Sedecal SHF-310 - Page 74

HF Series Generators
Installation
IN-1052R0
40
Table 5-1 (cont.)
System Interconnection Signals
SIGNAL NAME SIGNAL DESCRIPTION
--FLD1 DR A low signal to select the right field in the Ion Chamber.
--FLD2 DR A low signal to select the left field in the Ion Chamber.
--FLD3 DR A low signal to select the center field in the Ion Chamber.
HT--C CLK Serial data clock from the HT Control Board. This clock synchronizes the HT--C DATA signal.
HT--C DAT Serial data from the HT Control Board. This data is synchronous with the HT--C CLK signal.
-- H T I N L
This signal is low when the switch in the high voltage transformer is in the RAD position. This is a safety interlock which
prevents an exposure if the high voltage switch (in the HV Transformer) is in the wrong position.
HV PT CRL
This analogic signal (originates in the optional AEC Control Board) controls the output of the HV Power Supply on theInterface
Control Board. +5 volts programs the output to be 0 volts, and 0 volts programs the output to approximately --1200 volts.
IC GND GNDfortheICSPLY.
IC1 INPUT This input is the output of the Bucky 1 Ion Chamber (normally the Table Ion Chamber).
IC2 INPUT This input is the output of the Bucky 2 Ion Chamber (normally the Vertical Bucky Stand Ion Chamber).
IC3 INPUT This input is the output of the Spot Film Ion Chamber.
IC SPLY Power supply for the Ion Chamber. This output should be within the range of 500 to 800 volts.
--LINE CONT A low signal energizes the main line contactor K5 in the Power Module.
--PREP
Commands to the HT Control Board to boost X-ray Tube Filament to the value of mA selected and to start the X-ray Tube Rotor
is RAD Tube is selected.
--READY
This low going signal indicates the system is ready to make an expos ure (Prepcycle complete). This signal is used to interface
to certain peripheral devices such as Film Changers, etc.
--ROOM LIGHT
This low going signal indicates the X-ray preparation or exposure. This signal is used to interface to the Room X-ray warning
light.
-- S T R T D R A low signal to indicate the start of an exposure to the Ion Chamber.
--THERMOSTAT-1 This signal from X-ray Tube indicates the overheat of the Tube-1.
--THERMOSTAT-2 This signal from X-ray Tube indicates the overheat of the Tube-2.