Measurement Specialties 9116 User Manual

Pressure Systems, Inc.                                                                                        Model 9116 User’s Manual 
 
 

 

Page 118 

 

www.PressureSystems.com 

 

 

  Checking Module Power-Up Sequence  

 
(1)    Proper power to the module should first be verified.  If possible, verify that the output of  
 

  the module power supply is set within the range of 18-36 VDC.  This should be nominally  

 

set for 24 VDC.    Ensure the power supply setting is high enough to compensate for 
cable voltage drops if long interface cable lengths are used.     

 
(2) 

Turn module power switch ON and verify the following top panel LED status following  

 

initial power-up : 

 

•  PWR LED should remain ON 

 

If this LED is not on, all other LED’s will likely also be off.  Check the PSI 90DB, remote  

 

power supply (8491), or customer provided power supply to ensure the proper voltage  

 

(18-36 VDC) is being provided.  Also verify that the power pins in the module interface  

 

cable are wired as described in Section 2.3.2 and Appendix D 

•  COL LED will illuminate briefly upon power-up.  This gives a visual indication that the 

LED is functional.  Thereafter, the LED should remain OFF. 

 

•  Tx LED will illuminate briefly upon power-up.  This gives a visual indication that the LED 

is functional.  Subsequent activity on the Tx LED during the power-up  

 

    sequence is indication that the RARP/BOOTP protocol is enabled.  This will typically  

 

    occur following the initial busy (BSY) LED cycle and continue until an appropriate RARP  

 

    reply is received.  

 

•  LNK LED will illuminate briefly upon power-up.  This gives a visual indication that the 

LED is functional.  Thereafter, the LED will indicate proper connection to an Ethernet 
hub or switch, and should remain ON.  

 

     

If this LED is OFF, verify that the module is properly connected to the  

 

     

communications hub or switch.  Verify proper power is applied to the hub.  Also  

 

     

try connecting the 9116 cable to a different port of the hub.  Note that most hubs  

 

     

have similar link LEDs to indicate proper connection to the hub itself.  If present,  

 

     

verify that the hub link LED for the pressure scanner and the host computer are  

 

     

both active.  If the hub is functioning correctly, verify that the communications  

 

     

pins in the module interface cable are wired as described in Section 2.3.4.1 and  

 

     

Appendix D.