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Pressure Systems, Inc. NetScanner™ System (9016, 9021, & 9022) User’s Manual
www.PressureSystems.com
2 - 13
Figure 2.5
9022 Jumper (JB1) Set For 10 VDC Excitation
2.3.8 Case Grounding
The 9016 and 9021/9022 modules contain 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).
2.3.9 Trigger Input Signal
Models 9016, 9021, and 9022 each support 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 9016, 9021,
or 9022 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.
2.3.10 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 9016 ,
9021, and 9022 modules complete the power up and self diagnostics in approximately 30 seconds.
See Chapter 6, Troubleshooting Guide for additional information and potential problem areas
during the power-up sequence.
NOTE: The factory default setting for jumper JB1 is 10 VDC