Measurement Specialties 9116 User Manual

Pressure Systems, Inc.                                                                                        Model 9116 User’s Manual 
 
 

 

Page 17 

 

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Case Grounding 

 
The Model 9116 module contains a case bypass capacitor which allows the module case to be 
mounted on hardware with a small common mode line voltage (less than 20 Volts). 
 

Trigger Input Signal 

 
Model 9116 supports the use of a data acquisition synchronization signal, sometimes called 
“Hardware Trigger.”  When configured through the Define/Control Host Stream (‘c’) command, 
the trigger signal can be used to initiate and synchronize data acquisition and stream outputs to 
the host. 
 
The trigger signal is intended to be a 2-wire differential signal brought in through the Model 
9116 main electrical connector.  The signal may be driven by a standard TTL compatible device.  
The switching threshold for this signal is set at 2.5 VDC. 
 

 
Upon power-up of the module, the internal firmware will perform a number of self-diagnostic 
checks.  The results of these tests are reflected by the ‘OK’ LED on the top panel. The Model 
9116 module completes the power up and self diagnostic. 
 
See Chapter 6, Troubleshooting Guide for additional information and potential problem areas 
during the power-up sequence.