Measurement Specialties 9116 user manual Case Grounding, Trigger Input Signal

Pressure Systems, Inc. Model 9116 User’s Manual

2.3.7Case 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).

2.3.8Trigger 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.

2.3.9Power Up Checks and Self-Diagnostics

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.

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