3-8
764332-898
should the primary microprocessor system become
inoperative.
The master computer is located on the table column, while
the slave computer is located in the hand control.
Communication between the two is through a coiled cord
(RS232 format). The master computer selects which
outputs are to be actuated based on inputs from the hand
control, foot control (optional) and table sensors. An Intel
8032 microcontroller is the heart of the master computer,
with software stored on a 27C256 EPROM. Solenoid
outputs are generated through an 8255, buffered with
open-collector drivers. A watchdog timer and
appropriate software monitor input/output signals to
ensure graceful (instant) recovery should the I/O ports
become configured in an erroneous state. Current sensors
prevent the solenoids from being turned on by improper
signals. Input isolation is also provided for the seat, raise,
column and floor-lock limit switches. Input comparators
indicate low-battery conditions, first through an LED on
the hand control and, more specifically, on LEDs located
on the table-control PC board mounted under the shroud.
The slave computer provides user inputs (from touch-pad
switches) to the master computer. It also receives
feedback signals and turns on the proper status LEDs. An
Intel 80C31 microcontroller is the heart of the slave
computer with software stored on a 27C256 EPROM. The
LED buffer inputs and touchpad matrix strobe inputs are
generated through an 8255. Like the master computer, a
hardware watchdog timer and software routines ensure
correct I/O port status. The use of microprocessors allows
for complex control functions to be implemented with
minimum hardware and through the use of a small,
lightweight pendant control.
Simple yet reliable backup is provided by a secondary
and separate override system which allows operation of
basic table functions should the primary microprocessor
system become inoperative. The override control
assembly uses different and basic technology. It turns off
microprocessor controls when actuated by opening all
driver lines and actuating the function selected at the
override switch PC board. It bypasses the solenoid power
cut-back circuit and turns the pump motor and solenoids
fully on.
Input lines are fused and include a line filter and transient
protection. On older tables, the motor battery charger on
battery equipped tables had an input voltage-selector
switch (SW2) which allowed for table operation on 100,
120, 220 or 230/240 Vac, 50/60 Hz. On newer tables, the
motor battery charger on battery equipped tables has an
auto-select feature for the input voltage and so has no
selector switch or jumpers. A battery-powered table
includes a 24-Vdc, 24-AH rated battery for the pump
motor. An integral battery charger requires 24 hours for
90% battery charge, 36 hours for 95%, and 48 hours for
100% charge. A minimum of 36 hours is recommended.
The input voltage selector switch on the new (IPX4) power
supply assembly was removed. Input voltage selection is
made using jumpers provided by the factory pre-
configured for 120 Vac. Pre-IPX4 tables continue to use
the same power supply which includes the two input
voltage selector switches.
Important:
The jumpers must be re-configured for use
at other input voltages.
3.4.2 Principles of Operation
3.4.2.1 Incoming Power
A line cord, fused in the table at F1 and F2 (6 amp at
120 Vdc, 4 amp at 240 Vac) feeds 120 Vdc (domestic units)
to the line filter. The line filter supplies line voltage to the
power transformer and each of two battery chargers (one
charger if a line-powered table). Each charger is fused and
the rating is based on line voltage.
3.4.2.2 Power Control Assembly
This module is located in the table base and contains the
control battery charger and the power-control PC board.
This circuit board monitors and controls the following:
• Battery and battery chargers
• Actuation and protection of the hydraulic pump
and solenoid
• Power-up and line-cord operation relays
• Power cut-back circuitry
• AC signal indicator for the line-cord LED on the
hand control.
Jumpers on the circuit board identify whether it is battery
or line-cord (electric) type.
The battery charger(s) supply 24 Vdc to the control and
to the motor batteries, provided the line cord is plugged
in. Line-cord power is the primary power for battery
tables. Battery voltage is monitored by the table control,
through the hand control on power-up, and every
10 minutes thereafter. The table control sends a “charger
off” signal to the power-control PC board to isolate the
chargers and batteries, then monitors the battery voltage.
If low voltage is sensed, the table control sends a low-
battery signal to the low-battery LED on the hand control,
as well as to the low-battery LED on the table control PC
board.
Control power-up/power-down is generated on the
power-control PC board via direct signals from the hand-
control ON/OFF touch pads. These signals activate a
latch relay on the power-control PC board which transfers
the 24 Vdc signal to the table control PC board. This latch
relay CR3, which is multipoled, also isolates the batteries
Содержание Amsco 3085 SP
Страница 1: ...MAINTENANCE MANUAL Amsco 3085 SP Surgical Table After S N B420702 025 10 07 10 P764332 897 ...
Страница 3: ...OPERATOR MANUAL Amsco 3085 SP Surgical Table 08 10 11 P150830 353 ...
Страница 56: ......
Страница 132: ......
Страница 155: ...18 764332 899 Figure 5 AC Plate Assembly 1 7 3 4 5 6 2 9 10 P17 ...
Страница 161: ...24 764332 899 Figure 8 Column Assembly 1 2 3 4 5 6 7 8 9 ...
Страница 174: ...38 764332 899 Figure 14 Seat Section Assembly LS6 LS7 19 4 13 12 16 2 14 3 11 4 5 9 10 6 7 8 15 1 18 17 ...
Страница 176: ...40 764332 899 Figure 15 Leg Section Assemblies 1 7 2 4 3 5 6 ...
Страница 191: ...56 764332 899 Figure 21 Hydraulic Components Layout Leg Section Seat Section Back Section 12 8 6 5 4 1 2 3 4 7 9 11 10 ...
Страница 197: ...62 764332 899 Figure 24 Motor and Pump Assembly FC FR 11 12 13 2 3 4 6 5 20 18 15 21 17 1 8 7 14 19 15 10 9 ...
Страница 199: ...64 764332 899 Figure 25 Valve Box IV 2 7 7 6 1 1 1 1 10 3 5 3 1 1 8 9 8 9 11 4 3 12 12 1 11 1 2 1 3 1 4 2 FC FR ...
Страница 204: ......
Страница 205: ......
Страница 206: ......
Страница 207: ......
Страница 208: ......
Страница 209: ......
Страница 210: ......
Страница 211: ......
Страница 212: ......
Страница 213: ......
Страница 214: ......
Страница 215: ......
Страница 216: ......
Страница 217: ......
Страница 218: ......
Страница 219: ......
Страница 220: ......
Страница 221: ......
Страница 222: ......
Страница 223: ......
Страница 224: ......
Страница 225: ......
Страница 226: ......
Страница 227: ......
Страница 228: ......