page 10
of 35
File: SM1180_r9eng - December 2007 - Technical note: SM1180 & TM 060
SM
1180 & TM060
File: SM1180_r9eng - December 2007 - Technical note: SM 1180 & TM 060
page 11
of 35
SM1180 & TM060
II
) connect the ground screw on panel rear (indicated by
“ground” symbol) directly to the remote microwave head by a
separate yellow/green wire gauge 6 mm²;
III
) the three phases main supply, type phase/phase/phase
/ground, must be provided through connector #1: connect
phases to pin 2, 3 and 7, ground to pin 4:
the connector’s pins can house wires with gauge up to 4 mm²
(vers. T & U), 10 mm² (vers. D); the wires lenght shall be
according to current capability of the wires section;
IV
) the connector #2 brings the input/output signals to the
equipment. Refer to wiring diagram at page 24;
V
) the connector #3 provides the power supply for the fila-
ment transformer (usually located near the magnetron) and the
magnetron fan. Refer to wiring diagram at page 25;
VI
) the connector #5 is the
high voltage
output and must be
connected to magnetron’s cathode. The voltage value is near
7.8 kV
.Use a proper insulated cable with working voltage >10
kVdc and minimum gauge of 0.25 mm²; protect the wire with
sheating (armoured if appropriate) with ext diam. 13 mm max.
Assemble the wire into plug according to AMP’s instructions:
a resin epoxy filling is required. Alter may supply the HV
cable with lenght on request.
VII
) the connector #6 allows the use of the remote “INTER-
LOCK” function: if not requested connect togheter the 2
terminals. Look diagram at page 26.
VIII
) the connector #7, available only on version 54/55, provi-
des the power for control section.
See the relevant chapter “Specs of version 54/55” at page 22,
23.
IX
) the user must provide external circuit breaker . We also
suggest to install a thermal cut-off device, to protect the
SM1180 from short-citcuit and thermal runaway with breaking
capacity > 50 kA: note the unit has a magnetic circuit breaker
with a breaking capacity of 15 kA;
X
) these external protection devices must allow to switch-off
the main line for maintenance operations;
XI
) the external circuit breaker must be a three poles breaker
and must comply the norm EN61010-1;
XII)
the external circuit breaker must be in close proximity to
the SM1180 and within easy reach of the operator;
XIII
) the external circuit breaker must be marked as the
disconnecting device for the SM1180;
XIV
) the connector #1 must never be used as a switch-off
device.
Failure to comply with these instructions may involve con-
siderable risks for the staff responsible for checking and
using the equipment, as well as the risk of general malfunc-
tions of the equipment itself.
Equipment operation
Power-up procedure
To power-up the equipment set the front panel breaker in
“ON” position. In case the breaker trigs to OFF then wait at
least ten seconds before setting it ON again.
This rule must be valid even in case the power is given
by an external contactor (and the panel breaker is always
left in ON state): the OFF state, between two con-
secutive ON state, must last ten seconds minimum.
At power on the unit starts the filament preheating cycle, :
during preheating the “MAGNETRON ON” led flashes twice
per second. At the end of preheating the unit is ready to start
microwave emission on command as described in the next
paragraph: the “MAGNETRON ON” led flashes 5 times per
second and the “READY” contact is closed.
Operating control
The SM1180 operation is controlled by an external command
at +24 Vdc (nominal): the voltage range may vary from 8 to 30
Vdc, common to ground, Z=2.5 kOhm.
The command signal must be wired to pin 3 of the connector
#2: if the user doesn’t have a suitable voltage generator for this
signal, then the equipment’s internal voltage generator can be
used: a voltage signal is available at pin 4 of connector #2. In
this case the user must provide an external contact closing the
circuit between pin 4 and pin 3 to enable the equipment opera-
tion. Refer to wiring diagram at page 24.
When the command is ON and the followings condition are
satisfied:
-the SM1180 has been properly connected to a remote
microwave head,
- there are not alarms conditions,
- the “interlock” loop is closed,
- the filament preheating has been completed, then
the SM1180 reaches the preset value of anodic current and
power-up the remote microwave head.