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Other Considerations
TEMPEST Support
TEMPEST is a US Government specification and NATO certification intended to protect valuable and mission
critical information from being intercepted through leaking emanations, including unintentional radio or
electrical signals, sounds, and vibrations. The protection efforts are also known as emission security (EMSEC),
which is a subset of communications security (COMSEC).
Several FiberPlex Technologies FOI units have a variant designated with a 'T‐ST' suffix, which has been
rigorously designed and tested to comply with TEMPEST requirements. These units can easily be visually
identified by their silver finish.
An RFI suppressed version of the PSQ‐4909 AC power supplies have been tested with the TEMPEST FOI units
and should be used with those units as part of a complete, certified TEMPEST solution. This version can be
ordered using an 'R' suffix after the model number (PSQ‐4909‐R).
When using TEMPEST rated FOI, much care must be taken in both the mating equipment and especially the
copper cabling used in such connection. In addition, the power supplies and/or chassis being uses must have
an 'R' suffix. For standalone applications, use a PSQ‐4909‐R (or the older PSQ‐4910‐R) power supply or for a
chassis mounted solution use either an RMC‐3101‐R or RMC‐2101‐R chassis. All the items in the system must
be TEMPEST compliant for the system to properly protect the information.
Specifications
ELECTRICAL SPECIFICATIONS
Power Requirement
PSQ‐x909 AC Supplies
Power Requirement
PSQ‐x920 Low Voltage
Supplies
Environmental
Power Connector
PHYSICAL SPECIFICATIONS
Case Dimensions
PSQ‐2909
PSQ‐3909
PSQ‐4909
PSQ‐2920
PSQ‐3920
PSQ‐4920
Input Voltage
Input Frequency
Output Voltage
Supply Current
Output Power
Input DC Voltage
Input AC Voltage (50‐60 Hz)
Output Voltage
Supply Current
Output Power
Storage Temperature
Operating Temperature
PSQ‐x909
PSQ‐x920
FOI Size
Length
2
2.25 in (57mm)
3
2.38 in (60 mm)
4
2.25 in (57mm)
2
2.25 in (57mm)
3
2.38 in (60 mm)
4
2.25 in (57mm)
Min
Typ
100
‐
50
‐
‐
9
‐
1000
‐
9
12
‐
10
‐
‐
9
‐
1000
‐
9
‐40
‐
0
‐
NEMA 5‐15P, Permanently Affixed
Phoenix Contact 1827716
Width
2.56 in (65 mm)
3.19 in (81mm)
2.56 in (65 mm)
2.56 in (65 mm)
3.19 in (81mm)
2.56 in (65 mm)
Max
240
60
‐
‐
‐
48
32
‐
‐
3
85
50
Height
1.31 in (33 mm)
0.8 lb (0.4 kg)
1.45 in (37 mm)
0.8 lb (0.4 kg)
1.45 in (37 mm)
0.8 lb (0.4 kg)
1.31 in (33 mm)
0.8 lb (0.4 kg)
1.45 in (37 mm)
0.8 lb (0.4 kg)
1.45 in (37 mm)
0.8 lb (0.4 kg)
Unit
VAC
Hz
VDC
mA
W
VDC
VAC
VDC
mA
W
°C
°C
Weight
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