Remote Control of CPS equipment

Most CPS equipment is equipped with an analog remote control facility. On most Class-E models this is connected via a 25 way D connector with expanded functions compared to the earlier 15 way pinout.

The 25 way socket D type connector on the rear panel allows remote control of the generator. The connector supplied is of the filtered type, It contains individual capacitive feed through filters, one per pin. It is recommended that this type of connector is always used.

Description Of Remote Status Connections / Functions.

Pins 1,2: Remote power set. To enable this function connect pin 17 to a ground pin. The set-point or control is a positive voltage in the range 0v to 5v. 0 volts gives zero output power and 5 volts gives maximum output power.

Pin 3: Incident power. Pin 3 is an analogue output voltage 0-5 volts representing zero to maximum output power.
N.B. This output can source 5mA.

Pin 4: Reflected power. Pin 4 is analogue output voltage 0-5 volts representing 0-maximum output power.
N.B. This output can source 5mA.

Pin 5: RF On/Off. To enable this function connect pin 10 to a ground pin. To enable RF connect pin 5 to a ground pin, via a switch, transistor or relay. This is not latching, grounding pin 5 will switch RF On, and removing this ground will switch RF Off.

Pin 6: Pulse mode. Ground to select pulsed RF operation.
Note that this function is only provided on "R" models, otherwise select pulse mode via front panel switch.

Pin 7,8 Ground

Pin 9: Auxiliary feedback -ve. To enable this function connect pin 16 to a ground pin. The feedback signal should be a negative voltage in the range 0v to -5v. This function is mainly used for plasma dark-space potential (bias) control.

Pin 10: Auxiliary feedback +ve. To enable this function connect pin 16 to a ground pin. Connect this pin to ground at the AMN controller.

Pins 11,12: Not used

Pin 13: External Interlock. When this pin is connected to +12v it allows the
generator output to be switched on. When this pin is open-circuit the
“External” warning light will illuminate.

Pin 14: RF Off light. Pin 9 is an open collector transistor that grounds with RF Off. This can sink 45mA 20V.

Pin 15: Remote RF On/Off Switch Enable. Ground this pin to enable the
remote RF On/Off control function, when it is enabled the remote
indicator on the front panel is illuminated.

Pin 16: Remote feedback enable. Ground this pin to enable the Pin1 Auxiliary feedback function.

Pin 17: Remote RF setpoint enable. Ground this pin to enable the remote
setpoint control, when it is enabled the remote indicator on the
front panel is illuminated.

Pin 18: Not Used

Pin 19: RF On light. Pin 9 is a open collector transistor that grounds with RF On. This can sink 45mA 20V.

Pin 20: +5V. This is a +5V 500mA Output. This may be used as a power
source to illuminate LEDs or power small adapter circuits or displays.

Pin 21: Enable True power mode, in true power mode the RFG raises its power level to compensate for reflected power