Apex Digital 5708009-C 1. User Port 25-Pin APEX Standard Pin Descriptions Continued, Signal, Name

Advanced Energy®

Table 4-1.User Port 25-Pin APEX Standard Pin Descriptions (Continued)

Signal	Return	Name	Signal	Description
Pin	Pin		Type
11		DC BUS OK	Digital	See Signal Pin 24
		RETURN	Output
12	25	CEX LOCK	Digital	When the generator is
			output	successfully phase-locked to an
				external oscillator, a low (opto-
				coupler output) impedance is
				created between this pin and
				return pin 25. (6 mA max)
				See Wiring Diagram 4-11.
13	21	+15 VDC	Analog	This pin, referenced to ground,
			output	provides a +15 Vdc auxiliary
				supply for external use.
				See Wiring Diagram 4-13.
14	1	SETPOINT STATUS	Digital	When the output is equal to the
			output	requested setpoint, a low (opto-
				coupler output) impedance is
				created between this pin and
				pin 1. (6 mA max).
				See Wiring Diagram 4-8.
				Note: This condition is also
				referred to as the generator
				being at setpoint.
15		RFL POWER	Analog	See pin 2
		MONITOR RETURN	output
16		FWD/LOAD PWR	Analog	See pin 3
		MONITOR RETURN	output
17		RF PWR ON	Digital	See pin 4
		RETURN	input
18		SETPOINT	Analog	See pin 5
		RETURN	input
19		DC GROUND	Chassis	This pin represents DC ground
			ground	connection common to chassis
				ground.
20		DC BIAS INPUT	Analog	See pin 7
		RETURN	input
21		CHASSIS GROUND	Chassis	Chassis ground connection
			ground	common to dc ground

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