Technical_reference - 第81页
Technical Service Manual 81 Revision Dat e: August 2004 Tes t procedure f or AC Convenience O utlets Þ Disconnect power to the s y stem . Using an Ohm m eter on its lowest scale, m easure the r esistance between the grou…
Technical Service Manual 80 Revision Date: August 2004
A.C. & D.C. POWER SUPPLIES
CONTROL CIRCUIT TRANSFORMER
The control circuit transformer is a multi-tapped transformer. Determine that the primary conductors to this transformer
are connected in agreement with the supply voltage at the Oven Installation site.
Refer to the table below for transformer tap settings.
SPLIT PRIMARY T1 CONNECTIONS
INPUT
VAC
CONNECT F50 TO
1L1 1L2
INSTALL
JUMPER
190V H1A & H1B H2A & H2B
200V H1A & H1B H3A & H3B
208V H1A & H1B H4A & H4B
220V H1A & H1B H5A & H5B
240V H1A & H1B H6A & H6B
380V H1A H2B H2A & H1B
400V H1A H3B H3A & H1B
415V H1A H4B H4A & H1B
440V H1A H5B H5A & H1B
480V H1A H6B H6A & H1B
Test procedure for control transformer voltage
Þ With main power to the oven off, close the circuit breaker on the line side of the transformer. Open the circuit breaker
on the secondary side of the transformer. Verify that the secondary side of the transformer's neutral leg is grounded.
Þ Re-apply oven power. Using a Voltmeter set the proper range, measure the output voltage of the single phase
control transformer.(X1 – X4)
The output voltage of the transformer should be within +/-10% of the nominal transformer voltage (i.e. 108 VAC to 132
VAC). If the output voltage of the transformer is outside these values, the primary taps of the transformer should be
adjusted accordingly.
120 VAC PERIPHERAL SUPPLY (Option)
Two double way AC convenience outlets are located on the oven.
The 120 volt convenience outlets have their hot terminals connected to wire #5, neutral to wire #2, ground to any ground
terminal on the main electrical back panel. These outlets are protected by circuit breaker F54, located on the main
electrical back panel.
Technical Service Manual 81 Revision Date: August 2004
Test procedure for AC Convenience Outlets
Þ Disconnect power to the system. Using an Ohmmeter on its lowest scale, measure the resistance between the
ground terminal on the socket and the ground block on the main electrical back panel. This value should typically be
less than 1 ohm.
Þ With power applied to the system, use a Voltmeter set on the proper scale, measure the voltage between the live and
neutral terminals on the socket, this value should be to either 120 VAC.
D.C. POWER SUPPLY
Two DC Power Supplies provide the controller and various transducers with the required DC voltage. These supplies
are configured for 120 VAC input.
For Power Supply Wiring Connections, refer to the Oven Schematics
Minimum load:
A minimum load is required by the +5 VDC output to maintain proper operation of the other outputs. A load pulling
0.6 Amp is required. If the load is insufficient, a 10 ohm (5 Watt) resistor should be connected between the +5 VDC
output (wire number 1001) and the DC ground output (wire number 1007).
Test procedure for D.C. power supply voltage:
Verify that all single pole circuit breakers on the secondary side of the transformer are off except F52 & F55. Apply
oven power. If 120 VAC is present, measure the output voltages of the DC power supply.
D.C. power supply voltage adjustment:
Adjustments should be made to correct the voltage at the power supply output terminals. Voltage drops occurring
over lengths of cable should have larger cables installed to reduce voltage losses.
Voltage Checks
When troubleshooting an electrical or electronic problem, always verify the basic AC and DC voltages
supplied for operation.
Technical Service Manual 82 Revision Date: August 2004
OVEN CONTROLLER
The Vitronics Control System is comprised of one DI (Digital Input /Output) board, a back-plane board, and one or more
AI (Analog Input) boards. One AI board controls up to 32 process loops. Each additional AI board increases the number
of control loops by 32. The Vitronics Control System controls the temperature of the cells, drives the conveyor and rail
drive motors, and drives various logic signals through the I/O board.
The Vitronics Control System receives all of its instructions from the computer by a serial interface.
NOTE: DI OR AI BOARDS SHOULD NEVER BE INSERTED OR REMOVED WITH POWER APPLIED TO THE
VITRONICS CONTROL SYSTEM!
Test procedure for D.C. input voltage:
The power requirements for the Vitronics Control System, with one AI board, is:
+5.0 - +5.07 VDC @ 2 Amps max
+15 VDC @ 0.1 Amps max (+12 to +15 VDC)
-15 VDC @ 0.1 Amps max (+15 to -15 VDC)
ð Shut off circuit breaker F55 supplying 120 VAC power to DC power supply.
ð Remove DI and AI boards from Vitronics Control System.
Þ Reactivate 120 VAC power to DC power supply. Using a DC Voltmeter, measure the DC voltages at the backplane
connector:
Oven Controller
Circuit Board
Common
+5V
-15V
+15V
1007
1001
1002
1003