Measurement Specialties 9116 - Manual (Page 26)

Pressure Systems, Inc. Model 9116 User’s Manual
Page 17 www.PressureSystems.com
2.3.7 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).
2.3.8 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.
2.3.9 Power 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.