Cata-Dyne™ Infrared Oven

Operation and Instructional Manual - Identification

Terminal Identification

Each 4 pin terminal block connects to 2 heaters (refer to drawings TC_MEAS1, 2, 3 or 4).  The top-most and bottom-most terminal on each block is the power supply to the pre-amps and should read from 14 VDC to 18 VDC.  Of the two middle terminals, the lower is the lower number heater, the upper is the higher number heater.  In other words, the signal terminals are the 2 middle terminals in each 4 wide terminal block and the heater number increases  from the bottom up.

Explosion-Proof Heater Terminal Connections

The thermocouples used for X-proof heater temperature sensing are dual thermocouples in a single housing.  This redundancy allows detection of problems which could not be detected using a single thermocouple; specifically pre-amp, wiring, and multiplexer faults.  The control system reads both thermocouples and must see agreement within 6.25% or it will shut down the affected zone of the heating system.

Each 4 pin terminal block connects to a single heater (refer to drawings TC_MEAS1,2,3 or 4).  The top-most terminal is GND.  The next terminal is the power supply to the dual pre-amp card and should read from 14 VDC to 18 VDC.  The two bottom-most terminals are the signal pins.  The voltage at the signal pins should be within 5% of each other.  The heater number increases from the bottom up.

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