File: SM1280_r7eng - April 2017 - Technical note: SM1280
page 7 of 27
SM 1280
SM 1280
SM 1280 Ratings & Specifications
Description
Units
Value
Function
Note
SM1280T
: Line input nominal:
Working voltage range
Max Absolute voltage:
Input Current, max:
V
ac
V
ac
V
ac
A
rms
3x400
360÷440
450
18.5
Power input, 3 phase + GND
@400V input, full power
CONN #1, pin 2-3-7
See wiring schematic
SM1280D
: Line input nominal:
Working voltage range
Max Absolute voltage:
Input Current, max:
V
ac
V
ac
V
ac
A
rms
3x208
185÷230
300
30
Power input, 3 phase + GND
@208V input, full power
CONN #1, pin 1-4-6
See wiring schematic
S
M1280U
: Line input nominal:
Working voltage range
Max Absolute voltage:
Input Current, max:
V
ac
V
ac
V
ac
A
rms
3x480
390÷570
600
14.5
Power input, 3 phase + GND
@480V input, full power
CONN #1, pin 2-3-7
See wiring schematic
Transient Overvoltage
Cat. II
According IEC 664
Output power, max
W
dc
8500
Electrical power to magnetron input
Electrical efficiency (Out/In)
92%
Max heat to dissipate ~ 700 W
Output current range:
mA
120÷1200
Adjustable range 10÷100%
Output current max:
mA
1200
Limit in Power Control Mode
With max amb temp. 40°C
Output voltage, max:
V
dc
7800
Characteristic of magnetron
Range 7.4÷7.8 kV
Output ripple, max
±4.5%@ 300 Hz
±3% @ 40 kHz
Ripple in current at max power
Output linearity:
W
dc
±15
Corresponding to ~ 10 W
rf
Output stability:
1%
For input fluctuations within ±10%
Filament pre-heating time
sec
15
Preheat filament at Power
ON or after Hibernate is OFF
When done, READY signal is ON
Magnetron power:
[Frequency]
kW
MHz
6
[2450 ]
Typical: YJ1600, H3881,
PM60, AM3881, E
Selectable filament backdown curve
for the specific tube
Enabling signal, digital input:
V
dc
+24
Range
5÷30
ON/OFF output & alarm reset
Input Z: 4k7 kOhm
CONN #2, pin 4. To reset alarm hold
OFF for 2 seconds
Response time to full power:
msec
80
Linear time
Using Enabling signal
Response time to switch OFF:
msec
20
Using Enabling signal
Pulsability of output, min T
ON
msec
100
Max power 6 kW, Freq= 5 Hz
Using Enabling signal
Switch OFF time for alarm
msec
3
Automatic shut-off
Reference signal, analog input:
V
dc
1÷10
Power control 10÷100%
CONN #6, pin 5. Ground pin 18.
Input Z=50 kOhm, optoinsulated
Alarm contact, general:
Contact rating: max voltage
max current:
V
mA
30
500
OPEN: Alarm state or power
OFF
CLOSED: OK
CONN #6, pin 1-14
Alarm code, 4 bit contacts (0/1)
Contact rating: max voltage
max current
V
mA
30
100
Inform type of alarm with
emission of 4 bit code
See relevant table
CONN #6, pin 8-21-9-22 (bit 0...3)
Common pin 13
Ready contact:
Contact rating: max voltage
max current
V
mA
30
500
CLOSED when filament is
pre-heated & ready
OPEN not ready filament or
Alarm state
CONN #6, pin 12-24
Hibernate signal, digital input:
V
dc
+24
Range
5÷30
ON filament is hibernate.
OFF
or not used
:filament heated
CONN #6, pin 11
Z= 4k7 kOhm
Interlock contact:
OPEN: Alarm, shut OFF
outputs. CLOSED: OK
CONN #6, pin 10-23
Monitor signals, analog outputs (2):
V
dc
0÷10
Monitors various parameters
Max current: 10 mA
See relevant schematic
CONN #6, pin 2-15 (1); pin 3-16 (2)
Designed for receiver impedance
>30 kOhm (for accuracy <1%)
Voltage output (internal generator)
V
dc
+24÷30
Auxiliary voltage genera
-
tor, unregulated, for user
interface
CONN #6, pin 10, 20. Max current:
100 mA
Summary of Contents for SM 1280
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