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NT 0928 Rev.A0
page : 9
2.1.1.1.4.2 Operation:
Press TON briefly to turn power on.
Press TOFF continuously (5s<t<7s) to turn power off during a technical Failure.
Press OFF 3 seconds to power OFF via CDALIM micro signal.
The device can set ON or OFF via an external. Master module using the CD ON or CD OFF signal.
2.1.1.1.5. VBAT and + 5V power supply
VBAT voltage corresponds to mains voltage taken directly from the power unit/charger. Voltage is not
controlled. It powers the display system and the motor, both of which are heavy duty energy consumers.
This voltage is available on TP1 and J2
Min
Max
VBAT
6,5V
7V
The + 5V ± 5% is generated, using VBAT voltage, by the NS 2931 V3 controller low drop-out 0.6V for a
100 mA output current.
It is thus possible to make the best possible use of the battery.This voltage is available on TP2.
The 5V rise time must be greater than 100 ms to allow for the RESET function on the CPU board.
2.1.1.2. Motor control module
The control module of step by step motor is equipped with a gear reduction of 89.286. which makes the
double threaded screw 2 mm turn.
- One motor step is equivalent to 0.8233 µm of linear displacement of the driving bloc.
- One motor turn is equivalent to 22.4 µm of linear displacement of the driving bloc.
2.1.1.2.1. Motor control
Injectomat 2000 Anästhesie motor control is implemented by a stepper motor driver, dual pole control
module for a motor - UBB 5N model - (11.5 Ohm coil) built using an ST L293E IC7 motor control circuit.
It features two functional modules:
The motor control electronic parts, built around the L293E U13 circuit, optimizes consumption and opti-
mal motor torque according to the pump flow rate.
2.1.1.2.1.1 Input signals
These signals are generated by the CPU board microprocessor and available on J02.
They drive the U15 ULN2803 circuit.
2.1.1.2.1.2 Output signals
These signals are connected to the motor coils via J5 connector.
Phase A
A Motor phase control
J2.5
Phase B
B Motor phase control
J2.6
Phase C
C Motor phase control
J2.7
Phase D
D Motor phase control
J2.8
I
Motor current reduction control
J2.9
B00ST
Booster activation and regulation current
J2.10
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