E Beam Power Supply

Applications

Electron beam applications & X-Ray.

Typical Parameters

EB04-220Vac-N1200-120-F30-B400

Output voltage: 120 kV
Output current: 10mA
Filament voltage: 30 V
Filament current: 20 A
Grid bias voltage: – 400 V
Grid bias current: 20mA
This machine contains grid bias of +400V. Positive and negative grid bias switchable.

Controls

There is a red emergency stop button, green power switch and status indicator on the front panel.
The high voltage can be shut down immediately by pressing the red emergency stop button. Rotate the button clockwise, then the button will reset and cancel interlock for high voltage. The green power switch is used to switch on/off main power source. The status indicator shows the working status of the power switch, constant voltage or current status, overvoltage alarm, overcurrent alarm for filament, chain reaction and discharging prompt.

(Front Panel A)

(Front Panel B)

Control Interface

There are three interfaces on the rear panel of the power supply, J1, J2 and J3.
J1 is for DB9, 485 port, which is used to communicate with the computer to control the operating mode.
J2 is DB50, analogue signal transmission port for connection with remote controller.
J3 is RJ45 port and is not available for this machine.

(Rear Control A)

Rear Panel

High power output on rear panel
Fuse
Mains AC input
Grounding bolt
Three signal interfaces: RS485, DB50 and RJ45
INTERLOCK pillar

(Rear Control B)

Wiring

Wiring is as shown in the images below. Make sure that all wiring is well grounded.
Short circuit of interlock pillar.
Do not cover the fan.
Make sure there is a secure connection in place for the high voltage cable and the communication cable.

(Wiring A)

(Wiring B)

HV Interface

Three-core cable, industrial standard HV connector R24 socket and corresponding cable connectors are integrated. Maximum filament current is up to 20A. Output of three-core cable: one for common, one for filament, and one for grid bias. Especially suitable for applications with large filament current.

 

Parameter Settings

All output parameters can have an analog value from 0V to 10V for remote setting.
High voltage 0V to 10V refers to 0kV to -120 kV.
Filament voltage 0V to 10V refers to 0A to 20A.
Grid bias 0V to 10V refers to 0V to -400V.

Dimensions & Case Material

7U to 11U .
Aluminium alloy shell.

Output Diagram

Safety

This power supply contains high voltages and power. Contact with the output may result in fatal injury. It should only be used and maintained by trained personnel.

Before opening the power supply, please check following:
1. Whether the power supply and its environment is clean and dry;
2. Whether there are irrelevant items nearby the output or load of high voltage;
3. Make sure the return current from the load is well grounded via the grounding bolt at the back.

Definitions DB50

 

Pin	Name	Note	Pin	Name	Note
1	BIAS NEG FBK	Feedback for negative grid bias	26	NC	undefined
2	FIL I FBK	Feedback for filament current	27	HV ERR	High voltage error
3	mA FBK	Feedback for beam current	28	BIAS ERR	Grid bias error
4	HV FBK	High voltage feedback	29	HV INV OV TEMP	Overheat  of high voltage inverter
5	BIAS POS FBK	Positive grid bias feedback	30	FIL INV OV TEMP	Overheat of filament inverter
6	BIAS DEM PLC	PLC negative grid bias setting	31	SPARK	Discharging
7	FIL DEM PLC	PLC filament setting	32	CONST mA	Constant current
8	mA DEM PLC	PLC beam current setting	33	NC	undefined
9	HV DEM PLC	PLC high voltage setting	34	NC	undefined
10	AGND	Analog signal ground	35	HV ON PLC	PLC high voltage on
11	FIL ERR	Filament error	36	NEG BIAS ON PLC	PLC negative grid bias on
12	HV C/L	Overcurrent of high voltage inverter	37	FIL ON PLC	PLC filament on
13	FIL C/L	Overcurrent of filament inverter	38	POS BIAS ON PLC	PLC positive grid bias on
14	PFC OV HV	PFC overvoltage	39	BEAM CLOP ON PLC	PLC close beam current on
15	CONST HV	Constant voltage	40	DGND	Signal ground
16	INTERLOCK	Interlock	41	DGND	Signal ground
17	DGND	Signal ground	42	15	+ 15V
18	NC	undefined	43	AGND	Analog signal ground
19	NC	undefined	44	NC	undefined
20	NC	undefined	45	NC	undefined
21	NC	undefined	46	NC	undefined
22	NC	undefined	47	NC	undefined
23	NC	undefined	48	NC	undefined
24	NC	undefined	49	NC	undefined
25	NC	undefined	50	NC	undefined

Note: All error signals are low level. Refer to DGND.
PLC set signal is 0- 10Vdc, where 0 refers to the maximum. Refer to AGND.
For all switching signals, 0v refers to on, suspend or high level refers to off. Refer to DGND.