Redundant SS 823 in Parallel Configuration to increase total current
My control system has six SS 823 voter Units (VU) and six SD 834 24VDC 20A Power Supplies Units (PSU).
PSU1, PSU2, VU1 and VU2 are wired to each other for redundant Configuration.
PSU3, PSU4, VU3 and VU4 are wired to each other for redundant Configuration.
PSU5, PSU6, VU5 and VU6 are wired to each other for redundant Configuration.
Power requirement is more than 40A so i want to wire all redundant configurations in parallel to increase the current up to 60A. Picture is attached for reference. Please guide me if my understanding is correct.
PSU1, PSU2, VU1 and VU2 are wired to each other for redundant Configuration.
PSU3, PSU4, VU3 and VU4 are wired to each other for redundant Configuration.
PSU5, PSU6, VU5 and VU6 are wired to each other for redundant Configuration.
Power requirement is more than 40A so i want to wire all redundant configurations in parallel to increase the current up to 60A. Picture is attached for reference. Please guide me if my understanding is correct.
Asked 2 years ago
Answers
0
Hi,
I think that is not possible. Voting units has diodes inside, in order to connect and separate two power supplies modules to it's input and then the load to the output. But it is not allowed to connect in parallel two voting inputs in order to increase the output current.
Look for example page 186 of 3BSE020923R4101:
I think that is not possible. Voting units has diodes inside, in order to connect and separate two power supplies modules to it's input and then the load to the output. But it is not allowed to connect in parallel two voting inputs in order to increase the output current.
Look for example page 186 of 3BSE020923R4101:
Two SS823 can never be configured in parallel to achieve more current.
I could recommend for over than 40A to look for suitable power supply modules or pair of it, which allow parallel operation. I don't think it is possible with a standard SD power supplies.
Source: 3BSE020923R4101
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