5/23/2017 11:13 AM | |
Joined: 9/15/2015 Last visit: 10/18/2024 Posts: 67 Rating: (6) |
Attachment for typical wiring with AS-i separately. |
5/23/2017 11:50 AM | |
Joined: 5/17/2010 Last visit: 5/22/2024 Posts: 226 Rating: (28) |
Hello tungpt3149, At latest catalog IC10 2017 at page 2/80 you will find the note "Not suitable for AS-i Power24V". http://www.siemens.com/ic10 -> chapter 2 As I know this is caused by the internal mechanism of ground-fault detection which will not work properly in case of 24V (also tolerance of voltage have to get observed). If you build an AS-i System on 24V (limited to 50meters!) why not using decoupling module like 3RK1901-1DE12-1AA0 which already includes ground-fault detection? A decoupling module is a must in case of using Standard 24V supply (ok, other brands (not Siemens) have this data decoupling integrated to their AS-i master). With best regards Michael |
Last edited by: Mr. SIRIUS at: 5/23/2017 11:51:01 AM------------------------------------------------------------------------------------------------ |
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4/18/2018 4:45 AM | |
Joined: 9/15/2015 Last visit: 10/18/2024 Posts: 67 Rating: (6) |
Hi experts, Why do you mention "limited to 50m"? Which document shows that information? Actually, I built an AS-i system on 24V, then tried to test ground fault detection function by connection AS-i "-" or M to PE, but the module does not work. When I try to long press the test button, the module changes the status correctly. Please advice me, when this ground fault detection works and how... Any comments is highly appreciated. Thanks in advance. |
4/18/2018 6:17 AM | |
Joined: 9/15/2015 Last visit: 10/18/2024 Posts: 67 Rating: (6) |
I found a manual, that shows 50m limited, and it says that "Ground-fault detection The integrated ground-fault detection works with a grounded and non-grounded supply: The connection of negative pole and ground (upstream from the data decoupling module) customary with 24 V DC power supplies is permitted. A ground fault to the negative or positive pole on the AS-Interface network (down-stream from the data decoupling module) is detected and stored as a fault and will be signaled using LEDs and a relay contact." But when I connect AS-i "-" and PE, nothing happens. :( I tried some modules in other cabinets, but it does not work neither. Attachment0. ground fault module decoupling siemens.pdf (386 Downloads) |
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