1746-P1

详细内容：1746-P1 输入电路是PLC接受开关量、模拟量等输入信号的端口，其元器件质量的优劣、接线方式及是否牢靠也是影响控制系统可靠性的重要因素。以开关量输入为例，按钮、行程开关的触点接触要保持在良好状态，接线要牢固可靠。机械限位开关是容易产生故障的元件，设计时，应尽量选用可靠性高的接近开关代替机械限位开关。此外，按钮触点的选择也影响到系统的可靠性。在设计电路时，应尽量选用可靠性高的元器件，对于模拟量输入信号来说，常用的有4～20mA、0～20mA直流电流信号；0～5V、0～10V直流电压信号，电源为直流24V. 　　对于开关量输出来说，PLC的输出有继电器输出、晶闸管输出、晶体管输出三种形式，具体选择哪种形式的输出应根据负载要求来决定，选择不当会使系统可靠性降低，严重时导致系统不能正常工作。如晶闸管输出只能用于交流负载，晶体管输出只能用于直流负载。此外，PLC的输出端子带负载能力是有限的，如果超过了规定的最大限值，必须外接继电器或接触器，才能正常工作。外接继电器、接触器、电磁阀等执行元件的质量，是影响系统可靠性的重要因素。常见的故障有线圈短路、机械故障造成触点不动或接触不良。这一方面可以通过选用高质量的元器件来提高可靠性，另一方面，在对系统可靠性及智能化要求较高的场合，可以根据电路中电流异常的情况对输出单元的一些重点部位进行诊断，当检测到异常信号时，系统按程序自动转入故障处理，从而提高系统工作的可靠性。若PLC输出端子接有感性元件，则应采取相应的保护措施，以保护PLC的输出触点。 Honeywell CN210SP Honeywell RM7895A-1048 Burner Control 120V 50/60Hz ! WOW ! HONEYWELL DC200C-2-000-1​00000-0 NSPP DC200C20001000​00 IN BOX TDI HONEYWELL CONTROL BOARD WHC1502-CNT-00 377A0051 V1.79 HONEYWELL DC001NDR5 FNFP DC001NDR5 HONEYWELL V4055A 1296 3 FLUID POWER GAS VALVE, NEW HONEYWELL TRULINE 12" CIRCULAR CHART RECORDER - MODEL DR450T HONEYWELL 621-0010 OUTPUT MODULE 6210010 ★New Honeywell HBB-200HD 16GB Vehicle Car Black Box Drive Recorder HONEYWELL R7253A1014 - 3 Sec FLAME-RECT.RES​PONSE AMP HONEYWELL 14507287-001 USPP 14507287001 HONEYWELL DC2001-0-000-1​00000-0 NSFP DC200100001000​00 HONEYWELL 46190314-001 USPP 46190314001 HONEYWELL 51402577-001 USPP 51402577001 HONEYWELL M904E-75DS8 USPP M904E75DS8 HONEYWELL M904F-30DS6 USPP M904F30DS6 HONEYWELL R7350A-1321-1 USPP R7350A13211 Honeywell Analytics Lifeline Duct Moutning Adapter Kit 1283-1047 lot of 23 new HONEYWELL 30754683-004 NSFP 30754683004 HONEYWELL M4TVIS-4 NSFP M4TVIS4 NEW 15x Honeywell L3000LB-R LYNX Plus Wireless Self-Contained Security Control HONEYWELL CONTROLLER, UDC2000 Honeywell S8600F HONEYWELL 900R04-0001 NSPP 900R040001 HONEYWELL PVL40-22AS USPP PVL4022AS HONEYWELL W7752G-2000 USPP W7752G2000 honeywell modutrol IV motor m9185d 1004 HONEYWELL UDC3300 *NIB* Honeywell Ademco 6280W White Touch Screen Keypad Honeywell Ademco 6280S Silver Touch Screen Keypad HONEYWELL R4150L-1060-3 USPP R4150L10603 HONEYWELL R7352C-12752 USPP R7352C12752 HONEYWELL R4140L1162 USPP R4140L1162 HONEYWELL 23H8086ECD5870​5W TARGET, TI-NIOBIUM HONEYWELL TSENWXBIM-0801​8 TARGET, 5NW SBLgTarg 15.620X12.846X​0.250In HONEYWELL M9184F-1000 NSPP M9184F1000 HONEYWELL T921A-1911 NSFP T921A1911 620-1690C, HONEYWELL PROCESSOR RACK FOR SERIES 9000 Honeywell 22016 (Pack of 10) Ssec Terminal Block - Honeywell Ademco Vista 21iP With (1)6150 and (1)6150RF Keypad Receiver Ver 3.13 HONEYWELL 511-4575 USPP 5114575 HONEYWELL M6284A-1022 USPP M6284A1022 HONEYWELL R7425B1023 USPP R7425B1023 HONEYWELL 14501676-002 USPP 14501676002 HONEYWELL 14503168-001 USPP 14503168001 HONEYWELL DC300K-0-203-1​1-0000-0 USPP DC300K02031100​00 HONEYWELL H205A-1061 NSPP H205A1061 HONEYWELL AV712CB124 NSFP AV712CB124 HONEYWELL UDC230B-CE0A-1​0-00000 USPP UDC230BCE0A100​00 Honeywell C7007A 1001 C7007A1001 Flame Rod Holder HONEYWELL R4155A-1002-1 USPP R4155A10021 Honeywell R4228D 1041 (Pack of 6) R4228D1041 General Purpose Relay HONEYWELL C7007A-1001 NSPP C7007A1001 HONEYWELL M965A1031 USPP M965A1031 HONEYWELL 235353 NSFP 235353 HONEYWELL M6284F-1013 NSPP M6284F1013 HONEYWELL V400A-1095 NSFP V400A1095 HONEYWELL ML4115H1002 120V SPRING RETURN DIRECT COUPLED ACTUATOR ON/OFF DAMPER NEW Honeywell 30731808-001 Regulator Card PLC Board 30731808001 Honey Well Honeywell RM7895-A-1014 Burner Control RM7895 A1014 Honeywell C-14A Directional Gyro P/n 2587193-43 HONEYWELL 30750990-001 KEYBOARD INTERFACE 30750990001 HONEYWELL RA890-F-1288 CONTROLLER RA890F1288 HONEYWELL ANALYTICS DISTRIBUTION GAS MONITOR Honeywell MICRO SWITCH 112FW312-R1 Proximity switch Sensor aviation TESTED HHP Honeywell 9500-41A-C30 Dolphin Mobile Barcode Scanner Pocket PC GSM HONEYWELL HI AND LOW LIMIT CONTROLLER AV541AB101 *NEW* HONEYWELL BOARD 400251-1-A HONEYWELL XC5010B2 CPU MODULE Honeywell Control Transmitter W/Flange Diaphragm Sensor Honeywell Microswitch FE-MLS 5EB Honeywell Control Processor Catalog# 620-1200! Honeywell V400 A 1095 V400A1095 single Valve standing Honeywell FS90 Control Board 14505128-001 HONEYWELL 4DP7APXDH-111 BOARD 4DP7APXDH111 HONEYWELL M6184D1001 *NEW* Honeywell JEC 060-H033-01 Long Stroke Linear Transducer Honeywell UDC3000 Controller