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1 Introduction
ECO 9099 SOP05-5090F Rev.00 Effective Date: 12/20/18 Page 49 of 58
1.5.7. Valve Drivers
SmartLyte
®
Plus has 5 solenoid valves for fluid flow control. These solenoids valves (A, B, C,
V, & R) are controlled from power transistors Q1 to Q5. To open a solenoid, a pulse of
voltage 22-24V is applied for 0.5 seconds. Then the voltage drops to 12.5V to hold the
solenoid open. This feature is applied to conserve energy and prevent overheating the
valves.
1.5.8. Pump Motor Driver
SmartLyte
®
Plus has 1 stepper motor for fluid flow. The pump driver circuit provides the
current and controlling steps for the peristaltic pump. Pump roller with installed tubing
ensures fluid flows in one direction from pack to waste pump.
1.5.9. Input Amplifiers
IC U24 – U26 Provide high to low input impendence matching for each electrode (Na, K, Cl,
Ca, & Li) input. These amplifiers provide a gain of 10 for all incoming signals.
1.5.10. Temperature Sensor circuit
This circuit creates a temperature depended voltage which is converted by software to
degree C. In SmartLyte
®
Plus there is no manual adjustment needed.
1.5.11. Analog Channel and A/D Converter
The analog inputs from the amplifiers are connected to IC U23. This IC converts analog
signal to digital readings that is then used by software for instrument operation.
1.5.12. CPU board Connector
In order to fulfill all responsibilities of the CPU board and the program installed on it, is
equipped with a number of connectors to interface it with all peripherals. The description of
the JP connectors is as below:
JP1 – Power connector
JP2 – Serial DB9 RS232 connector
JP3 – Valve board connector
JP4 – Programmer (MFG Only)
JP5 – RFID connector
JP6 – Printer connector
CN3 – Display flex cable connector
CN2 – MFG Only
1.5.13. Valve Board
The valve board contains the LED array used to illuminate the measuring chamber and the
interconnectors used for all solenoids, the peristaltic pump and the door sensor. A ribbon
cable from the CPU Board supplies the electrical connection for each signal through
connector JP5.
Содержание SmartLyte Plus
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