- Add 1 power supply of the same type to achive n+1 redundancy when using the frames RM420-061, RM420-063, RM420-081!
Multiply the necessary number of power supplys by 2 when using dual mains power inlet frames RM420-064, RM420-062, RM420-086 to achive full n+n redundancy!

- What is the difference between RM420-084 and RM420-082?
The major difference is the Wide AC Voltage Input Range and the Active Power Factor Correction of the new RM420-084 compared to the old RM420-082. The output power is the same, 75W.

- What is the difference between RM420-083 and RM420-085?
The major difference is the Wide AC Voltage Input Range and the Active Power Factor Correction of the new RM420-083 compared to the old RM420-085. The output power is the same, 75W.

- What is Wide AC Voltage Input Range?
The old power supplys RM420-082/RM420-085 have a input range between 200VAC and 250VAC, the new types RM420-084/RM420-083 have a input range between 94VAC and 253VAC. The input voltage differs in the different countrys of the world.

- What is Power Factor Correction or PFC?
In old fashioned switching power supplys like the RM420-082 and RM420-085 the current consumption is not sinosodial, this may disturb the whole power distribution network. The power factor correction, PFC, is also necessary to comply with the EN61000-3-2.

- Is it possible to mix old RM420-085 and new RM420-083 within one DSP Frame?
NO! Please don't try it! They use the same connector but the Load Share Signal is not compatible between the RM420-085 and the RM420-083.

- Is it possible to mix old RM420-082 and new RM420-084 within one DSP Frame or Power Supply Frame?
NO! Please don't try it! They use the same connector but the Load Share Signal is not compatible between the RM420-082 and the RM420-084.

- Is it possible to use for example 2 pieces RM420-085 (old 5V) and 2 pieces RM420-084 (new 24V) within one DSP Frame?
Yes, that's possible because the 24V and the 5V power supplys work completely independent.

- Is it possible to use for example 2 pieces RM420-083 (new 5V) and 2 pieces RM420-082 (old 24V) within one DSP Frame?
Yes, that's possible because the 24V and the 5V power supplys work completely independent.