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ADVANCED ENERGY
4
RF PWR ON
5
SETPOINT
6
GROUND
7
RF ON STATUS
8
EXTERNAL BIAS
9
RF ON BIAS
10
Reserved
11
INTERLOCK
12
Reserved
13
Reserved
14
Reserved
15
Reserved
User Port Electrical Characteristics
The User port on the RFG 5500 provides analog and digital signals for control and
monitoring of the generator functions. Figure 2-2 shows the electrical diagrams for
2-2
power as measured at the output of the generator. This
signal is scaled at 1 kW per V.
DIGITAL INPUT—This signal is used to activate the RF
output of the generator. A voltage level of 4 V to 30 V on
pin 4 enables the RF power. If pin 4 is open or
grounded, RF power is inhibited.
ANALOG INPUT—This 0 to 10 V signal defines the
desired setpoint for the generator's RF output and is
scaled to represent 0 to 5000 W.
GROUND REFERENCE—This pin is referenced to the
signal/chassis ground in the generator.
DIGITAL OUTPUT—A logic high level (+5 V)
indicates that the RF power is present at the output of the
generator. A logic low level indicates that RF power is
inhibited. The interlock loop must be closed and the RF
PWR ON signal must be active to enable RF power.
REFERENCE VOLTAGE—This pin is tied to the
generator's +15 Vdc through a 5.62 k
intended use of this pin is for notifying the user that ac
power is enabled within the generator.
REFERENCE VOLTAGE—This pin is tied to the
generator's +15 Vdc through a 1.21 kΩ resistor. The
intended use of this pin is to enable RF power by
externally junpering it to pin 4.
Reserved for future use
INTERLOCK—This pin is part of a series interlock
string which must be satisfied to enable ac power in the
generator. Pin 11 must be grounded to enable RF power
(a contact resistance of 1.2 k
satisfy the interlock criteria).
Reserved for future use
Reserved for future use
Reserved for future use
Reserved for future use
December 2000
Ω
resistor. The
Ω
or less to ground will
P/N 5706045C
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