The main module of the TSX17 PLC (Programmable Logic Controller) also has eleven (11) outputs to control various functions of the dryer. The outputs are relay contacts, whereby each of the relays have a common terminal tied to 110 VAC.
•Output 0,0 is used to control the Main Blower Contactor. On a call for fan, the output supplies 110 VAC to the coil of the fan motor contactor. As long as none of the overloads have tripped, the contactor will engage (pull in) starting the dryer.
•Output 0,1 activates the Drum (tumbler) Forward Contactor, which starts the tumbler (basket) running via the two (2) 5 horsepower (HP) drive motors.
•Output 0,2 is used to reverse the direction of the drive motors.
•Output 3 was previously used to activate an intended lint collection system. The output was to be used from the beginning of a cycle until
•Output 4 is used to initiate the burner controller at the beginning of a heat cycle. During a heat cycle, the out- put stays on enabling the standing pilot to be active (on) as long as the burner controller safeties have all been met. If ALL the safeties are met, the incoming gas valve will turn on. This puts the dryer in a high fire standby.
•Output 5 is used to cycle high fire on and off in conjunction with Output 4 during the heat cycle. This is the output that maintains the set point temperature.
•Output 6 and Output 7 are used to control the Main Load Door. Output 6 controls the load door opens solenoid (S1) and Output #7 controls the load door close solenoid (S2).
•Output 8 and Output 9 are used to control the Rear Door. Output 8 controls the unload door open solenoid (S3) and Output 9 controls the unload door close solenoid (S4).
•Output 10 is the Front Up control. When it turns on, 110 VAC is supplied to the front up solenoid (S5) through the rear door level switch (LS2B).
•Output 11 controls the Front Door solenoid (S6). When 110 VAC is supplied to the front door solenoid, air is supplied to the top ports of the piston leveling the dryer.
Due to the amount of outputs needed, an additional output module is added to the TSX17 PLC (Programmable Logic Controller). This output module consists of relay contacts with the common tied to 110 VAC.
•Output 1,0 is used to tilt the rear of the dryer up for unloading purposes. If the front of the dryer is up, the front door level switch (LS1B) closed to allow the rear up solenoid (S7) to engage.
•Output 1,1 supplies 110 VAC to the rear down solenoid (S8).
•Output 1,2 and Output 1,3 are used to control the position of the Heat Reclaimer. When Output 1,2 is on, the heat reclaimer is in the exhaust air mode. ALL the air moved by the blower goes out of the exhaust. When Output 1,2 turns off and Output 1,3 turns on, the dryer goes into a recirculating mode (heat reclaimer on) whereby a percentage of the air no longer goes out of the exhaust but goes over the burner as preheated air. The heat reclaimer is on as long the dryer is in a heat mode.
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