ALTER FX 740 T Instruction Manual

FX 740 T
POWER SUPPLY UNIT
FOR 2 KW MAGNETRON
TECHNICAL NOTE
(Issue October 2004)

FX 740 T
File: FX740T_r0eng - Ottobre 2004 - Manuale per: FX 740 T page 1 di 7
CE Declaration of Conformity
Dichiarazione di Conformità CE
Manufacturer’s Name: ALTER s.r.l
Nome del Costruttore:
Manufacturer’s Address: Via Curie, 8 - 42100 Reggio Emilia - Italy
Indirizzo del Costruttore:
Declare that the microwave generator:
Dichiara che il Prodotto:
product name: FX740
nome del prodotto FX740
model: FX740T
modello FX740T
Complies with the following norms:
Soddisfa le seguenti norme:
EN 61010-1: 1994 + A2: 1996 (EN 61010: 1993 + A2: 1995)
EN55011: 1991
The products listed above comply with the requirements of the Low Voltage Directive 73/23/EEC.
I Prodotti sopraindicati sono conformi con la Direttiva di Bassa Tensione 73/23/EEC
Reggio Emilia, Ottobre 2004.
Marco Garuti
Presidente C.d.A.
Rev. Note di revisione Data File
0 Prima emissione Ottobre 2004 FX740T_r0eng
1
2
3

FX 740 T
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FX 740 T
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General Description
FX740T is a stabilised ferro-resonant power supply unit, with a
xed output, for a 2kW powered magnetron.
The power supply unit must be connected to the 2 x 400V/
50Hz electric network without neutral, and is provided in “open
frame “ version to be assembled in the electrical panel.
General Information
The FX 740 T power supply unit is in compliance with the EN
61010-1 (=CEI 66-5) European Standard approved by Cenelec
on 9/3/1993.
As provided by this standard, the equipment must be installed
and used exclusively by qualied personnel instructed on the
precautions and operating mode.
The generator, if correctly installed, is in compliance with the
expected radio noise limits for Group 2, Class A equipment
provided by the EN 55011 regulation.
CAUTION!
FX 740 T is powered through the mains: read this manual
carefully before installing the equipment.
Make sure that the electric connection and the utilisation
are correct.
Failure to comply with the instructions implies serious risks
for the personnel in charge of the equipment utilisation, as
well as the possibility to cause equipment breakdowns.
Equipment rating
Power supply (rated): 400Vac, 50Hz
Minimum input voltage: 360V
Maximum input voltage: 440V
Input current (average value): 7 A @ 400V
Rating: 2900 VA
Efciency: 95%
Magnetron power: 2 kW
Outgoing stability: +/-3%
Outgoing anodic current: 750 mA
Magnetron: 2M130 - NL10250
Environmental conditions
Operating mode: only inside the panel
Altitude: tested up to 2,000 m above sea level
Temperature: from 5°C to 40°C
Relative humidity: 80% up to 31°C,
linear decrease by 50% at 40°C
Level of pollution: 2, in compliance with IEC664
Fuse specications
FX 740 T has two (F1 and F2) fuses assembled on the control
card and one (F3) fuse assembled on the autotransformer.
F1, F2 fuse data:
- Size, type: 10 x 38 mm, ceramic
- Operating speed: normal
- Rated current: 16 A
- Rated voltage: 500 V
F3 fuse data:
- Size, type: 5 x 20 mm
- Operating speed: delayed (T)
- Rated current: 1 A
- Rated voltage: 250 V
Fuse replacement
Replace the fuses as follows:
- turn the voltage of the power supply unit off;
- remove the cover (if any);
- remove the cap of the fuses;
- replace the fuse with a new one with the same electric charac-
teristics;
- check the fuse holder and in case of oxidation or burns, re-
place it;
- reassemble the cap of the fuses;
- reassemble the power supply unit and turn the voltage on.
Refer to “Fuse specications” for the value of the fuses.

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FX 740 T
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Component Layout
123 4
5 6 7 8
Connection of the H.V. cable to the magnetron
Input
400 V
“Hearth”
screw
Pos. Q.tà Descrizione Codice Note
1 2 H.V. Capacitor CR132A2K5
2 1 H.V. Transformer 42AN3000/8401
3 1 Solid state Relay RERM1C60D50
42 Fuseholder for fuse 10x38 mm FUWBBCH2/38
2 Fuse 10x38 mm 16A 500V FU10X38/16A F1 - F2
5 1 H.V. Diode 80D815
6 1 Measuring resistor RSZ25005R
71 Autotransformer 400V - 230V 42ATC230/001
1 Fuse 5x20 mm 1 A 250V FU5X20T/1A F3
81 Board Holder MOPHOEN/2202505
1 Control board 800000320
Component List

