Technical_reference - 第13页
Technical Service Manual 13 Revision Dat e: August 2004 FAN CONTROL OVERVIEW 1) POWER SOURCE: 3 Phase power is provided to either the line term inal s of the Fan Contac tor (K13), the prim ary side of the INVERTER , or 3…
Technical Service Manual 12 Revision Date: August 2004
CONVEYOR OVERVIEW
The electrical portion of the Conveyor System consists of three major components:
1. The DRIVE MOTOR, which drives the belt and/or chain, shafts, and sprockets through a mechanical clutch.
2. The SPEED CONTROL MODULE, which:
A. Receives a 120VAC CONVEYOR RUN SIGNAL from the INPUT/OUTPUT BOARD.
B: Receives a modulated analog DC CONVEYOR SPEED SIGNAL from the CONTROLLER.
C: Sends a variable voltage output to the MOTOR.
3. The ENCODER, driven by the CONVEYOR, which sends a known number of pulses to the CONTROLLER for
each revolution of the conveyor drive shaft.
(10,000 pulses/rev for Stepper Drive Motors and 1,200pulses/rev for Analog Drive Motors)
Technical Service Manual 13 Revision Date: August 2004
FAN CONTROL OVERVIEW
1) POWER SOURCE:
3 Phase power is provided to either the line terminals of the Fan Contactor (K13), the primary side of the
INVERTER, or 3 phase Fan Transformer, or the 3-phase line filter depending on the Oven options and Operating
Voltage.
2) CONTROL ELEMENTS:
Air-Only Ovens:
FAN CONTACTOR (K13) coil is energized by I/0 Board Output Relay A1-K2, K13’s contacts close, 3 phase
power is permitted to flow to/through the Fan CIRCUIT BREAKER(s). (F41 for all upper Fans & F42 for all lower
Fans) to the Fans for Full-Speed On/Off Control.
Nitrogen Option Ovens:
FAN CONTACTOR (K13)
does not exist. I/0 Board Output Relay A1-K2, in this case, serves as the Enable
input to the INVERTER. An analog (modulated) Low Voltage D.C. output from the CONTROLLER signals the
INVERTER to vary it’s output frequency to the Fans, resulting in variable-speed Control of the Fans.
3) FANS:
The FAN MOTORS are Open Frame, 3 Phase, 50/60 Hz, 1/6 Hp, 2800-3400 RPM @ rated frequency,
continuous duty.
Technical Service Manual 14 Revision Date: August 2004
HEAT CONTROL OVERVIEW
The electrical portion of the Heat Control System consists of three major parts:
1) POWER SOURCE:
Three Phase power is provided to the line terminals of the Heater Contactor (K2).
2) CONTROL ELEMENTS:
A) POWER DEVICES:
HEATER CONTACTOR (K2) coil is energized by I/0 Board Output Relay A1-K5, (see Interlocks, below) it’s
contacts close, three phase power is permitted to flow to the Heater CIRCUIT BREAKER(s). (Each Heater has
it’s own Circuit Breaker) and to the SSRs (one Solid State Relay for each Heater) which is the final Heater power
control element.