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User’s Manual                                                                                                                                                UDP6722 Programmable DC Power Supply 

Instruments.uni-trend.com                                                                                                                                                                                     

 

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RS-232  is  the  current  widely  used  serial  communication,  it  also  known  as  the  asynchronous 
communication.  It  is  used  for  data  communication  between  computers  and  computers, 
computers  and  peripherals.  RS  is  the  abbreviation  of  "Recommended  Standard",  232  is  the 
standard  number,  the  standard  is  officially  published  by  the  American  Electronics  Industry 
Association (EIA) in 1969. It requires one bit send by a data line at a time. Usually, RS232 interface 
comes in the form of 9 pins (DB9) or 25 pins (DB25). The most commonly used RS-232 signals are 
shown in the following table: 
 

Table Common RS-232 Signal 

Signal 

Abbreviation 

Pin of 25-core 

connector

 

Pin of 9-core 

connector

 

Request To Send 

RTS 

Clear To Send 

CTS 

Data Set Ready 

DSR 

Data Carrier Detect 

DCD 

Data Terminal 
Ready 

DTR 

20 

Transmitted Data 

TXD 

Received Data 

RXD 

Common Ground 

GND 

 

Except the above table, RS232 also has the minimum subset and that is the connecting way used by 
the instrument.   

 

Table Minimum Subset of RS-232 

Signal 

Abbreviation 

Pin of 9-core 

connector

 

Transmitted Data 

TXD 

Received Data 

RXD 

Common Ground 

GND 

 

15.1.2 RS-232 Connecting 

 

The instrument uses DB9 (femal head) interface. 
Suggestion: To avoid electric shock, please turn off the power supply when plug the 

connector.   

 

Figure 14-1 Interface Definition of DB9 (femal head) Front View 

 

Connecting the instrument to PC via a direct line that has DB9 male head and DB9 femal head. 
 

Summary of Contents for UDP6722

Page 1: ...User s Manual UDP6722 Programmable DC Power Supply...

Page 2: ...y If the product is proved to be defective within the warranty period UNI T reserves the rights to either repair the defective product without charging of parts and labor or exchange the defected prod...

Page 3: ...I T products are protected by patent rights in China and foreign countries including issued and pending patents UNI T reserves the rights to any product specification and pricing changes UNI T reserve...

Page 4: ...ain operation process operation method or similar Product damage or loss of important data may occur if the rules in the Caution statement are not properly executed or observed Do not proceed to the n...

Page 5: ...equipment directly connected to the distribution board and circuit between the distribution board and the socket three phase distributor circuit includes a single commercial lighting circuit Fixed eq...

Page 6: ...sure to ground this product before it is powered on AC power supply Please use the AC power supply specified for this device Please use the power cord approved by your country and confirm that the ins...

Page 7: ...onnel of UNI T for testing Any maintenance adjustment or parts replacement must be done by the relevant personnel of UNI T Cooling Do not block the ventilation holes at the side and back of this devic...

Page 8: ...appliances maintenance 3 1 Specifications and Functions Model Output Range UDP6722 0V 80V 0A 20A 0W 400W 3 2 Accuracy of Instrument Rated output voltage 0 80V Rated output current 0 20A Output power...

Page 9: ...ODBUS Power voltage AC 220V 10 Frequency 50Hz 60Hz Size W H D 214X88X393mm Weight 4 65 kg 3 3 Main Characteristics 4 3 inch TFT LCD Full range high resolution Low ripple and noise Remote sensing funct...

Page 10: ...ng to the display menu on the screen 3 Output port Power output port on front panel 4 Arrow keys To move the cursor 5 Rotary knob To move the cursor and confirm the function 6 Numerical keyboard To in...

Page 11: ...50V 5 Cooling fans Please leave space for cooling 6 Power output port on rear panel It has compensation function If only to use the port on front panel it should use the input terminal attached with t...

Page 12: ...To prevent electric shock please make sure that the power line is securely connect to the ground 5 3 Operation Environment UDP6722 DC power supply is recommended for use under the following environme...

