GM 140
page 4
of 12
File: GM140_r0eng - October 2003 - Technical note: GM 140
GM 140
File: GM140_r0eng - October 2003 - Technical note: GM 140
page 5
of 12
Pin
Name
I/O
Description
Logic
1
POWER STAGE ON
In
Enables power section
High level enables
2
HIGH VOLTAGE ON
In
Enables high voltage section
High level enables
3
MICROWAVE ON
In
Enables microwaves emission
High level enables
4
RESET
In
Reset after an alarm occurrence.
High level enables *
5
CW/PULSE MODE
In
Continuous/pulsed mode selection
High level selects pulsed mode
6
OVER DUTY
Out
Alarm
High level means alarm
7, 8,
9, 10
In
Pulse pattern for pulsed mode, see
forward.
11
Common 24Vdc
12
+24 V - ISOL
mirror for pin15
13
GROUND
14
GROUND
15
+24 V - ISOL
In
External Insulated 24 Vdc
16
MICROWAVE IS
ACTIVATED
Out
mirror for pin3
17
HIGH VOLTAGE IS
ACTIVATED
Out
mirror for pin2
18
unused
19
MW MODULE IS
READY
Out
Raises 5 seconds after power on: once
pre-heating is complete.
20,
21
In
Pulse pattern for pulsed mode, see
forward.
22
FAILURE COOLING
MAGNETRON
Out
Alarm
High level means alarm
23,
24
ALARM CONTACT
Out
Alarm contact
Open in case of alarm (or switch off)
25
VALUE LESS THEN
SET VALUE
Out
Warning
High level means warning
POWER SECTION
HV SECTION
GM 140
POWER STAGE ON
HIGH VOLTAGE ON
MICROWAVE ON
HIGH VOLTAGE
FILAMENT
MW
ALARM
* After removing alarms cause set high for 1 sec. the reset signal to clear the alarm; a high value in this
signal inhibits the latching of fhurter alarms.