Downloaded - Kodak
Downloaded - Kodak
Downloaded - Kodak
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THEORY GUIDES<br />
Section 7: TEMPERATURE CONTROL BOARD<br />
G128_1702HCA<br />
G128_1702HC<br />
9-PIN<br />
CONNECTOR<br />
5<br />
1<br />
RS232<br />
PWR<br />
PWR<br />
120 \ 240 V AC<br />
50 / 60 Hz<br />
G<br />
IN4 IN3 IN2<br />
GROUND<br />
IN1<br />
NORMAL<br />
+5E V DC<br />
+5V DC<br />
+15A V DC<br />
-5A V DC<br />
5-PIN CONNECTOR<br />
W<br />
R CH8<br />
R<br />
W<br />
R CH7<br />
R<br />
W<br />
R CH6<br />
R<br />
W<br />
R CH5<br />
R<br />
W<br />
R CH4<br />
R<br />
W<br />
R CH3<br />
R<br />
W<br />
R CH2<br />
R<br />
W<br />
R CH1<br />
R<br />
3 WIRE RTD<br />
(TYPICAL 8 PLACES)<br />
The TEMPERATURE CONTROL BOARD is mounted in the ELECTRICAL CABINET of the<br />
PROCESSOR. The unit is a MICROPROCESSOR-based CONTROLLER that can control 8 different<br />
temperatures simultaneously.<br />
The unit consists of 2 CIRCUIT BOARDS. The main CIRCUIT BOARD contains:<br />
• 3 POWER SUPPLIES<br />
• digital MICROPROCESSOR CIRCUITS<br />
• 8 analog input conditioning circuitry<br />
The 3 POWER SUPPLIES generate the necessary DC voltage to control the PROCESSOR. Separate<br />
POWER SUPPLIES generate power for the analog circuitry and the digital circuitry. The third<br />
POWER SUPPLY generates power for the RS232 serial interface and the SOLID STATE RELAY<br />
DRIVERS. By using the separate POWER SUPPLY, electrical noise and possible static damage can<br />
be kept to a minimum.<br />
The digital circuitry consists of:<br />
• Programmable Read Only Memory (PROM)<br />
• Analog-to-digital CONVERTERS<br />
• Light Emitting Diode (LED)<br />
20 06APR99 – TG2044-1<br />
WHITE<br />
RED<br />
RED<br />
PE BL3-3 PIN
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