Advanced Energy RFG 1251 User Manual page 28

®
Advanced Energy
Table 4-2. User Port Pins
8 17 PWR REG
MODE SEL
22 9 OVERTEMP
10 23 INTERLOCK
24 11 AC ON
12 25 CEX LOCK
13 19,21
19,21 N/A GROUND
4-4
Input
Digital
Output
Input
Digital
Output
Digital
Output
+15V DC Reference
Voltage
Ground
Reference
Connectors, Indicators, and Controls
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).
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.
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.
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.
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).
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).
These two pins are referenced to the
signal and chassis grounds in the
generator.
5706058-A