7
Controls and Indicators
Cooling Fans
30 TSQ Altis, Quantis, and Fortis Hardware Manual Thermo Scientific
Cooling Fans
Several fans, including those in the power supply subassemblies, provide internal cooling for
the MS. Cooling air enters through the three main air intake fans on the right side of the MS.
Exhaust air exits the instrument from the back ventilation slots.
The only user-serviceable part is the air filter in front of the air intake fans. For the
recommended maintenance schedule, see “Maintaining the Air Filter.”
Analog Input
The two analog channels connect to two separate 12-bit analog-to-digital converters (ADC)
for on-demand conversion of the input voltage.
1 Chassis Earth ground (for pins 3 and 4)
3, 4 2V Max:
+ (positive, pin 3) and
– (negative, pin 4)
Provides a connection for an external device, such as an
LC instrument.
Input: 0–2 Vdc (voltage clamps at 5 Vdc)
5 Chassis Earth ground (for pins 7 and 8)
7, 8 10V Max:
+ (positive, pin 7) and
– (negative, pin 8)
Provides a connection for an external device, such as an
LC instrument.
Input: 0–10 Vdc (voltage clamps at 15 Vdc)
Other connectors
– USB (2 ports) Provides a connection for the syringe pump and
divert/inject valve.
– Ethernet 1000 Base T Provides a connection for the Ethernet switch.
Table 3. Pin-out descriptions for the communication connectors (Sheet 2 of 2)
Pin Name Description
CAUTION To ensure safety and proper cooling, always operate the MS with its covers in
place. This is also necessary to comply with product safety and electromagnetic
interference regulations.
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