Advanced Energy RFG 1251, User Manual

Page: 28 / 48

4-4 Connectors, Indicators, and Controls 5706058-A
Advanced Energy
®
8 17 PWR REG
MODE SEL Input This signal is used to control the
desired power regulation mode. If pin
8 is open or grounded, the generator
regulates on forward power. A voltage
level of 4 to 30 V on pin 8 selects
delivered power mode. Delivered
power is defined as “forward power
minus reflected power”. Note that the
return pin (pin 17) is common to both
this signal and to the RF PWR ON
signal (see pin 4).
22 9 OVERTEMP Digital
Output A low impedance path between these
pins indicates that an overtemperature
condition has been detected by the
generator. Refer to the troubleshooting
section of the user manual for detailed
information on this fault condition.
10 23 INTERLOCK Input These pins are part of a series interlock
string which must be closed to enable
ac power in the generator. A contact
resistance of 15
Ω
or less across these
pins closes the loop. Pin 10 is
connected to +30 V in the generator.
24 11 AC ON Digital
Output A low impedance path between these
two pins indicates that ac power is
available within the generator. AC
power cannot be enabled unless the
interlock loop is closed.
12 25 CEX LOCK Digital
Output A low impedance path between these
two pins indicates that the generator is
frequency locked to the CEX input
signal. A high impedance path
indicates that there is either no input
signal or it does not meet the required
specifications (see note below).
13 19,21 +15V DC Reference
Voltage This is a regulated dc voltage with a
maximum current capacity of 50 mA.
This signal can be used for controlling
RF power (pin 13 can be jumpered to
pin 4).
19,21 N/A GROUND Ground
Reference These two pins are referenced to the
signal and chassis grounds in the
generator.
Table 4-2. User Port Pins