Page 13: ...4 Lift Position 5 6 Daily Checking To avoid the accident please check the instrument before using 1 The instrument s input power should conform to the specification and the power configuration should...

Page 14: ...the load end is equal to the voltage set by the power supply Figure 5 5 Remote Compensation on Rear Panel 5 8 1 Wiring of Remote Sensing 1 Turn off the output of power 2 Remove the shortcircuit plate...

Page 15: ...ck to Measure page Figure 6 1 Measure Page Measure Page No Item Description 1 Functional key Option of shortcut key displayed in the screen 2 Data display Display the real time voltage current and pow...

Page 16: ...ot lock all keys can be use Key has locked only output and unlock key can be use 8 Sound key has turned on Sound key has turned off 9 Time display 10 Voltage and current value measure page is not disp...

Page 17: ...after the instrument boots up The default setting is Off 7 List Setup List mode is used to set the voltage and current value and output time for every steps To complete the various kinds of output cha...

Page 18: ...umber the default is 1 Repeat 1 9999 Times of test cycly the default is 1 Finish Stop Hold Stop stop the output when the test is finished Hold output the last test item when the test is finished Enabl...

Page 19: ...after press this key Step 0 199 Press Step key and then rotate rotary knob or use keyboard to input the line number Voltage 0 85 00V Press Voltage key and then rotate rotary knob or use keyboard to i...

Page 20: ...d Load Loading the file in this line the current list setup will lost Save Save the list setup into this line file Blank line create a new list file Existing file overlay the current file and the name...

Page 21: ...cut key menu 9 2 List File USB Press Udisk File key to enter List file Udisk Figure 9 2 List File Udisk If press Local File shortcut key or plug out USB the interface will switch to local page File op...

Page 22: ...is 1 Repeat 1 9999 Times of test cycly the default is 1 Finish Stop Hold Stop stop the output when the test is finished Hold output the last test item when the test is finished Enable Off On Whether t...

Page 23: ...Step key and then rotate rotary knob or use keyboard to input the line number On Off Press this key can step through On and Off in this line On Turn on the voltage output of this step Off Turn off th...

Page 24: ...e overlay the current file and the name will not change Delete Delete the current file and the default file cannot be deleted Rename Rename the current file and the default file cannot be changd The w...

Page 25: ...upports the operating of load save delete and rename 12 Wave Display Press Wave key to display the currently output wave of voltage current and power The wave refreshes once per 0 1s Figure 12 1 Wave...

Page 26: ...this line file Blank line create a new list file Existing file overlay the current file and the name will not change Delete Delete the current file and the default file cannot be deleted Rename Renam...

Page 27: ...is same as Local file 14 System Setup Menu Press Menu key to enter System page System Setup Item Setting Description Language English Chinese Interface language the default is simplified Chinese Date...

Page 28: ...0 57600 115200 The baud rate of RS232 RS485 and USB bus IP address IP address when connecting LAN bus IP port 502 Port number of LAN bus it cannot be changed Shortcut key at the bottom of the screen M...

Page 29: ...Common RS 232 Signal Signal Abbreviation Pin of 25 core connector Pin of 9 core connector Request To Send RTS 4 7 Clear To Send CTS 5 8 Data Set Ready DSR 6 6 Data Carrier Detect DCD 8 1 Data Terminal...

Page 30: ...on 5 GND 8 485A 9 485B If user uses Modbus protocol it should set the local address 15 3 LAN Port Setup Figure 14 2 LAN Port on Rear Panel Indicator of LAN port LED State Meaning Green Illuminated Con...

Page 31: ...t Caution Keep sprays liquids and solvents away from the instrument or probe to avoid damaging the instrument or probe 2 Cleaning Check the instrument frequently according to the operating condition F...

Page 32: ...mit provided by this summary or other applicable insurance guarantee UNI T does not provide any other explicit or implied guarantee including but not limited to the product trading and special purpose...

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