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MODEL 7748 SINGLE CHANNEL RS530 DB25 A/B SWITCH W/CUTOFF, TELNET AND GUI 

 

Electro Standards Laboratories, Inc.  

                      (401) 943-1164       

www.electrostandards.com         - pg 8 -                                  Pub. 4703-02 

 

OPERATION 

The Model 7748 can be operated either by the front panel or through its 
Remote port.   

Figure 2: Model 7748 Front Panel 

 

Manual Control 

The front panel view of the Switch System is shown in the above figure.  
On the front of the switch are the following controls and indicators: 

  A, B INDICATORS

 – Red LED’s indicate the switch position as 

well as the power status. 

o

 

The LED in the steady state indicates the position of 
the switch. 

o

 

If the front panel pushbutton is locked and the button 
is pressed, both LED’s will light until the pushbutton is 
released. 

o

 

When first powering up, both LED’s will light and flash 
during the power up routine. 

o

 

If the Remote Ethernet port is reset on power up, both 
LED’s will light and flash a few times for several 
seconds until completing its routine and displaying the 
present position. 

  MANUAL PUSHBUTTON

 – The front panel pushbutton allows 

the switch position to be changed. 

o

 

Depressing and releasing the pushbutton allows the 
user to toggle the switch position. 

o

 

Pushbutton control can be inhibited if locked out 
remotely. 

o

 

Pressing and holding the pushbutton on power up will 
initiate the Remote Ethernet port reset routine. 

Model 7748 Front Panel 

Pushbutton and LED’s 

Summary of Contents for 7748

Page 1: ...MODEL 7748 Single Channel RS530 DB25 A B Switch with Cutoff Position Telnet and GUI Catalog 307748...

Page 2: ...within the applicable warranty period or Due to misapplication modification dis assembly abuse improper installation by others abnormal conditions of temperature dirt or corrosive matter or Due to op...

Page 3: ...nd Electro Standards Laboratories ESL If you do not agree to all the terms of this agreement promptly return the switch and the accompanying items including all written materials and their containers...

Page 4: ...TROL 8 REMOTE TELNET COMMANDS 9 SWITCH POSITION ON POWER DOWN 9 REMOTE ETHERNET CONNECTIONS 10 VERIFY THE HARDWARE 10 IF NO LAN IS AVAILABLE USE A CROSSOVER CABLE 10 IF CONNECTING TO A LAN USE 10 100B...

Page 5: ...Commands 9 TABLE OF FIGURES Figure 1 Model 7748 Rear Panel 6 Figure 2 Model 7748 Front Panel 8 Figure 3 Crossover Cable connection for no LAN 10 Figure 4 Connecting to a LAN with 10 100Base T cable 1...

Page 6: ...l 7748 is enclosed in a 1U full rack size all metal black chassis designed to provide EMI RFI shielding and fit in a standard 19 rack Features The switch ports are transparent to all data All 25 pins...

Page 7: ...device port B DB25 M the B device port Power Supply After all the proper connections have been made plug the Model 7748 into a 100VAC 240VAC 50Hz 60Hz wall receptacle using the supplied 12VDC 500mA UL...

Page 8: ...rds Laboratories Inc 401 943 1164 www electrostandards com pg 7 Pub 4703 02 Ethernet Remote Port Pinout SIGNAL NAME PIN DIRECTION TRANSMIT DATA A XMT A 1 OUTPUT TRANSMIT DATA B XMT B 2 OUTPUT RECEIVE...

Page 9: ...the switch o If the front panel pushbutton is locked and the button is pressed both LED s will light until the pushbutton is released o When first powering up both LED s will light and flash during th...

Page 10: ...Position that isolates all communication ports Upon power restore the unit will automatically switch to the Default Position This Default Position is configurable by the user through Telnet Commands...

Page 11: ...Crossover Cable If no LAN connection is available the user can use a crossover cable Plug one end of the cable into the RJ45 Remote port on the rear of the switch and the other end into the computer N...

Page 12: ...amework is not already installed it must first be installed The NET Framework can be downloaded from Microsoft s website either as a web install or as a standalone installation The latest version of D...

Page 13: ...n IP Address via its AutoIP protocol This AutoIP assignment is what allows the unit to still be found via DeviceInstaller It is strongly recommended to keep AutoIP enabled if DHCP is in use Figure 6 U...

Page 14: ...e Remote Ethernet port To reset the IP address settings and any security settings such as password protection on the Telnet Configuration port the following steps must be performed Power down the unit...

Page 15: ...pports Telnet can be used such as PuTTY or the Telnet client can be enabled for the command line To enable the Telnet client for command line use open the Control Panel Select Programs if in Category...

Page 16: ...andard Web Browser The Java Applet can also be accessed from the DeviceInstaller application To control the Model 7748 using DeviceInstaller follow the steps listed below Open your DeviceInstaller app...

Page 17: ...pear at the top of the panel along with a green GO button To launch the Model 7748 GUI simply click the GO button Figure 8 GUI in DeviceInstaller Software Features Access User Interface via standard w...

Page 18: ...QFjAG url http 3A 2F 2Fjavadl sun com 2Fwebapps 2Fdownload 2FAutoDL 3FBundleId 3D984 26 ei MeOzVOrYN8qvogT454CICQ usg AFQjCNGZpaLP5IT6M3r6Y 0Dd491J4tXaLg The file name is jre 8u25 windows i586 exe Ove...

Page 19: ...e Security tab move the slider down to medium see Figure 9 Medium allows self signed application to run while still alerting to all potential security hazards on a case by case basis Optionally if the...

Page 20: ...ompt for permission before continuing see Figure 10 Please confirm that the information presented regarding the name and location is correct before proceeding Note that the publisher will show as Unkn...

Page 21: ...Switch Position and Lock Status To change the switch position click on the radio button A or B as desired Locking and unlocking the front panel pushbutton can be done by clicking on the Locked or Unlo...

Page 22: ...ss in the device installer application Once you have access to the switch you can change the static IP address from the panel in Figure 12 When changing to a static IP address make sure no other devic...

Page 23: ...to open the Network setup screen Figure 13 Windows Security Alert This is because the GUI needs to open a UDP port port number 51164 to communicate with the switch Click Unblock button to allow the op...

Page 24: ...will see the following screens Figure 15 and Figure 16 Figure 15 IP address is updated Figure 16 Refresh Browser after update Close the above screens and re open a browser window and type in the new I...

Page 25: ...to ensure that the Remote Connection is still accessible Remote Connection Issues A telnet session with the unit cannot be opened Check that the physical connections are correct See section Remote Eth...

Page 26: ...ure in the Resetting the Remote Ethernet Port section on page 13 When attempting to load the GUI a pop up is shown saying that this was blocked by current security settings Due to changes in security...

Page 27: ...0 without condensation Power Requirements DC Voltage 12VDC DC Current 300mA peak 200mA nominal DC Power 3 6W peak 2 4W nominal Signal Port Ratings Max Power 60W 125VA Max Voltage 220VDC 250VAC Max Cur...

Page 28: ...tance ordering assistance or communications cables of any length or configuration please contact Electro Standards Laboratories 877 943 1164 and ask for sales customer support Technical Support For te...

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