ToolMod Faderbox
modular Summing Mixer
13
adt-audio
®
®
Power Supply
tion to a higher failure probability of the connectors, higher current results in
higher voltage drop along the cable and therefore a lower supply voltage of the
modules. This may result in a reduction of the headroom and degraded transi-
ent performance.
To make sure that the maximum current will not exceed 3 amps with a rea-
sonable safety margin, connect not more than a single 4U high frame, two
2U high frames, or four 1U-high frames to a single power supply output.
Of course this is only a rule of thumb. The exact current consumption results
from the addition of the current consumption of the modules, and the load re-
sistance combined with the operation level, as explained in detail above.
Grounding and Protective Ground
As factory standard, the protective ground from the Euro inlet of the power sup-
ply unit is connected via the power supply cable to the chassis of the frame, the
audio ground, and the screen pins of all connectors. This principle ensures that
all accessible parts are connected to the protective ground. However, the con-
nections between the different grounds are not part of the basic design of the
ToolMod Faderbox series. The three ground circuits protective ground = chas-
sis, audio ground = 0 volts of the power supply, and screen-ground = all scree-
ning pins of the audio connectors, are fully isolated from each other and con-
nected only at one point inside each frame. If ground loops show up due to the
connection of the protective ground to the audio ground and/or screen ground,
it is possible to isolate the ground circuits. For safety reasons, it is not possible
to isolate the protective ground from the chassis. In any case it is necessary to
ensure that the safety of the system is ensured if the ground connections are
removed.
Contact us before you change anything!
IMPORTANT HINT:
Do not power on the system before the power cables are installed!
If you unplug or plug in a power cable while the system is under power by ac-
cident, there is no risk that a module or the power supply unit becomes defec-
tive. If the load on the power supply unit is low, the system will keep working.
However, if the load of the power supply unit is high, the inrush current when
you plug in a power cable is very high, since the oversized load capacitors in all
modules have to be loaded. In this case it might happen that one of the protec-
tion circuits in the power supply unit is triggered and shuts down one or both
audio supply voltages. This results in very high background noise and a redu-
ced intensity of the control LED of the particular supply voltage on the face-
plate of the power supply unit. If this happens, switch off, wait about 1 minu-
te, and switch on again.
Summary of Contents for ToolMod Faderbox
Page 32: ...adt audio ToolMod Faderbox modular Summing Mixer 32 adt audio Audio Connectors ...
Page 47: ... ToolMod Faderbox modular Summing Mixer 47 adt audio adt audio Mono Input Module TM601 ...
Page 49: ... ToolMod Faderbox modular Summing Mixer 49 adt audio adt audio Stereo Input Module TM602 ...
Page 51: ... ToolMod Faderbox modular Summing Mixer 51 adt audio adt audio MS Stereo Input Module TM603 ...
Page 53: ... ToolMod Faderbox modular Summing Mixer 53 adt audio adt audio Control Room Module TM612 ...
