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RTD Wiring question

Created by: Lucky123 at: 7/16/2009 5:35 PM (1 Replies)

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7/16/2009 5:35 PM

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Lucky123

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Joined: 12/20/2008

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Hello Forum Members,

Please note that I am using below hardware:

6ES7-331-1KF01-0AB0		8-pt Analog Input
6ES7-332-5HD01-0AB0		4-pt Analog Output
6ES7-331-7PF01-0AB0		8-pt RTD Input
6ES7-341-1CH01-0AE0		CP341 Communication Processor, RS-485/422

My Question is mentioned below:

1. For Analog Input how much K Ohm resistance I would need to use for the spare(unused) channels in order to avoid SF.(is 4.7K is appropriate?)

2. For Analog Out how much ohm resistance I would need to use for the spare(unused) channels in order to Avoid SF. (is 250 ohm Appropriate?)

3. For RTD Input How much Ohm Resistance I need to use for the spare(unused) channels in order to Avoid SF. (is 100 ohm appropriate?)

4. Will I recieve the male/female connector with CP341 Module?

Additionally my question is in case of Digital input Module (6ES7-321-1BH02-0AA0) & Analog/RTD input as mentioned aboveI don't need to provide the 24 VDC external power to the module.

where as in case of Digital out put and analog output I would need external 24VDc power for the module.

Please confirm

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7/16/2009 7:03 PM	Rate (1)
H-H Platinum Member Joined: 7/2/2008 Last visit: 11/27/2023 Posts: 928 Rating: (304)	Hello Lalit, It'srecommends to short circuit unused analog channels and deactivate them in HW configuration Check this thread. I assume you are using analog inputs and outputs of 4-20mA. 1- For the 331-1KF01 module, Resistance will not do alone because thismodule is most likely used as analog input for active 4 wire transducers. So, it's not a matter of resistance and it's a matter of current source. One solution is to use external power supply and appropriate resistance considering card impedance for current measurement as zero. The connection should be as shown in page 272 (for 2DMU)in S7-300 Module data manual (I think you already have it) So let's say your desired current is 6 mA then your resistance should be = 24VDC/6mA = 4 K Ohm. 2- For the 332-5HD01 module, Yes, 250 Ohm will be good. 3- For RTD 100 Ohm means zero degree. It will work. 4- For CP341, I don't think you will receive it with bus connector. quote user="lalit"] Additionally my question is in case of Digital input Module (6ES7-321-1BH02-0AA0) & Analog/RTD input as mentioned aboveI don't need to provide the 24 VDC external power to the module. where as in case of Digital out put and analog output I would need external 24VDc power for the module. Please confirm Thanks Ok the digital input module and analog input module (331-1KF01) do not need external power supply. The RTD module 331-7PF01 requires 24VDC at pins 21 & 40. Best regards. H-H
	Last edited by: H-H at: 7/16/2009 7:05 PM
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Created by: Lucky123 at: 7/16/2009 5:35 PM (1 Replies)

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Last edited by: H-H at: 7/16/2009 7:05 PM

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