ADDAC System ADDAC200RM Voltage Monitoring System [PRE-ORDER]

The ADDAC200 Rails Monitor offers a simple and straightforward way for users to monitor the voltage of their systems. The new Rails Monitor features a 0.1% precision analog voltage meter that shows the status of both the +12V and -12V rail. Monitoring is important, because running a PSU too close to its limits can cause more stress to the PSU. It is good practice is to use approximately 75% of the PSU maximum ratings, and this can extend the overall PSU life.

Identify PSU voltage drops
Very often, PSUs will exhibit a small voltage drop as current increases — particularly when systems are pushed closed to their limits. Heat can also influence this drop, since heat is related to the current drawn. As more current is being drawn, more heat is likely to build up on the PSU — and extreme heat conditions are liable to reduce the maximum amount of current that can be delivered by the PSU.

While a consumption drop in current is somewhat stable and immediate, voltage drops from heat buildup can take more time to occur until it stabilizes — and only if it has the necessary “headroom” to stabilize. If the heat is not effectively dissipated, then the voltage drop will likely continue until it reaches a balance point which can be several volts below the common 12V reference. At this point, a PSU would be under great stress and the heat generated can have a lasting negative impact on a system. This is is why it is important to keep the PSU load at a sensible level, and the ADDAC200 Rails Monitor can help in achieving this.

PSU impact on modules
Some Eurorack modules are more susceptible to PSU changes than others. Modules that feature internal regulators will be less susceptible to swings in PSU voltage, and modules that use internal +5v, ±9v, ±10v regulators will have more tolerance in most cases. Also, modules that use voltage reverse protection will already have a 0.3v to 0.8v drop inherent to the protection circuit.

While many digital modules can withstand lower voltages, others may be more dependent on the reference voltage and may exhibit strange behaviors. The ADDAC200 Rails Monitor module can help preventing all these situations. It has not been designed to fix any problem, but will provide day to day monitoring of your system to help keep your PSU in healthy conditions.

• Width: 4HP
• Depth: 35mm
• Power: 60mA @ +12V / 60mA @ -12V