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FX 740 T
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Connection Instructions
I) The power supply unit must necessarily be earthed by
means of the input earth terminal (the rst one on your left
looking from the terminal side) with a 2.5mm ² cable;
II) The head must be connected to the power supply unit by
means of the earth wire on the earth screws of the head and
of the power supply unit; for safety reasons, another earth
wire must be placed on the earth terminal on the head.
III) The connections between the head and the power supply
unit are carried out by means of terminals: do not turn
the power supply on if all the cables are not correctly
connected in their positions.
IV) Apart from the connection cables to the head, the
connections to the START (temporary contact, normally
open), STOP (contact normally closed) button and to the
INTERLOCK chain are required (closed contact to supply
power). If INTERLOCK is not to be used, terminals 17 and
18 can be connected together on terminal board.
NOTE: While it is absolutely compulsory for the START
button to be in temporary contact, the STOP and
INTERLOCK, may be done by a permanent command
(i.e. stopping the power supply when the contact is
open).
V) Install an external switch in order to disconnect the main
power supply, to be used each time maintenance operations
must be carried out on the power supply unit.
VI) The characteristics of the external switch must comply with
the EN 61010-1 standard, it must be installed near the
power supply unit and easily reachable by the user.
VII) In order to carry out the connection to the numbered
terminal board, remove the M320 card from the special
guides; use the yellow extractors present on the card
widening at the same time the hooks blocking the card
present on the guides. Carry out this operation as well
as the reinsertion of the card only when the mains is not
connected.
Failure to comply with these instructions is dangerous for
those who use the equipment, apart from the possibility to
cause equipment breakdowns.
Power-up procedure
Complete the connection correctly before setting at work.
Caution: if the power supply unit is powered without
the provided high-voltage connection between the power
supply unit and the magnetron, it is impossible to start the
continuous power output, but on the outgoing Faston pin
there is a dangerous voltage; DO NOT restore the high-
voltage connection before discharging the capacitor to
earth.
Caution: connect with a direct cable the earth screw
of the head with the earth screw of the power supply
unit. Failure to make this connection may cause
danger of death!
Activate the external switch to power the equipment: the
presence of the mains is indicated by the “POWON” pilot light
on the M320 card. Wait at least 15 seconds for the pre-heating
of the magnetron lament.
Activate the microwave output power by pressing the START
button.
The output of the unit is interrupted when:
1) the STOP key is pressed (opening of the NC circuit of the
stop)
2) the INTERLOCK chain (temporary or permanent opening
of the NC interlock circuit) is opened
3) the safety thermostat (T=132 °C) placed in the high-
voltage transformer TR2 is opened.
4) the safety thermostat (T=100 °C) placed on the Magnetron
is opened.
There are also two other safety mechanisms:
a) the rst one stops the output if the anodic current drops
below the “minimum current” threshold (approx. 40% of
the rated current). For example, this may depend on the
opening of the high-voltage circuit.
b) The second one stops the output if the anodic current
exceeds the “over-current” threshold. (approx. 20% more
than the rated current). For example, this may occur in case
of short-circuit to earth of the high-voltage connection, or
in case of current leakage due to moisture or dust along the
high-voltage path.

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After activating START, if no interlocked conditions are
present, the “ENABLE” led is lit on M320. Within 10 seconds
from the start, the lament voltage limitation relay is switched:
the MWON led is fully lit and the lament voltage drops to an
appropriate value.
NOTES:
· When START is activated, no energy is supplied if any of
the breakdowns mentioned above occurs.
· Do not continue pressing the START key if you do not
obtain any result. Search the cause of the breakdown.
· Never use a permanent-contact switch instead of the
START button, otherwise the interventions of the safety
mechanisms are cancelled.
· Before removing the M320 card, turn off the power by
opening the external switch.
· Never remove the M320 card from the guides during the
operation, even if it is set to STOP.
·Always open the external switch before replacing the fuse
or making connections to the power supply unit.

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FX 740 T
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FAN
TXA20
FX740T
INTERLOCK CHAIN
HIGH VOLTAGE CABLE
25W
AIR cooling GROUND
SCREW
GND
TRANSFORMER
SSRL1
M4
FASTON
HEAD CONN.
1
2
3
4
5
6
TR1
AUTOTRAFO
400
230
0
M320 BOARD
SKBD20 +
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
C1
1.3µF
TR2
HIGH VOLTAGE
1
2
4
3
GND
C2
1.3µF
R1
5ohm
MAGNETRON 2M130
M1
PHASE1
F1
16A 10x3
8
F2
16A 10x3
8
TSW
132°C
F3
1AT 5x20
STOP
START
TSW1
100°C
INTLK1
NC
INTLK2
NC
MOV1
480V
D1
D815
M2
PHASE2
TR3
FILAMENT
F
FA
0
290
230
FA
+
-
RM1C
60D50
M3
GROUND
Attention: you must connect the ground
screw of the MW generator to the
ground screw of the Power supply; failu-
re to comply with this may involve risks
for the staff.
Wiring diagram FX740T with Generator TXA20

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FX 740 T
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Disegnato da
Verificato da
Data
Verificato da
a
l
t
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rDISEGNO N°
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SISTEMI PER L'AUTOMAZIONE
ALTER s.r.l. Via P. M. CURIE, 8
E-mail: [e-mail]
Tel. [phone] Fax [phone]
42100 REGGIO EMILIA, ITALY
Scala
Titolo
Progetto
Data
File
Rev Data Note di revisione Disegnato da
Peso Kg
Q.tà
Codice
Mat.
Stato
Tratt.
Layout
2 0 5 I 3 0 0 1
C.Botti
22/09/2003
0
FX740T
205I3001.idw
22-09-03 Prima emissione Botti
286
25
200
25
10 447 10
467
250
420
�9
40
Technical Assistance:
Alter s.r.l
42100 Reggio Emilia - ITALY
Tel: ++39 0522 553 820; fax ++39 0522 553 577
Web: www.altersystem.com
How to order
Power supplies: FX740T (no cover)
Optional: Cover with handles
Alter reserves the right to improve or modify this products,
at any time, without any obligation to notify any person or
entity of such changes.
No part of this publication may be reproduced without the
express written consent of Alter.
All rights reserved.
Physical characteristics
Total width: 250 mm
Cabinet height: 260 mm
Cabinet depth: 420 mm
Total weight: 32 kg (70 lbs)