APPENDIX B: ELECTRICAL AND DATA CONNECTIONS
UNIFLOW
®
4 PULSED HEAT CONTROL
990-908 B-21
Main Thermocouple Input Connector (J9)
Thermocouple wires are to be connected to pins 4 and 5 on Connector J9.
Polarity Type “E” Type “J” Type “K”
J9 - Pin 4
(+) Chromel (purple) Iron (white) Chromel (yellow)
J9- Pin 5
(-) Constantan (red) Constantan (red) Almel (red)
CAUTION
Incorrect wiring of the main thermocouple may cause damage to thermode.
If the main thermocouple is not wired correctly on Pins 4 and 5 of J15 or the thermocouple is damaged,
the temperature displayed for the main thermocouple may slowly decrease as the Control applies heat to
the thermode during a process. This may cause an error message or may damage the thermode due to
overheating.
Pins 1, 2, and 3 on connector J9 are jumpered to inform the Control of the type of thermocouple used for
both the Main and Auxiliary thermocouples. Both thermocouples must be of the same type. Pins 1, 2,
and 3 are to be jumpered according to the configurations listed in the following table.
Thermocouple Type Configuration
Type “E”
No Jumpers on J9
Type “J”
Jumper Pins J9-1 and J9-2 together. J9-3 to be
unconnected.
Type “K”
Jumper Pins
J9-2 and J9-3 together. J9-1 to be
unconnected.
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