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Technical Description: Inlet
Solenoid Inlet
Valve Drives
Manifold Heater
Micro Capillary Block
Flow Sensor
Digital Inputs
C-32
Prima PRO & Sentinel PRO Mass Spectrometers User Guide
F3: 4 A (24 Vdc, all other functions). Supply OK indicated by
green LED D19.
A watchdog function is used to show that the processor is active (red
LED D6).
There are 24 outputs, individually addressable with up to 4 switched
on at any one time (limited in software). Each is designed to deliver
up to 300 mA at 24 Vdc and is intended to drive a single gas control
solenoid valve. For the six-way inlet version, when a sample inlet is
selected the controller will energize the specific inlet valve as well as
the selector valve.
Mains power is connected to J18 along with the heaters and over-
temperature thermal switch. This allows 115 Vac or 230 Vac
operation to be selected by means of a switch on the PCB.
Unplugging J18 or switching off the Inlet circuit breaker in the main
enclosure will remove mains power from the PCB.
Warning! Removal of F1 will only break the L/L1 line. Power
might still be on the assembly from the N/L2 line.
The heater block thermocouple connects to J13. Power to the heater
is switched via a solid state relay on the PCB, giving a control
precision of ±1°C, accuracy ±3°C. A red LED (D25, adjacent to the
solid state relay) flashes when the heater is driven on (if the heater is
not driven on at all, i.e. the temperature is above the set point, the
LED alone is driven on for 10 ms every second).
The micro capillary block PRT connects to J15 and the heater output
Heater
(24 Vdc) to J16. Control precision is ±1°C, accuracy ±3°C. A red
LED (D24) flashes when the sample tube heater is driven on.
Connect the flow sensor to J17.
Four opto-isolated digital inputs are available (J5, J6, J9, J10). They
can be configured as requiring 24 Vdc or voltage free contact input
by means of jumpers on the PCB. A red LED adjacent to each
connector indicates the status of the input.
Thermo Fisher Scientific
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