Daktronics

How to run a loopback test on a DM-100 handheld controller.

Topic

  • How to run a loopback test on a DM-100 handheld controller and DB9 cable.

Environment

  • Product Family: Digit and Price Display
  • Product: DM-100 (ED-13374 revision 5.4, 5.8)
  • Component: DB9 (W-1267)
  • Control System: DM-100 handheld 

Steps

Tools Required:
  1. 2 paper clips or small conductors
  2. T-1118 TRANSFORMER; 12VAC; WALLPACK 6' CORD COAXIAL

Step 1: Set DM-100 in loopback mode.

  • DM-100 - ED-13374 (Rev 5.4 or higher). (This is displayed on the boot up of the handheld).
    1. Power up the DM-100 handheld using a wall pack transformer (T-1118).
    2. Press MENU.
    3. Using the arrow buttons, scroll to DIAGNOSTICS and press Enter.
    4. Using the arrow buttons, scroll to PORT TESTS and press Enter.
    5. Using the arrow buttons, scroll down to CURRENT LOOP (for hardwire) or RS232 COM0 (for radios) and press Enter. (If loopback is not already in place, DM-100 will tell you which pins to connect; these pins are only for testing the DB9 output on the DM-100 and on the RS232 Cable).

Step 2: Put loopback in place at the desired test point. Test points are listed below.

DM-100 and RS232 cable

  • To test the DB9 output on the DM-100, connect pins 6 & 8 and 5 & 9 (for hardwire communication systems) or pins 2 & 3 (for radio systems).
  • To test the DB9 RS232 cable, connect pins 6 & 8 and 5 & 9 (for hardwire communication systems) or pins 2 & 3 (for radio systems).
  • Verify the loop back test is passing on both. (DM-100 will display "Loop back pass"). (Indicates good DM-100 and RS232 cable).
  • Note - If loopback test passes, remove the loopback and test again to ensure test fails. 
Note: Paper clips or another conductor can be inserted into the DB9 female port on the DM-100 or the DB9 RS232 cable to connect the pins.
 

 

KB ID: DD2895901

DISCLAIMER: Use of this content may void the equipment warranty, please read the disclaimer prior to performing any service of the equipment.

DAKTRONICS DOES NOT PROMISE THAT THE CONTENT PROVIDED HEREIN IS ERROR-FREE OR THAT ANY DEFECTS WILL BE CORRECTED, OR THAT YOUR USE OF THE CONTENT WILL PROVIDE SPECIFIC RESULTS. THE CONTENT IS DELIVERED ON AN "AS-IS" AND "AS-AVAILABLE" BASIS. ALL INFORMATION PROVIDED IN THIS ARTICLE IS SUBJECT TO CHANGE WITHOUT NOTICE. DAKTRONICS DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTIES OF ACCURACY, NON-INFRINGEMENT, MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. DAKTRONICS DISCLAIMS ANY AND ALL LIABILITY FOR THE ACTS, OMISSIONS AND CONDUCT OF YOU OR ANY THIRD PARTIES IN CONNECTION WITH OR RELATED TO YOUR USE OF THE CONTENT. ADJUSTMENT, REPAIR, OR SERVICE OF THE EQUIPMENT BY ANYONE OTHER THAN DAKTRONICS OR ITS AUTHORIZED REPAIR AGENTS MAY VOID THE EQUIPMENT WARRANTY. YOU ASSUME TOTAL RESPONSIBILITY FOR YOUR USE OF THE CONTENT AND ANY LINKED CONTENT. YOUR SOLE REMEDY AGAINST DAKTRONICS FOR DISSATISFACTION WITH THE CONTENT IS TO STOP USING THE CONTENT. THIS LIMITATION OF RELIEF IS A PART OF THE BARGAIN BETWEEN THE PARTIES.

The above disclaimer applies to any property damage, equipment failure, liability, infringement, or personal injury claim arising out of or in any way related to your use or application of the content, whether such claim is for breach of contract, tort, negligence or any other cause of action.