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Honeywell 621-3502 PLC Module

Honeywell 621-3502 PLC Module

Honeywell 621-3502 PLC Module

Brand: Honeywell

Module: 621-3502

Description: PLC Module

Product Orgin: USA

Honeywell 621-3502 PLC Module. Positive migration fault: When judging the measurement accuracy of the differential pressure transmitter in the positive migration state, the following two problems will be encountered: One is the instrument output error, if the installation of the normal order of operation, should first close the differential pressure transmitter three valve group of positive and negative pressure measurement, and then balance valve open and empty the instrument plug operation, 4mA limit value should be much higher than the instrument output value, if the instrument output value is greater than the limit value, then it indicates that the operating device there is a blockage phenomenon, The most likely location of failure is the three-valve group and the positive pressure chamber lead; Second, the migration or zero display is not normal, if the pressure point of the positive pressure chamber and the vent switch are closed and opened in turn, the instrument output should be displayed in the normal case of 4mA, then in the migration or zero are small, the instrument output value will be significantly lower than 4mA, on the contrary, if the instrument output value is greater than 4mA, At this time, the zero or migration amount will also increase, in addition, the spacer leakage or not filled will lead to the occurrence of spacer infiltration in the positive and negative pressure chamber.


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1756-OB32 330703-000-040-10-11-00 TC60102 KL4201X1-BA1
190e-and2-cb40c-ky-r 125388-01 TC20702 KJ3243X1-BB1
1746-P4 3500/45 176449-04 TC00402 KJ3002X1-BE1 12P0682X052
1768-L45S May-00 TC50402 KJ3001X1-BA1 12P0549X112
1756-CNBR 3500/42M T8173 KJ3001X1-BA1 129P549X152
1746-HT 3500/93 135785-01 T9193 VE4005S2B2 KJ3221X1-BA1 12P2531X092
1756-L1 128275-01 T9191 VE4002S1T2B5 KJ3204X1-BA1 12P3275X022
1783-BMS07SA 330190-080-01-00 T8232C CE4002S1T2B5 KJ3204X1-BA1 12P3275X022
1756-SYNCH 125840-02 TC32502 960177-02
1761-NET-AIC 330780-50-00 T8431C KJ4001X1-BA2 VE3051CO 12P1562X012
1794-TB3 3500/46M TC50102 KJ2101X1-BA 12P2690X012
1794-IT9 3500/91 TC30401 KJ4010X1-BF1 12P0831X072
1747-M13 3500/33 162291-01 T8086 PR6423/002-0030 CON021
1756-M02AE 330980-50-00 T8433C KJ3209X1-BA1 12P3905X012 VE4002S2T1B1
1756-OB16I 330910-05-10-02-00 T8830C KJ3001X1-BC1 12P0551X132 VE4001S3T1B1
1766-L32BXB 330780-90-00 TC20102 FX-490
1769-L33ER/A 3500/61 TC30602 KJ3001X1-BG1 12P0557X162
1756-OA8E 146031-01 TC31202 KJ4010X1-BG1 12P0830X062
1791-16A0 135489-02 T83127C KJ3222X1-BA1 12P2532X122 CE4003S2B1
1747-DCM 1900/65A TC32202 KJ3001X1-BC1
1756-PB72 3500/65-01-01 T8891C KJ3002X1-BA1 12P06801X122
1762-OA8 3500/42 138700-01 TC32402 12P3275X022 KJ3204X1-BA1
1794-IV16 330180-91-05 TC51002 KJ4001X1-BA2
1771-PS7 3500/50 133434-01 TC51702 KJ3221X1-BA1 12P2531X132 VE4035S2B1

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