Analog Signals; Analog And Other Input Signals - Bayer HealthCare RapidPoint 400 Series Service Manual

Analog Signals

Analog and Other Input Signals

Input Signal
GND_PLANE
PWR_RET
P24V
VCC
POWER5V
PAPER_OUT
HEAD_UP
PRN_TH_HI
TS_X+ and TS_X-
TS_Y+ and TS_Y-
Rev. C
Description
Ground reference signal for the electronics.
Ground reference signal for the power devices (such as,
printer, backlight, and inverter).
The +24 V supply voltage. This signal conforms to the
requirements outlined in the Digital Inputs Signals section
above.
Electronics 5 V power supply. This signal conforms to the
requirements outlined in the Digital Inputs Signals section
above.
Power device 5 V power supply. This signal conforms to the
requirements outlined in the Digital Inputs Signals section
above.
The signal that indicates that the printer is out of paper. It is
the open collector output of an optocoupler and requires a
100K ohms resistor pullup to the VCC line to operate. A
paper-out condition is indicated by a voltage of greater than
2.5 V on this line.
The signal from the mechanical switch that is internal to the
printer and that indicates the position of the print head. This
signal is pulled up to VCC through a 10K ohms resistor. A
voltage greater than 4.5 V indicates that the head is in the up
position, and a voltage less than 0.2 V indicates that the head
is in the down position.
The signal from the thermistor within the print head that
determines the temperature of the print head.
The two drive signals to the X axis on the touch screen. The
TS_X+ signal connects through a switch to the VCC line. The
TS_X- signal connects through a switch to ground.
The two drive signals to the Y axis on the touch screen.
Electronic System Overview 79