Operating Manual

Fredenstein Bento 10S Module Carrier
The Fredenstein Bento 10S is a high performance module carrier for Fredenstein Series 600
modules or API-500 compatible plug-in cards. The unit can accept a maximum of 6 modules.
The Bento 10S features several important upgrades compared with third party products:
Universal power supply: Mains voltages range from 90V AC to 240V AC, 50 to 60 Hz.
Increased output currents: +/-16V DC +/-3A and +48V DC 0.25A, 600mA per slot which is more
than double the standard calls for.
The Bento 10S power supply is also designed for extremely low noise largely due to state of the art
switching regulators that operate above 200 kHz, which is typically higher in frequency than most
conventional switching regulators. They also follow “green” guidelines that minimize power
consumption to only what is needed.
Other features include the capability to drive very large capacitive loads. Most other switching
supplies might oscillate if presented with large capacitors to charge. The Bento 10S ramps up in a
controlled manner (typically 0.2 seconds). Also unlike most +/- switching regulators, both the +16V
and -16V are regulated independently and provide separate over current protection.
Auxiliary Audio Inputs and Outputs
Built-in Audio Routing: Modules can be daisy-chained by simply flipping switches on the back-
panel.
Compressor buss linking: Compressor modules can be linked by engaging switches on the back-
panel as well.
Multi-Layer Backplane: Increased signal integrity and lower noise floor.
Ground-lift switch: In case of ground loops, the audio ground and the protective ground can be
disconnected. Please use only if absolutely necessary.
Installation:
Electrical Safety Warnings:
Do not open the enclosure, hazardous voltages are present inside!
There are no user serviceable parts inside.
Always disconnect the mains cord before installing or removing modules!
If you need to replace the mains fuse, make sure the replacement has the same
rating ( 3 AT).
Please disconnect the mains from your Bento 10S before installing or removing modules. Make
sure each installed module is well seated in the receiving connector and the module is secured by
fasten the two mounting screws.
Fredenstein Bento 10S Manual V1.0 Nov 18, 2016 Page 1