 i7-2760QM 2.4GHz PN 4

Lenovo ThinkPad W520 42763JU 15.6" LED Notebook 500GB HDD 8GB RAM 10.8Hr Bat 

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Lenovo ThinkPad T530 Laptop i7-3520M 4GB RAM 500G HDD W7P 15.6" NVS 5400M DVDRW

Lenovo ThinkPad T530 Laptop i5-3320M 4GB RAM 500G HDD W7P DVDRW 239242U

Lenovo ThinkPad T530 Laptop i5-3320M 4GB RAM 500G HDD W7P DVDRW 15.6" 239245U NV

Lenovo ThinkPad T530 239245U 15.6" LED Notebook Core i5 i5-3320M 2.6GHz Blac

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Lenovo ThinkPad T530 239242U 15.6" i5-3320M 2.6GHz 4GB 500GB Windows 7 

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Lenovo ThinkPad T520 Laptop i5-2540M 4GB RAM 128G SSD W7P 15.6" DVDRW 424053U

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Lenovo ThinkPad T520 42395CF 15.6" LED Notebook 320GB HDD Bluetooth Webcam 7.7Hr

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Lenovo ThinkPad L520 Laptop i5-2520M 4GB 320G 786035U

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Lenovo ThinkPad L412 058542U 14" LED Notebook Core i5 i5-520M 2.4GHz Black 

Lenovo ThinkCentre M91P 7052 Desktop Intel i7 Quad Core 3.4GHz 4GB DDR3 1TB 

Lenovo ThinkCentre M81 7518D4U Desktop i3-2130 3.4GHz 4GB 320GB Windows 7 Black

Lenovo ThinkCentre M81 7518D4U Desktop i3-2130 3.4GHz 4GB 320GB Windows 7 Black

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Lenovo M91p 7052C9U Desktop PCi7-26004GB1TBHD2000W7Pro

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Lenovo 833214U 6 TB 2U Rack-mountable Secure Managed Client Network Storage

LEEDS  NORTHRUP 074429 NSPP 074429

Lavry 4496-12 2 Channel ADC  2 Channel DAC Converter

LATEST Revision R3.0 SuperMicro PDSME Bulk Pack MB FULL MFR 

LATEST Rev R2.01aSuperMicro H8DME-2 Bulk Pack MB FULL MFR 

LATEST Rev R2.01 SuperMicro H8DAR-T Bulk Pack MB FULL MFR 

LATEST Rev R1.1 SuperMicro X6DHR-IG2 Bulk Pack MB FULL MFR 

LATEST Rev R1.02 SuperMicro H8QMI-2 Bulk Pack MB FULL MFR 

LATEST Rev R1.01 SuperMicro X7DWU Motherboard FULL MFR 

LASER PARALLEL/USB HP P3005X WITH NETWORK DUPLEXER AND ADDITIONAL 500 Q7816A 

Landis A121836 I/O Module Base A120276  No Box

LANDIS  GYR 549-210 NSFP 549210

LANDIS  GYR 549-209 USPP 549209

L5201-2-02 SSD Analog I/O Module Diff Link L5201202 In Excellent Condition

Krauss Maffei TE500 Control Board TE-500 5089390 

Krauss Maffei SR501 Control Board SR-501 5089435 

Krauss Maffei DT100 AE1 LS Control Board DT-100 

KRAUSS MAFFEI CORP. 5088020 IO 502 CARD

Krauss Maffei 5080188 CPU Board MC2/MC3 

Koyo Direct Logic PLC Rack w/ CPU  Touchscreen 3498

Koyo Direct Logic 6 D0-06DD1 I/O Module DC Micro PLC 

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Korg Electribe ESX1SD with Built-in SD Card  

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KLOCKNER MOELLER EM4-101-AA2 USPP EM4101AA2

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